diff --git a/flap/tests/02-Interpreter/01-arithmetic-01.eval.hopix b/flap/tests/02-Interpreter/01-arithmetic-01.eval.hopix
new file mode 100644
index 0000000..8c1076f
--- /dev/null
+++ b/flap/tests/02-Interpreter/01-arithmetic-01.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id main))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Apply((value(Variable((value(Id print_int))(position((start_p(""1 0 11))(end_p(""1 0 20)))))()))(position((start_p(""1 0 11))(end_p(""1 0 20)))))((value(Literal((value(LInt 999))(position((start_p(""1 0 22))(end_p(""1 0 25)))))))(position((start_p(""1 0 21))(end_p(""1 0 26)))))))(position((start_p(""1 0 11))(end_p(""1 0 26)))))))))(position((start_p(""1 0 0))(end_p(""1 0 26))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/01-arithmetic-01.eval.hopix.human-readable b/flap/tests/02-Interpreter/01-arithmetic-01.eval.hopix.human-readable
new file mode 100644
index 0000000..9c01e18
--- /dev/null
+++ b/flap/tests/02-Interpreter/01-arithmetic-01.eval.hopix.human-readable
@@ -0,0 +1 @@
+let main = print_int (999)
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/01-arithmetic-01.expected b/flap/tests/02-Interpreter/01-arithmetic-01.expected
new file mode 100644
index 0000000..cf5106d
--- /dev/null
+++ b/flap/tests/02-Interpreter/01-arithmetic-01.expected
@@ -0,0 +1 @@
+999
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/02-arithmetic-02.eval.hopix b/flap/tests/02-Interpreter/02-arithmetic-02.eval.hopix
new file mode 100644
index 0000000..57ad3ea
--- /dev/null
+++ b/flap/tests/02-Interpreter/02-arithmetic-02.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id x))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Apply((value(Apply((value(Variable((value(Id `+`))(position((start_p(""1 0 11))(end_p(""1 0 12)))))()))(position((start_p(""1 0 11))(end_p(""1 0 12)))))((value(Literal((value(LInt 72))(position((start_p(""1 0 8))(end_p(""1 0 10)))))))(position((start_p(""1 0 8))(end_p(""1 0 10)))))))(position((start_p(""1 0 8))(end_p(""1 0 10)))))((value(Literal((value(LInt 1))(position((start_p(""1 0 13))(end_p(""1 0 14)))))))(position((start_p(""1 0 13))(end_p(""1 0 14)))))))(position((start_p(""1 0 8))(end_p(""1 0 14)))))))))(position((start_p(""1 0 0))(end_p(""1 0 14)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 15 19))(end_p(""2 15 23)))))()((value(Apply((value(Variable((value(Id print_int))(position((start_p(""2 15 26))(end_p(""2 15 35)))))()))(position((start_p(""2 15 26))(end_p(""2 15 35)))))((value(Variable((value(Id x))(position((start_p(""2 15 37))(end_p(""2 15 38)))))()))(position((start_p(""2 15 36))(end_p(""2 15 39)))))))(position((start_p(""2 15 26))(end_p(""2 15 39)))))))))(position((start_p(""2 15 15))(end_p(""2 15 39))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/02-arithmetic-02.eval.hopix.human-readable b/flap/tests/02-Interpreter/02-arithmetic-02.eval.hopix.human-readable
new file mode 100644
index 0000000..6a0608a
--- /dev/null
+++ b/flap/tests/02-Interpreter/02-arithmetic-02.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let x = 72 + 1
+let test = print_int (x)
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/02-arithmetic-02.expected b/flap/tests/02-Interpreter/02-arithmetic-02.expected
new file mode 100644
index 0000000..e77a963
--- /dev/null
+++ b/flap/tests/02-Interpreter/02-arithmetic-02.expected
@@ -0,0 +1 @@
+73
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/03-arithmetic-03.eval.hopix b/flap/tests/02-Interpreter/03-arithmetic-03.eval.hopix
new file mode 100644
index 0000000..45bbd81
--- /dev/null
+++ b/flap/tests/02-Interpreter/03-arithmetic-03.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id x))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Apply((value(Apply((value(Variable((value(Id `-`))(position((start_p(""1 0 11))(end_p(""1 0 12)))))()))(position((start_p(""1 0 11))(end_p(""1 0 12)))))((value(Literal((value(LInt 72))(position((start_p(""1 0 8))(end_p(""1 0 10)))))))(position((start_p(""1 0 8))(end_p(""1 0 10)))))))(position((start_p(""1 0 8))(end_p(""1 0 10)))))((value(Literal((value(LInt 1))(position((start_p(""1 0 13))(end_p(""1 0 14)))))))(position((start_p(""1 0 13))(end_p(""1 0 14)))))))(position((start_p(""1 0 8))(end_p(""1 0 14)))))))))(position((start_p(""1 0 0))(end_p(""1 0 14)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 15 19))(end_p(""2 15 23)))))()((value(Apply((value(Variable((value(Id print_int))(position((start_p(""2 15 26))(end_p(""2 15 35)))))()))(position((start_p(""2 15 26))(end_p(""2 15 35)))))((value(Variable((value(Id x))(position((start_p(""2 15 37))(end_p(""2 15 38)))))()))(position((start_p(""2 15 36))(end_p(""2 15 39)))))))(position((start_p(""2 15 26))(end_p(""2 15 39)))))))))(position((start_p(""2 15 15))(end_p(""2 15 39))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/03-arithmetic-03.eval.hopix.human-readable b/flap/tests/02-Interpreter/03-arithmetic-03.eval.hopix.human-readable
new file mode 100644
index 0000000..022a0f0
--- /dev/null
+++ b/flap/tests/02-Interpreter/03-arithmetic-03.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let x = 72 - 1
+let test = print_int (x)
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/03-arithmetic-03.expected b/flap/tests/02-Interpreter/03-arithmetic-03.expected
new file mode 100644
index 0000000..2fb681e
--- /dev/null
+++ b/flap/tests/02-Interpreter/03-arithmetic-03.expected
@@ -0,0 +1 @@
+71
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/04-arithmetic-04.eval.hopix b/flap/tests/02-Interpreter/04-arithmetic-04.eval.hopix
new file mode 100644
index 0000000..ecf4cab
--- /dev/null
+++ b/flap/tests/02-Interpreter/04-arithmetic-04.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id x))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Apply((value(Apply((value(Variable((value(Id `*`))(position((start_p(""1 0 11))(end_p(""1 0 12)))))()))(position((start_p(""1 0 11))(end_p(""1 0 12)))))((value(Literal((value(LInt 37))(position((start_p(""1 0 8))(end_p(""1 0 10)))))))(position((start_p(""1 0 8))(end_p(""1 0 10)))))))(position((start_p(""1 0 8))(end_p(""1 0 10)))))((value(Literal((value(LInt 2))(position((start_p(""1 0 13))(end_p(""1 0 14)))))))(position((start_p(""1 0 13))(end_p(""1 0 14)))))))(position((start_p(""1 0 8))(end_p(""1 0 14)))))))))(position((start_p(""1 0 0))(end_p(""1 0 14)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 15 19))(end_p(""2 15 23)))))()((value(Apply((value(Variable((value(Id print_int))(position((start_p(""2 15 26))(end_p(""2 15 35)))))()))(position((start_p(""2 15 26))(end_p(""2 15 35)))))((value(Variable((value(Id x))(position((start_p(""2 15 37))(end_p(""2 15 38)))))()))(position((start_p(""2 15 36))(end_p(""2 15 39)))))))(position((start_p(""2 15 26))(end_p(""2 15 39)))))))))(position((start_p(""2 15 15))(end_p(""2 15 39))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/04-arithmetic-04.eval.hopix.human-readable b/flap/tests/02-Interpreter/04-arithmetic-04.eval.hopix.human-readable
new file mode 100644
index 0000000..5a88af7
--- /dev/null
+++ b/flap/tests/02-Interpreter/04-arithmetic-04.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let x = 37 * 2
+let test = print_int (x)
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/04-arithmetic-04.expected b/flap/tests/02-Interpreter/04-arithmetic-04.expected
new file mode 100644
index 0000000..0aeb548
--- /dev/null
+++ b/flap/tests/02-Interpreter/04-arithmetic-04.expected
@@ -0,0 +1 @@
+74
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/05-arithmetic-05.eval.hopix b/flap/tests/02-Interpreter/05-arithmetic-05.eval.hopix
new file mode 100644
index 0000000..fd6ef86
--- /dev/null
+++ b/flap/tests/02-Interpreter/05-arithmetic-05.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id x))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Apply((value(Apply((value(Variable((value(Id `/`))(position((start_p(""1 0 11))(end_p(""1 0 12)))))()))(position((start_p(""1 0 11))(end_p(""1 0 12)))))((value(Literal((value(LInt 73))(position((start_p(""1 0 8))(end_p(""1 0 10)))))))(position((start_p(""1 0 8))(end_p(""1 0 10)))))))(position((start_p(""1 0 8))(end_p(""1 0 10)))))((value(Literal((value(LInt 2))(position((start_p(""1 0 13))(end_p(""1 0 14)))))))(position((start_p(""1 0 13))(end_p(""1 0 14)))))))(position((start_p(""1 0 8))(end_p(""1 0 14)))))))))(position((start_p(""1 0 0))(end_p(""1 0 14)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 15 19))(end_p(""2 15 23)))))()((value(Apply((value(Variable((value(Id print_int))(position((start_p(""2 15 26))(end_p(""2 15 35)))))()))(position((start_p(""2 15 26))(end_p(""2 15 35)))))((value(Variable((value(Id x))(position((start_p(""2 15 37))(end_p(""2 15 38)))))()))(position((start_p(""2 15 36))(end_p(""2 15 39)))))))(position((start_p(""2 15 26))(end_p(""2 15 39)))))))))(position((start_p(""2 15 15))(end_p(""2 15 39))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/05-arithmetic-05.eval.hopix.human-readable b/flap/tests/02-Interpreter/05-arithmetic-05.eval.hopix.human-readable
new file mode 100644
index 0000000..9b4891b
--- /dev/null
+++ b/flap/tests/02-Interpreter/05-arithmetic-05.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let x = 73 / 2
+let test = print_int (x)
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/05-arithmetic-05.expected b/flap/tests/02-Interpreter/05-arithmetic-05.expected
new file mode 100644
index 0000000..dce6588
--- /dev/null
+++ b/flap/tests/02-Interpreter/05-arithmetic-05.expected
@@ -0,0 +1 @@
+36
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/06-arithmetic-06.eval.hopix b/flap/tests/02-Interpreter/06-arithmetic-06.eval.hopix
new file mode 100644
index 0000000..b7c3b36
--- /dev/null
+++ b/flap/tests/02-Interpreter/06-arithmetic-06.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id wow))(position((start_p(""1 0 4))(end_p(""1 0 7)))))()((value(Apply((value(Apply((value(Variable((value(Id `+`))(position((start_p(""1 0 40))(end_p(""1 0 41)))))()))(position((start_p(""1 0 40))(end_p(""1 0 41)))))((value(Apply((value(Apply((value(Variable((value(Id `-`))(position((start_p(""1 0 32))(end_p(""1 0 33)))))()))(position((start_p(""1 0 32))(end_p(""1 0 33)))))((value(Apply((value(Apply((value(Variable((value(Id `-`))(position((start_p(""1 0 20))(end_p(""1 0 21)))))()))(position((start_p(""1 0 20))(end_p(""1 0 21)))))((value(Apply((value(Apply((value(Variable((value(Id `+`))(position((start_p(""1 0 12))(end_p(""1 0 13)))))()))(position((start_p(""1 0 12))(end_p(""1 0 13)))))((value(Literal((value(LInt 1))(position((start_p(""1 0 10))(end_p(""1 0 11)))))))(position((start_p(""1 0 10))(end_p(""1 0 11)))))))(position((start_p(""1 0 10))(end_p(""1 0 11)))))((value(Apply((value(Apply((value(Variable((value(Id `*`))(position((start_p(""1 0 16))(end_p(""1 0 17)))))()))(position((start_p(""1 0 16))(end_p(""1 0 17)))))((value(Literal((value(LInt 2))(position((start_p(""1 0 14))(end_p(""1 0 15)))))))(position((start_p(""1 0 14))(end_p(""1 0 15)))))))(position((start_p(""1 0 14))(end_p(""1 0 15)))))((value(Literal((value(LInt 3))(position((start_p(""1 0 18))(end_p(""1 0 19)))))))(position((start_p(""1 0 18))(end_p(""1 0 19)))))))(position((start_p(""1 0 14))(end_p(""1 0 19)))))))(position((start_p(""1 0 10))(end_p(""1 0 19)))))))(position((start_p(""1 0 10))(end_p(""1 0 19)))))((value(Apply((value(Apply((value(Variable((value(Id `*`))(position((start_p(""1 0 28))(end_p(""1 0 29)))))()))(position((start_p(""1 0 28))(end_p(""1 0 29)))))((value(Apply((value(Apply((value(Variable((value(Id `/`))(position((start_p(""1 0 24))(end_p(""1 0 25)))))()))(position((start_p(""1 0 24))(end_p(""1 0 25)))))((value(Literal((value(LInt 4))(position((start_p(""1 0 22))(end_p(""1 0 23)))))))(position((start_p(""1 0 22))(end_p(""1 0 23)))))))(position((start_p(""1 0 22))(end_p(""1 0 23)))))((value(Literal((value(LInt 5))(position((start_p(""1 0 26))(end_p(""1 0 27)))))))(position((start_p(""1 0 26))(end_p(""1 0 27)))))))(position((start_p(""1 0 22))(end_p(""1 0 27)))))))(position((start_p(""1 0 22))(end_p(""1 0 27)))))((value(Literal((value(LInt 6))(position((start_p(""1 0 30))(end_p(""1 0 31)))))))(position((start_p(""1 0 30))(end_p(""1 0 31)))))))(position((start_p(""1 0 22))(end_p(""1 0 31)))))))(position((start_p(""1 0 10))(end_p(""1 0 31)))))))(position((start_p(""1 0 10))(end_p(""1 0 31)))))((value(Apply((value(Apply((value(Variable((value(Id `*`))(position((start_p(""1 0 36))(end_p(""1 0 37)))))()))(position((start_p(""1 0 36))(end_p(""1 0 37)))))((value(Literal((value(LInt 7))(position((start_p(""1 0 34))(end_p(""1 0 35)))))))(position((start_p(""1 0 34))(end_p(""1 0 35)))))))(position((start_p(""1 0 34))(end_p(""1 0 35)))))((value(Literal((value(LInt 8))(position((start_p(""1 0 38))(end_p(""1 0 39)))))))(position((start_p(""1 0 38))(end_p(""1 0 39)))))))(position((start_p(""1 0 34))(end_p(""1 0 39)))))))(position((start_p(""1 0 10))(end_p(""1 0 39)))))))(position((start_p(""1 0 10))(end_p(""1 0 39)))))((value(Literal((value(LInt 9))(position((start_p(""1 0 42))(end_p(""1 0 43)))))))(position((start_p(""1 0 42))(end_p(""1 0 43)))))))(position((start_p(""1 0 10))(end_p(""1 0 43)))))))))(position((start_p(""1 0 0))(end_p(""1 0 43)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 44 48))(end_p(""2 44 52)))))()((value(Apply((value(Variable((value(Id print_int))(position((start_p(""2 44 55))(end_p(""2 44 64)))))()))(position((start_p(""2 44 55))(end_p(""2 44 64)))))((value(Variable((value(Id wow))(position((start_p(""2 44 66))(end_p(""2 44 69)))))()))(position((start_p(""2 44 65))(end_p(""2 44 70)))))))(position((start_p(""2 44 55))(end_p(""2 44 70)))))))))(position((start_p(""2 44 44))(end_p(""2 44 70))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/06-arithmetic-06.eval.hopix.human-readable b/flap/tests/02-Interpreter/06-arithmetic-06.eval.hopix.human-readable
new file mode 100644
index 0000000..fb99e7d
--- /dev/null
+++ b/flap/tests/02-Interpreter/06-arithmetic-06.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let wow = 1 + 2 * 3 - 4 / 5 * 6 - 7 * 8 + 9
+let test = print_int (wow)
diff --git a/flap/tests/02-Interpreter/06-arithmetic-06.expected b/flap/tests/02-Interpreter/06-arithmetic-06.expected
new file mode 100644
index 0000000..f64400d
--- /dev/null
+++ b/flap/tests/02-Interpreter/06-arithmetic-06.expected
@@ -0,0 +1 @@
+-40
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/07-arithmetic-07.eval.hopix b/flap/tests/02-Interpreter/07-arithmetic-07.eval.hopix
new file mode 100644
index 0000000..9903716
--- /dev/null
+++ b/flap/tests/02-Interpreter/07-arithmetic-07.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id overflow))(position((start_p(""1 0 4))(end_p(""1 0 12)))))()((value(Apply((value(Apply((value(Variable((value(Id `+`))(position((start_p(""1 0 39))(end_p(""1 0 40)))))()))(position((start_p(""1 0 39))(end_p(""1 0 40)))))((value(Apply((value(Apply((value(Variable((value(Id `*`))(position((start_p(""1 0 26))(end_p(""1 0 27)))))()))(position((start_p(""1 0 26))(end_p(""1 0 27)))))((value(Literal((value(LInt 4294967296))(position((start_p(""1 0 15))(end_p(""1 0 25)))))))(position((start_p(""1 0 15))(end_p(""1 0 25)))))))(position((start_p(""1 0 15))(end_p(""1 0 25)))))((value(Literal((value(LInt 4294967296))(position((start_p(""1 0 28))(end_p(""1 0 38)))))))(position((start_p(""1 0 28))(end_p(""1 0 38)))))))(position((start_p(""1 0 15))(end_p(""1 0 38)))))))(position((start_p(""1 0 15))(end_p(""1 0 38)))))((value(Literal((value(LInt 1))(position((start_p(""1 0 41))(end_p(""1 0 42)))))))(position((start_p(""1 0 41))(end_p(""1 0 42)))))))(position((start_p(""1 0 15))(end_p(""1 0 42)))))))))(position((start_p(""1 0 0))(end_p(""1 0 42)))))((value(DefineValue(SimpleValue(((value(Id main))(position((start_p(""2 43 47))(end_p(""2 43 51)))))()((value(Apply((value(Variable((value(Id print_int))(position((start_p(""2 43 54))(end_p(""2 43 63)))))()))(position((start_p(""2 43 54))(end_p(""2 43 63)))))((value(Variable((value(Id overflow))(position((start_p(""2 43 65))(end_p(""2 43 73)))))()))(position((start_p(""2 43 64))(end_p(""2 43 74)))))))(position((start_p(""2 43 54))(end_p(""2 43 74)))))))))(position((start_p(""2 43 43))(end_p(""2 43 74))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/07-arithmetic-07.eval.hopix.human-readable b/flap/tests/02-Interpreter/07-arithmetic-07.eval.hopix.human-readable
new file mode 100644
index 0000000..5bd22fe
--- /dev/null
+++ b/flap/tests/02-Interpreter/07-arithmetic-07.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let overflow = 4294967296 * 4294967296 + 1
+let main = print_int (overflow)
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/07-arithmetic-07.expected b/flap/tests/02-Interpreter/07-arithmetic-07.expected
new file mode 100644
index 0000000..56a6051
--- /dev/null
+++ b/flap/tests/02-Interpreter/07-arithmetic-07.expected
@@ -0,0 +1 @@
+1
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/08-arithmetic-08.eval.hopix b/flap/tests/02-Interpreter/08-arithmetic-08.eval.hopix
new file mode 100644
index 0000000..6cd5427
--- /dev/null
+++ b/flap/tests/02-Interpreter/08-arithmetic-08.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id overflow))(position((start_p(""1 0 4))(end_p(""1 0 12)))))()((value(Apply((value(Apply((value(Variable((value(Id `+`))(position((start_p(""1 0 45))(end_p(""1 0 46)))))()))(position((start_p(""1 0 45))(end_p(""1 0 46)))))((value(Apply((value(Apply((value(Variable((value(Id `*`))(position((start_p(""1 0 26))(end_p(""1 0 27)))))()))(position((start_p(""1 0 26))(end_p(""1 0 27)))))((value(Literal((value(LInt 4294967296))(position((start_p(""1 0 15))(end_p(""1 0 25)))))))(position((start_p(""1 0 15))(end_p(""1 0 25)))))))(position((start_p(""1 0 15))(end_p(""1 0 25)))))((value(Apply((value(Apply((value(Variable((value(Id `/`))(position((start_p(""1 0 40))(end_p(""1 0 41)))))()))(position((start_p(""1 0 40))(end_p(""1 0 41)))))((value(Literal((value(LInt 4294967296))(position((start_p(""1 0 29))(end_p(""1 0 39)))))))(position((start_p(""1 0 29))(end_p(""1 0 39)))))))(position((start_p(""1 0 29))(end_p(""1 0 39)))))((value(Literal((value(LInt 2))(position((start_p(""1 0 42))(end_p(""1 0 43)))))))(position((start_p(""1 0 42))(end_p(""1 0 43)))))))(position((start_p(""1 0 28))(end_p(""1 0 44)))))))(position((start_p(""1 0 15))(end_p(""1 0 44)))))))(position((start_p(""1 0 15))(end_p(""1 0 44)))))((value(Apply((value(Apply((value(Variable((value(Id `-`))(position((start_p(""1 0 78))(end_p(""1 0 79)))))()))(position((start_p(""1 0 78))(end_p(""1 0 79)))))((value(Apply((value(Apply((value(Variable((value(Id `*`))(position((start_p(""1 0 59))(end_p(""1 0 60)))))()))(position((start_p(""1 0 59))(end_p(""1 0 60)))))((value(Literal((value(LInt 4294967296))(position((start_p(""1 0 48))(end_p(""1 0 58)))))))(position((start_p(""1 0 48))(end_p(""1 0 58)))))))(position((start_p(""1 0 48))(end_p(""1 0 58)))))((value(Apply((value(Apply((value(Variable((value(Id `/`))(position((start_p(""1 0 73))(end_p(""1 0 74)))))()))(position((start_p(""1 0 73))(end_p(""1 0 74)))))((value(Literal((value(LInt 4294967296))(position((start_p(""1 0 62))(end_p(""1 0 72)))))))(position((start_p(""1 0 62))(end_p(""1 0 72)))))))(position((start_p(""1 0 62))(end_p(""1 0 72)))))((value(Literal((value(LInt 2))(position((start_p(""1 0 75))(end_p(""1 0 76)))))))(position((start_p(""1 0 75))(end_p(""1 0 76)))))))(position((start_p(""1 0 61))(end_p(""1 0 77)))))))(position((start_p(""1 0 48))(end_p(""1 0 77)))))))(position((start_p(""1 0 48))(end_p(""1 0 77)))))((value(Literal((value(LInt 1))(position((start_p(""1 0 80))(end_p(""1 0 81)))))))(position((start_p(""1 0 80))(end_p(""1 0 81)))))))(position((start_p(""1 0 47))(end_p(""1 0 82)))))))(position((start_p(""1 0 15))(end_p(""1 0 82)))))))))(position((start_p(""1 0 0))(end_p(""1 0 82)))))((value(DefineValue(SimpleValue(((value(Id main))(position((start_p(""2 83 87))(end_p(""2 83 91)))))()((value(Apply((value(Variable((value(Id print_int))(position((start_p(""2 83 94))(end_p(""2 83 103)))))()))(position((start_p(""2 83 94))(end_p(""2 83 103)))))((value(Variable((value(Id overflow))(position((start_p(""2 83 105))(end_p(""2 83 113)))))()))(position((start_p(""2 83 104))(end_p(""2 83 114)))))))(position((start_p(""2 83 94))(end_p(""2 83 114)))))))))(position((start_p(""2 83 83))(end_p(""2 83 114))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/08-arithmetic-08.eval.hopix.human-readable b/flap/tests/02-Interpreter/08-arithmetic-08.eval.hopix.human-readable
new file mode 100644
index 0000000..36eeb62
--- /dev/null
+++ b/flap/tests/02-Interpreter/08-arithmetic-08.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let overflow = 4294967296 * (4294967296 / 2) + (4294967296 * (4294967296 / 2) - 1)
+let main = print_int (overflow)
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/08-arithmetic-08.expected b/flap/tests/02-Interpreter/08-arithmetic-08.expected
new file mode 100644
index 0000000..d7d17fc
--- /dev/null
+++ b/flap/tests/02-Interpreter/08-arithmetic-08.expected
@@ -0,0 +1 @@
+-1
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/09-boolean-01.eval.hopix b/flap/tests/02-Interpreter/09-boolean-01.eval.hopix
new file mode 100644
index 0000000..d2605c0
--- /dev/null
+++ b/flap/tests/02-Interpreter/09-boolean-01.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id btrue))(position((start_p(""1 0 4))(end_p(""1 0 9)))))()((value(Variable((value(Id true))(position((start_p(""1 0 12))(end_p(""1 0 16)))))()))(position((start_p(""1 0 12))(end_p(""1 0 16)))))))))(position((start_p(""1 0 0))(end_p(""1 0 16)))))((value(DefineValue(SimpleValue(((value(Id bfalse))(position((start_p(""2 17 21))(end_p(""2 17 27)))))()((value(Variable((value(Id false))(position((start_p(""2 17 30))(end_p(""2 17 35)))))()))(position((start_p(""2 17 30))(end_p(""2 17 35)))))))))(position((start_p(""2 17 17))(end_p(""2 17 35)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""3 36 40))(end_p(""3 36 44)))))()((value(Apply((value(Variable((value(Id print_string))(position((start_p(""3 36 47))(end_p(""3 36 59)))))()))(position((start_p(""3 36 47))(end_p(""3 36 59)))))((value(Literal((value(LString"OK\n"))(position((start_p(""3 36 66))(end_p(""3 36 67)))))))(position((start_p(""3 36 60))(end_p(""3 36 68)))))))(position((start_p(""3 36 47))(end_p(""3 36 68)))))))))(position((start_p(""3 36 36))(end_p(""3 36 68))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/09-boolean-01.eval.hopix.human-readable b/flap/tests/02-Interpreter/09-boolean-01.eval.hopix.human-readable
new file mode 100644
index 0000000..b2d9eaf
--- /dev/null
+++ b/flap/tests/02-Interpreter/09-boolean-01.eval.hopix.human-readable
@@ -0,0 +1,3 @@
+let btrue = true
+let bfalse = false
+let test = print_string ("OK\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/09-boolean-01.expected b/flap/tests/02-Interpreter/09-boolean-01.expected
new file mode 100644
index 0000000..d86bac9
--- /dev/null
+++ b/flap/tests/02-Interpreter/09-boolean-01.expected
@@ -0,0 +1 @@
+OK
diff --git a/flap/tests/02-Interpreter/10-boolean-02.eval.hopix b/flap/tests/02-Interpreter/10-boolean-02.eval.hopix
new file mode 100644
index 0000000..650b9d8
--- /dev/null
+++ b/flap/tests/02-Interpreter/10-boolean-02.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id b))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Variable((value(Id true))(position((start_p(""1 0 8))(end_p(""1 0 12)))))()))(position((start_p(""1 0 8))(end_p(""1 0 12)))))))))(position((start_p(""1 0 0))(end_p(""1 0 12)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 13 17))(end_p(""2 13 21)))))()((value(IfThenElse((value(Variable((value(Id b))(position((start_p(""2 13 28))(end_p(""2 13 29)))))()))(position((start_p(""2 13 27))(end_p(""2 13 30)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 13 38))(end_p(""2 13 50)))))()))(position((start_p(""2 13 38))(end_p(""2 13 50)))))((value(Literal((value(LString"OK\n"))(position((start_p(""2 13 57))(end_p(""2 13 58)))))))(position((start_p(""2 13 51))(end_p(""2 13 59)))))))(position((start_p(""2 13 38))(end_p(""2 13 59)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 13 69))(end_p(""2 13 81)))))()))(position((start_p(""2 13 69))(end_p(""2 13 81)))))((value(Literal((value(LString"KO\n"))(position((start_p(""2 13 88))(end_p(""2 13 89)))))))(position((start_p(""2 13 82))(end_p(""2 13 90)))))))(position((start_p(""2 13 69))(end_p(""2 13 90)))))))(position((start_p(""2 13 24))(end_p(""2 13 92)))))))))(position((start_p(""2 13 13))(end_p(""2 13 92))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/10-boolean-02.eval.hopix.human-readable b/flap/tests/02-Interpreter/10-boolean-02.eval.hopix.human-readable
new file mode 100644
index 0000000..1b50c7e
--- /dev/null
+++ b/flap/tests/02-Interpreter/10-boolean-02.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let b = true
+let test = if (b) then { print_string ("OK\n") } else { print_string ("KO\n") }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/10-boolean-02.expected b/flap/tests/02-Interpreter/10-boolean-02.expected
new file mode 100644
index 0000000..d86bac9
--- /dev/null
+++ b/flap/tests/02-Interpreter/10-boolean-02.expected
@@ -0,0 +1 @@
+OK
diff --git a/flap/tests/02-Interpreter/11-boolean-03.eval.hopix b/flap/tests/02-Interpreter/11-boolean-03.eval.hopix
new file mode 100644
index 0000000..1864506
--- /dev/null
+++ b/flap/tests/02-Interpreter/11-boolean-03.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id b))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Apply((value(Apply((value(Variable((value(Id `=?`))(position((start_p(""1 0 11))(end_p(""1 0 13)))))()))(position((start_p(""1 0 11))(end_p(""1 0 13)))))((value(Literal((value(LInt 0))(position((start_p(""1 0 9))(end_p(""1 0 10)))))))(position((start_p(""1 0 9))(end_p(""1 0 10)))))))(position((start_p(""1 0 9))(end_p(""1 0 10)))))((value(Literal((value(LInt 0))(position((start_p(""1 0 14))(end_p(""1 0 15)))))))(position((start_p(""1 0 14))(end_p(""1 0 15)))))))(position((start_p(""1 0 8))(end_p(""1 0 16)))))))))(position((start_p(""1 0 0))(end_p(""1 0 16)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 17 21))(end_p(""2 17 25)))))()((value(IfThenElse((value(Variable((value(Id b))(position((start_p(""2 17 32))(end_p(""2 17 33)))))()))(position((start_p(""2 17 31))(end_p(""2 17 34)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 17 42))(end_p(""2 17 54)))))()))(position((start_p(""2 17 42))(end_p(""2 17 54)))))((value(Literal((value(LString"TOTO\n"))(position((start_p(""2 17 63))(end_p(""2 17 64)))))))(position((start_p(""2 17 55))(end_p(""2 17 65)))))))(position((start_p(""2 17 42))(end_p(""2 17 65)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 17 75))(end_p(""2 17 87)))))()))(position((start_p(""2 17 75))(end_p(""2 17 87)))))((value(Literal((value(LString"KO\n"))(position((start_p(""2 17 94))(end_p(""2 17 95)))))))(position((start_p(""2 17 88))(end_p(""2 17 96)))))))(position((start_p(""2 17 75))(end_p(""2 17 96)))))))(position((start_p(""2 17 28))(end_p(""2 17 98)))))))))(position((start_p(""2 17 17))(end_p(""2 17 98))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/11-boolean-03.eval.hopix.human-readable b/flap/tests/02-Interpreter/11-boolean-03.eval.hopix.human-readable
new file mode 100644
index 0000000..26731ae
--- /dev/null
+++ b/flap/tests/02-Interpreter/11-boolean-03.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let b = (0 =? 0)
+let test = if (b) then { print_string ("TOTO\n") } else { print_string ("KO\n") }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/11-boolean-03.expected b/flap/tests/02-Interpreter/11-boolean-03.expected
new file mode 100644
index 0000000..379e8b0
--- /dev/null
+++ b/flap/tests/02-Interpreter/11-boolean-03.expected
@@ -0,0 +1 @@
+TOTO
diff --git a/flap/tests/02-Interpreter/12-boolean-04.eval.hopix b/flap/tests/02-Interpreter/12-boolean-04.eval.hopix
new file mode 100644
index 0000000..5024a07
--- /dev/null
+++ b/flap/tests/02-Interpreter/12-boolean-04.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id b))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Apply((value(Apply((value(Variable((value(Id `<?`))(position((start_p(""1 0 11))(end_p(""1 0 13)))))()))(position((start_p(""1 0 11))(end_p(""1 0 13)))))((value(Literal((value(LInt 0))(position((start_p(""1 0 9))(end_p(""1 0 10)))))))(position((start_p(""1 0 9))(end_p(""1 0 10)))))))(position((start_p(""1 0 9))(end_p(""1 0 10)))))((value(Literal((value(LInt 0))(position((start_p(""1 0 14))(end_p(""1 0 15)))))))(position((start_p(""1 0 14))(end_p(""1 0 15)))))))(position((start_p(""1 0 8))(end_p(""1 0 16)))))))))(position((start_p(""1 0 0))(end_p(""1 0 16)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 17 21))(end_p(""2 17 25)))))()((value(IfThenElse((value(Variable((value(Id b))(position((start_p(""2 17 32))(end_p(""2 17 33)))))()))(position((start_p(""2 17 31))(end_p(""2 17 34)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 17 42))(end_p(""2 17 54)))))()))(position((start_p(""2 17 42))(end_p(""2 17 54)))))((value(Literal((value(LString"TOTO\n"))(position((start_p(""2 17 63))(end_p(""2 17 64)))))))(position((start_p(""2 17 55))(end_p(""2 17 65)))))))(position((start_p(""2 17 42))(end_p(""2 17 65)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 17 75))(end_p(""2 17 87)))))()))(position((start_p(""2 17 75))(end_p(""2 17 87)))))((value(Literal((value(LString"BIRD\n"))(position((start_p(""2 17 96))(end_p(""2 17 97)))))))(position((start_p(""2 17 88))(end_p(""2 17 98)))))))(position((start_p(""2 17 75))(end_p(""2 17 98)))))))(position((start_p(""2 17 28))(end_p(""2 17 100)))))))))(position((start_p(""2 17 17))(end_p(""2 17 100))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/12-boolean-04.eval.hopix.human-readable b/flap/tests/02-Interpreter/12-boolean-04.eval.hopix.human-readable
new file mode 100644
index 0000000..76c4db2
--- /dev/null
+++ b/flap/tests/02-Interpreter/12-boolean-04.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let b = (0 <? 0)
+let test = if (b) then { print_string ("TOTO\n") } else { print_string ("BIRD\n") }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/12-boolean-04.expected b/flap/tests/02-Interpreter/12-boolean-04.expected
new file mode 100644
index 0000000..a62c37b
--- /dev/null
+++ b/flap/tests/02-Interpreter/12-boolean-04.expected
@@ -0,0 +1 @@
+BIRD
diff --git a/flap/tests/02-Interpreter/13-boolean-05.eval.hopix b/flap/tests/02-Interpreter/13-boolean-05.eval.hopix
new file mode 100644
index 0000000..799c1ea
--- /dev/null
+++ b/flap/tests/02-Interpreter/13-boolean-05.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id b))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Apply((value(Apply((value(Variable((value(Id `&&`))(position((start_p(""1 0 17))(end_p(""1 0 19)))))()))(position((start_p(""1 0 17))(end_p(""1 0 19)))))((value(Apply((value(Apply((value(Variable((value(Id `<?`))(position((start_p(""1 0 11))(end_p(""1 0 13)))))()))(position((start_p(""1 0 11))(end_p(""1 0 13)))))((value(Literal((value(LInt 0))(position((start_p(""1 0 9))(end_p(""1 0 10)))))))(position((start_p(""1 0 9))(end_p(""1 0 10)))))))(position((start_p(""1 0 9))(end_p(""1 0 10)))))((value(Literal((value(LInt 0))(position((start_p(""1 0 14))(end_p(""1 0 15)))))))(position((start_p(""1 0 14))(end_p(""1 0 15)))))))(position((start_p(""1 0 8))(end_p(""1 0 16)))))))(position((start_p(""1 0 8))(end_p(""1 0 16)))))((value(Variable((value(Id true))(position((start_p(""1 0 20))(end_p(""1 0 24)))))()))(position((start_p(""1 0 20))(end_p(""1 0 24)))))))(position((start_p(""1 0 8))(end_p(""1 0 24)))))))))(position((start_p(""1 0 0))(end_p(""1 0 24)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 25 29))(end_p(""2 25 33)))))()((value(IfThenElse((value(Variable((value(Id b))(position((start_p(""2 25 40))(end_p(""2 25 41)))))()))(position((start_p(""2 25 39))(end_p(""2 25 42)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 25 50))(end_p(""2 25 62)))))()))(position((start_p(""2 25 50))(end_p(""2 25 62)))))((value(Literal((value(LString"TOTO\n"))(position((start_p(""2 25 71))(end_p(""2 25 72)))))))(position((start_p(""2 25 63))(end_p(""2 25 73)))))))(position((start_p(""2 25 50))(end_p(""2 25 73)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 25 83))(end_p(""2 25 95)))))()))(position((start_p(""2 25 83))(end_p(""2 25 95)))))((value(Literal((value(LString"BIRD\n"))(position((start_p(""2 25 104))(end_p(""2 25 105)))))))(position((start_p(""2 25 96))(end_p(""2 25 106)))))))(position((start_p(""2 25 83))(end_p(""2 25 106)))))))(position((start_p(""2 25 36))(end_p(""2 25 108)))))))))(position((start_p(""2 25 25))(end_p(""2 25 108))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/13-boolean-05.eval.hopix.human-readable b/flap/tests/02-Interpreter/13-boolean-05.eval.hopix.human-readable
new file mode 100644
index 0000000..64cf313
--- /dev/null
+++ b/flap/tests/02-Interpreter/13-boolean-05.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let b = (0 <? 0) && true
+let test = if (b) then { print_string ("TOTO\n") } else { print_string ("BIRD\n") }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/13-boolean-05.expected b/flap/tests/02-Interpreter/13-boolean-05.expected
new file mode 100644
index 0000000..a62c37b
--- /dev/null
+++ b/flap/tests/02-Interpreter/13-boolean-05.expected
@@ -0,0 +1 @@
+BIRD
diff --git a/flap/tests/02-Interpreter/14-string-01.eval.hopix b/flap/tests/02-Interpreter/14-string-01.eval.hopix
new file mode 100644
index 0000000..3c42cf2
--- /dev/null
+++ b/flap/tests/02-Interpreter/14-string-01.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id some_string))(position((start_p(""1 0 4))(end_p(""1 0 15)))))()((value(Literal((value(LString"Easy as a pie!\n"))(position((start_p(""1 0 35))(end_p(""1 0 36)))))))(position((start_p(""1 0 35))(end_p(""1 0 36)))))))))(position((start_p(""1 0 0))(end_p(""1 0 36)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 37 41))(end_p(""2 37 45)))))()((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 37 48))(end_p(""2 37 60)))))()))(position((start_p(""2 37 48))(end_p(""2 37 60)))))((value(Variable((value(Id some_string))(position((start_p(""2 37 62))(end_p(""2 37 73)))))()))(position((start_p(""2 37 61))(end_p(""2 37 74)))))))(position((start_p(""2 37 48))(end_p(""2 37 74)))))))))(position((start_p(""2 37 37))(end_p(""2 37 74))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/14-string-01.eval.hopix.human-readable b/flap/tests/02-Interpreter/14-string-01.eval.hopix.human-readable
new file mode 100644
index 0000000..86f921f
--- /dev/null
+++ b/flap/tests/02-Interpreter/14-string-01.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let some_string = "Easy as a pie!\n"
+let test = print_string (some_string)
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/14-string-01.expected b/flap/tests/02-Interpreter/14-string-01.expected
new file mode 100644
index 0000000..c804218
--- /dev/null
+++ b/flap/tests/02-Interpreter/14-string-01.expected
@@ -0,0 +1 @@
+Easy as a pie!
diff --git a/flap/tests/02-Interpreter/15-constructor-01.eval.hopix b/flap/tests/02-Interpreter/15-constructor-01.eval.hopix
new file mode 100644
index 0000000..196a2a4
--- /dev/null
+++ b/flap/tests/02-Interpreter/15-constructor-01.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id s))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Tagged((value(KId S))(position((start_p(""1 0 8))(end_p(""1 0 9)))))()()))(position((start_p(""1 0 8))(end_p(""1 0 9)))))))))(position((start_p(""1 0 0))(end_p(""1 0 9)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 10 14))(end_p(""2 10 18)))))()((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 10 21))(end_p(""2 10 33)))))()))(position((start_p(""2 10 21))(end_p(""2 10 33)))))((value(Literal((value(LString"Construction succeeds.\n"))(position((start_p(""2 10 60))(end_p(""2 10 61)))))))(position((start_p(""2 10 34))(end_p(""2 10 62)))))))(position((start_p(""2 10 21))(end_p(""2 10 62)))))))))(position((start_p(""2 10 10))(end_p(""2 10 62))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/15-constructor-01.eval.hopix.human-readable b/flap/tests/02-Interpreter/15-constructor-01.eval.hopix.human-readable
new file mode 100644
index 0000000..e6b743a
--- /dev/null
+++ b/flap/tests/02-Interpreter/15-constructor-01.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let s = S
+let test = print_string ("Construction succeeds.\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/15-constructor-01.expected b/flap/tests/02-Interpreter/15-constructor-01.expected
new file mode 100644
index 0000000..c8daade
--- /dev/null
+++ b/flap/tests/02-Interpreter/15-constructor-01.expected
@@ -0,0 +1 @@
+Construction succeeds.
diff --git a/flap/tests/02-Interpreter/16-constructor-02.eval.hopix b/flap/tests/02-Interpreter/16-constructor-02.eval.hopix
new file mode 100644
index 0000000..4defcd1
--- /dev/null
+++ b/flap/tests/02-Interpreter/16-constructor-02.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id s))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Tagged((value(KId S))(position((start_p(""1 0 8))(end_p(""1 0 9)))))()(((value(Literal((value(LInt 0))(position((start_p(""1 0 11))(end_p(""1 0 12)))))))(position((start_p(""1 0 11))(end_p(""1 0 12))))))))(position((start_p(""1 0 8))(end_p(""1 0 13)))))))))(position((start_p(""1 0 0))(end_p(""1 0 13)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 14 18))(end_p(""2 14 22)))))()((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 14 25))(end_p(""2 14 37)))))()))(position((start_p(""2 14 25))(end_p(""2 14 37)))))((value(Literal((value(LString"Construction succeeds.\n"))(position((start_p(""2 14 64))(end_p(""2 14 65)))))))(position((start_p(""2 14 38))(end_p(""2 14 66)))))))(position((start_p(""2 14 25))(end_p(""2 14 66)))))))))(position((start_p(""2 14 14))(end_p(""2 14 66))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/16-constructor-02.eval.hopix.human-readable b/flap/tests/02-Interpreter/16-constructor-02.eval.hopix.human-readable
new file mode 100644
index 0000000..7303293
--- /dev/null
+++ b/flap/tests/02-Interpreter/16-constructor-02.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let s = S (0)
+let test = print_string ("Construction succeeds.\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/16-constructor-02.expected b/flap/tests/02-Interpreter/16-constructor-02.expected
new file mode 100644
index 0000000..c8daade
--- /dev/null
+++ b/flap/tests/02-Interpreter/16-constructor-02.expected
@@ -0,0 +1 @@
+Construction succeeds.
diff --git a/flap/tests/02-Interpreter/17-constructor-03.eval.hopix b/flap/tests/02-Interpreter/17-constructor-03.eval.hopix
new file mode 100644
index 0000000..bb02a8a
--- /dev/null
+++ b/flap/tests/02-Interpreter/17-constructor-03.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id s))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Tagged((value(KId S))(position((start_p(""1 0 8))(end_p(""1 0 9)))))()(((value(Literal((value(LInt 0))(position((start_p(""1 0 11))(end_p(""1 0 12)))))))(position((start_p(""1 0 11))(end_p(""1 0 12)))))((value(Literal((value(LString FooBaR))(position((start_p(""1 0 21))(end_p(""1 0 22)))))))(position((start_p(""1 0 21))(end_p(""1 0 22))))))))(position((start_p(""1 0 8))(end_p(""1 0 23)))))))))(position((start_p(""1 0 0))(end_p(""1 0 23)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 24 28))(end_p(""2 24 32)))))()((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 24 35))(end_p(""2 24 47)))))()))(position((start_p(""2 24 35))(end_p(""2 24 47)))))((value(Literal((value(LString"Construction succeeds.\n"))(position((start_p(""2 24 74))(end_p(""2 24 75)))))))(position((start_p(""2 24 48))(end_p(""2 24 76)))))))(position((start_p(""2 24 35))(end_p(""2 24 76)))))))))(position((start_p(""2 24 24))(end_p(""2 24 76))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/17-constructor-03.eval.hopix.human-readable b/flap/tests/02-Interpreter/17-constructor-03.eval.hopix.human-readable
new file mode 100644
index 0000000..fb88ca3
--- /dev/null
+++ b/flap/tests/02-Interpreter/17-constructor-03.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let s = S (0, "FooBaR")
+let test = print_string ("Construction succeeds.\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/17-constructor-03.expected b/flap/tests/02-Interpreter/17-constructor-03.expected
new file mode 100644
index 0000000..c8daade
--- /dev/null
+++ b/flap/tests/02-Interpreter/17-constructor-03.expected
@@ -0,0 +1 @@
+Construction succeeds.
diff --git a/flap/tests/02-Interpreter/18-constructor-04.eval.hopix b/flap/tests/02-Interpreter/18-constructor-04.eval.hopix
new file mode 100644
index 0000000..ba5bcd3
--- /dev/null
+++ b/flap/tests/02-Interpreter/18-constructor-04.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id nil))(position((start_p(""1 0 4))(end_p(""1 0 7)))))()((value(Tagged((value(KId Nil))(position((start_p(""1 0 10))(end_p(""1 0 13)))))()()))(position((start_p(""1 0 10))(end_p(""1 0 13)))))))))(position((start_p(""1 0 0))(end_p(""1 0 13)))))((value(DefineValue(SimpleValue(((value(Id l1))(position((start_p(""2 14 18))(end_p(""2 14 20)))))()((value(Tagged((value(KId Cons))(position((start_p(""2 14 23))(end_p(""2 14 27)))))()(((value(Literal((value(LInt 0))(position((start_p(""2 14 29))(end_p(""2 14 30)))))))(position((start_p(""2 14 29))(end_p(""2 14 30)))))((value(Variable((value(Id nil))(position((start_p(""2 14 32))(end_p(""2 14 35)))))()))(position((start_p(""2 14 32))(end_p(""2 14 35))))))))(position((start_p(""2 14 23))(end_p(""2 14 36)))))))))(position((start_p(""2 14 14))(end_p(""2 14 36)))))((value(DefineValue(SimpleValue(((value(Id l2))(position((start_p(""3 37 41))(end_p(""3 37 43)))))()((value(Tagged((value(KId Cons))(position((start_p(""3 37 46))(end_p(""3 37 50)))))()(((value(Literal((value(LInt 1))(position((start_p(""3 37 52))(end_p(""3 37 53)))))))(position((start_p(""3 37 52))(end_p(""3 37 53)))))((value(Variable((value(Id l1))(position((start_p(""3 37 55))(end_p(""3 37 57)))))()))(position((start_p(""3 37 55))(end_p(""3 37 57))))))))(position((start_p(""3 37 46))(end_p(""3 37 58)))))))))(position((start_p(""3 37 37))(end_p(""3 37 58)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""4 59 63))(end_p(""4 59 67)))))()((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 59 70))(end_p(""4 59 82)))))()))(position((start_p(""4 59 70))(end_p(""4 59 82)))))((value(Literal((value(LString"Construction succeeds.\n"))(position((start_p(""4 59 109))(end_p(""4 59 110)))))))(position((start_p(""4 59 83))(end_p(""4 59 111)))))))(position((start_p(""4 59 70))(end_p(""4 59 111)))))))))(position((start_p(""4 59 59))(end_p(""4 59 111))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/18-constructor-04.eval.hopix.human-readable b/flap/tests/02-Interpreter/18-constructor-04.eval.hopix.human-readable
new file mode 100644
index 0000000..0784ccd
--- /dev/null
+++ b/flap/tests/02-Interpreter/18-constructor-04.eval.hopix.human-readable
@@ -0,0 +1,4 @@
+let nil = Nil
+let l1 = Cons (0, nil)
+let l2 = Cons (1, l1)
+let test = print_string ("Construction succeeds.\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/18-constructor-04.expected b/flap/tests/02-Interpreter/18-constructor-04.expected
new file mode 100644
index 0000000..c8daade
--- /dev/null
+++ b/flap/tests/02-Interpreter/18-constructor-04.expected
@@ -0,0 +1 @@
+Construction succeeds.
diff --git a/flap/tests/02-Interpreter/19-record-01.eval.hopix b/flap/tests/02-Interpreter/19-record-01.eval.hopix
new file mode 100644
index 0000000..83ff2c9
--- /dev/null
+++ b/flap/tests/02-Interpreter/19-record-01.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id t))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Record((((value(LId x))(position((start_p(""1 0 10))(end_p(""1 0 11)))))((value(Literal((value(LInt 1))(position((start_p(""1 0 14))(end_p(""1 0 15)))))))(position((start_p(""1 0 14))(end_p(""1 0 15)))))))()))(position((start_p(""1 0 8))(end_p(""1 0 17)))))))))(position((start_p(""1 0 0))(end_p(""1 0 17)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 18 22))(end_p(""2 18 26)))))()((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 18 29))(end_p(""2 18 41)))))()))(position((start_p(""2 18 29))(end_p(""2 18 41)))))((value(Literal((value(LString"Recording succeeds.\n"))(position((start_p(""2 18 65))(end_p(""2 18 66)))))))(position((start_p(""2 18 42))(end_p(""2 18 67)))))))(position((start_p(""2 18 29))(end_p(""2 18 67)))))))))(position((start_p(""2 18 18))(end_p(""2 18 67))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/19-record-01.eval.hopix.human-readable b/flap/tests/02-Interpreter/19-record-01.eval.hopix.human-readable
new file mode 100644
index 0000000..08e5034
--- /dev/null
+++ b/flap/tests/02-Interpreter/19-record-01.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let t = { x = 1 }
+let test = print_string ("Recording succeeds.\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/19-record-01.expected b/flap/tests/02-Interpreter/19-record-01.expected
new file mode 100644
index 0000000..df04934
--- /dev/null
+++ b/flap/tests/02-Interpreter/19-record-01.expected
@@ -0,0 +1 @@
+Recording succeeds.
diff --git a/flap/tests/02-Interpreter/20-record-02.eval.hopix b/flap/tests/02-Interpreter/20-record-02.eval.hopix
new file mode 100644
index 0000000..215078b
--- /dev/null
+++ b/flap/tests/02-Interpreter/20-record-02.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id t))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Record((((value(LId x))(position((start_p(""1 0 10))(end_p(""1 0 11)))))((value(Literal((value(LInt 1))(position((start_p(""1 0 14))(end_p(""1 0 15)))))))(position((start_p(""1 0 14))(end_p(""1 0 15))))))(((value(LId y))(position((start_p(""1 0 17))(end_p(""1 0 18)))))((value(Literal((value(LString FooBaR))(position((start_p(""1 0 28))(end_p(""1 0 29)))))))(position((start_p(""1 0 28))(end_p(""1 0 29)))))))()))(position((start_p(""1 0 8))(end_p(""1 0 31)))))))))(position((start_p(""1 0 0))(end_p(""1 0 31)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 32 36))(end_p(""2 32 40)))))()((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 32 43))(end_p(""2 32 55)))))()))(position((start_p(""2 32 43))(end_p(""2 32 55)))))((value(Literal((value(LString"Recording succeeds.\n"))(position((start_p(""2 32 79))(end_p(""2 32 80)))))))(position((start_p(""2 32 56))(end_p(""2 32 81)))))))(position((start_p(""2 32 43))(end_p(""2 32 81)))))))))(position((start_p(""2 32 32))(end_p(""2 32 81))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/20-record-02.eval.hopix.human-readable b/flap/tests/02-Interpreter/20-record-02.eval.hopix.human-readable
new file mode 100644
index 0000000..25e44a9
--- /dev/null
+++ b/flap/tests/02-Interpreter/20-record-02.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let t = { x = 1, y = "FooBaR" }
+let test = print_string ("Recording succeeds.\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/20-record-02.expected b/flap/tests/02-Interpreter/20-record-02.expected
new file mode 100644
index 0000000..df04934
--- /dev/null
+++ b/flap/tests/02-Interpreter/20-record-02.expected
@@ -0,0 +1 @@
+Recording succeeds.
diff --git a/flap/tests/02-Interpreter/21-record-03.eval.hopix b/flap/tests/02-Interpreter/21-record-03.eval.hopix
new file mode 100644
index 0000000..0f4891b
--- /dev/null
+++ b/flap/tests/02-Interpreter/21-record-03.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id t))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Record((((value(LId x))(position((start_p(""1 0 10))(end_p(""1 0 11)))))((value(Literal((value(LInt 1))(position((start_p(""1 0 14))(end_p(""1 0 15)))))))(position((start_p(""1 0 14))(end_p(""1 0 15))))))(((value(LId y))(position((start_p(""1 0 17))(end_p(""1 0 18)))))((value(Literal((value(LString FooBaR))(position((start_p(""1 0 28))(end_p(""1 0 29)))))))(position((start_p(""1 0 28))(end_p(""1 0 29)))))))()))(position((start_p(""1 0 8))(end_p(""1 0 31)))))))))(position((start_p(""1 0 0))(end_p(""1 0 31)))))((value(DefineValue(SimpleValue(((value(Id u))(position((start_p(""2 32 36))(end_p(""2 32 37)))))()((value(Record((((value(LId z))(position((start_p(""2 32 42))(end_p(""2 32 43)))))((value(Variable((value(Id t))(position((start_p(""2 32 46))(end_p(""2 32 47)))))()))(position((start_p(""2 32 46))(end_p(""2 32 47))))))(((value(LId some_more))(position((start_p(""2 32 49))(end_p(""2 32 58)))))((value(Variable((value(Id t))(position((start_p(""2 32 61))(end_p(""2 32 62)))))()))(position((start_p(""2 32 61))(end_p(""2 32 62)))))))()))(position((start_p(""2 32 40))(end_p(""2 32 64)))))))))(position((start_p(""2 32 32))(end_p(""2 32 64)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""3 65 69))(end_p(""3 65 73)))))()((value(Apply((value(Variable((value(Id print_string))(position((start_p(""3 65 76))(end_p(""3 65 88)))))()))(position((start_p(""3 65 76))(end_p(""3 65 88)))))((value(Literal((value(LString"Recording succeeds.\n"))(position((start_p(""3 65 112))(end_p(""3 65 113)))))))(position((start_p(""3 65 89))(end_p(""3 65 114)))))))(position((start_p(""3 65 76))(end_p(""3 65 114)))))))))(position((start_p(""3 65 65))(end_p(""3 65 114))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/21-record-03.eval.hopix.human-readable b/flap/tests/02-Interpreter/21-record-03.eval.hopix.human-readable
new file mode 100644
index 0000000..4d3b1cd
--- /dev/null
+++ b/flap/tests/02-Interpreter/21-record-03.eval.hopix.human-readable
@@ -0,0 +1,3 @@
+let t = { x = 1, y = "FooBaR" }
+let u = { z = t, some_more = t }
+let test = print_string ("Recording succeeds.\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/21-record-03.expected b/flap/tests/02-Interpreter/21-record-03.expected
new file mode 100644
index 0000000..df04934
--- /dev/null
+++ b/flap/tests/02-Interpreter/21-record-03.expected
@@ -0,0 +1 @@
+Recording succeeds.
diff --git a/flap/tests/02-Interpreter/22-field-01.eval.hopix b/flap/tests/02-Interpreter/22-field-01.eval.hopix
new file mode 100644
index 0000000..fcf24bc
--- /dev/null
+++ b/flap/tests/02-Interpreter/22-field-01.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id t))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Record((((value(LId x))(position((start_p(""1 0 10))(end_p(""1 0 11)))))((value(Literal((value(LString"Field extraction is a success!\n"))(position((start_p(""1 0 47))(end_p(""1 0 48)))))))(position((start_p(""1 0 47))(end_p(""1 0 48)))))))()))(position((start_p(""1 0 8))(end_p(""1 0 50)))))))))(position((start_p(""1 0 0))(end_p(""1 0 50)))))((value(DefineValue(SimpleValue(((value(Id z))(position((start_p(""2 51 55))(end_p(""2 51 56)))))()((value(Field((value(Variable((value(Id t))(position((start_p(""2 51 59))(end_p(""2 51 60)))))()))(position((start_p(""2 51 59))(end_p(""2 51 60)))))((value(LId x))(position((start_p(""2 51 61))(end_p(""2 51 62)))))()))(position((start_p(""2 51 59))(end_p(""2 51 62)))))))))(position((start_p(""2 51 51))(end_p(""2 51 62)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""3 63 67))(end_p(""3 63 71)))))()((value(Apply((value(Variable((value(Id print_string))(position((start_p(""3 63 74))(end_p(""3 63 86)))))()))(position((start_p(""3 63 74))(end_p(""3 63 86)))))((value(Variable((value(Id z))(position((start_p(""3 63 88))(end_p(""3 63 89)))))()))(position((start_p(""3 63 87))(end_p(""3 63 90)))))))(position((start_p(""3 63 74))(end_p(""3 63 90)))))))))(position((start_p(""3 63 63))(end_p(""3 63 90))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/22-field-01.eval.hopix.human-readable b/flap/tests/02-Interpreter/22-field-01.eval.hopix.human-readable
new file mode 100644
index 0000000..aef654c
--- /dev/null
+++ b/flap/tests/02-Interpreter/22-field-01.eval.hopix.human-readable
@@ -0,0 +1,3 @@
+let t = { x = "Field extraction is a success!\n" }
+let z = t.x
+let test = print_string (z)
diff --git a/flap/tests/02-Interpreter/22-field-01.expected b/flap/tests/02-Interpreter/22-field-01.expected
new file mode 100644
index 0000000..701c619
--- /dev/null
+++ b/flap/tests/02-Interpreter/22-field-01.expected
@@ -0,0 +1 @@
+Field extraction is a success!
diff --git a/flap/tests/02-Interpreter/23-field-02.eval.hopix b/flap/tests/02-Interpreter/23-field-02.eval.hopix
new file mode 100644
index 0000000..1c59d0c
--- /dev/null
+++ b/flap/tests/02-Interpreter/23-field-02.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id t))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Record((((value(LId a))(position((start_p(""1 0 10))(end_p(""1 0 11)))))((value(Literal((value(LString 0))(position((start_p(""1 0 16))(end_p(""1 0 17)))))))(position((start_p(""1 0 16))(end_p(""1 0 17))))))(((value(LId x))(position((start_p(""1 0 19))(end_p(""1 0 20)))))((value(Literal((value(LString"Field extraction is still a success!\n"))(position((start_p(""1 0 62))(end_p(""1 0 63)))))))(position((start_p(""1 0 62))(end_p(""1 0 63))))))(((value(LId y))(position((start_p(""1 0 65))(end_p(""1 0 66)))))((value(Literal((value(LInt 31))(position((start_p(""1 0 69))(end_p(""1 0 71)))))))(position((start_p(""1 0 69))(end_p(""1 0 71)))))))()))(position((start_p(""1 0 8))(end_p(""1 0 73)))))))))(position((start_p(""1 0 0))(end_p(""1 0 73)))))((value(DefineValue(SimpleValue(((value(Id z))(position((start_p(""2 74 78))(end_p(""2 74 79)))))()((value(Field((value(Variable((value(Id t))(position((start_p(""2 74 82))(end_p(""2 74 83)))))()))(position((start_p(""2 74 82))(end_p(""2 74 83)))))((value(LId x))(position((start_p(""2 74 84))(end_p(""2 74 85)))))()))(position((start_p(""2 74 82))(end_p(""2 74 85)))))))))(position((start_p(""2 74 74))(end_p(""2 74 85)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""3 86 90))(end_p(""3 86 94)))))()((value(Apply((value(Variable((value(Id print_string))(position((start_p(""3 86 97))(end_p(""3 86 109)))))()))(position((start_p(""3 86 97))(end_p(""3 86 109)))))((value(Variable((value(Id z))(position((start_p(""3 86 111))(end_p(""3 86 112)))))()))(position((start_p(""3 86 110))(end_p(""3 86 113)))))))(position((start_p(""3 86 97))(end_p(""3 86 113)))))))))(position((start_p(""3 86 86))(end_p(""3 86 113))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/23-field-02.eval.hopix.human-readable b/flap/tests/02-Interpreter/23-field-02.eval.hopix.human-readable
new file mode 100644
index 0000000..e0c557f
--- /dev/null
+++ b/flap/tests/02-Interpreter/23-field-02.eval.hopix.human-readable
@@ -0,0 +1,3 @@
+let t = { a = "0", x = "Field extraction is still a success!\n", y = 31 }
+let z = t.x
+let test = print_string (z)
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/23-field-02.expected b/flap/tests/02-Interpreter/23-field-02.expected
new file mode 100644
index 0000000..8073693
--- /dev/null
+++ b/flap/tests/02-Interpreter/23-field-02.expected
@@ -0,0 +1 @@
+Field extraction is still a success!
diff --git a/flap/tests/02-Interpreter/24-field-03.eval.hopix b/flap/tests/02-Interpreter/24-field-03.eval.hopix
new file mode 100644
index 0000000..9ad6ef3
--- /dev/null
+++ b/flap/tests/02-Interpreter/24-field-03.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id t))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Record((((value(LId a))(position((start_p(""1 0 10))(end_p(""1 0 11)))))((value(Literal((value(LString 0))(position((start_p(""1 0 16))(end_p(""1 0 17)))))))(position((start_p(""1 0 16))(end_p(""1 0 17))))))(((value(LId x))(position((start_p(""1 0 19))(end_p(""1 0 20)))))((value(Literal((value(LString"Field extraction is still a success!\n"))(position((start_p(""1 0 62))(end_p(""1 0 63)))))))(position((start_p(""1 0 62))(end_p(""1 0 63))))))(((value(LId y))(position((start_p(""1 0 65))(end_p(""1 0 66)))))((value(Literal((value(LInt 31))(position((start_p(""1 0 69))(end_p(""1 0 71)))))))(position((start_p(""1 0 69))(end_p(""1 0 71)))))))()))(position((start_p(""1 0 8))(end_p(""1 0 73)))))))))(position((start_p(""1 0 0))(end_p(""1 0 73)))))((value(DefineValue(SimpleValue(((value(Id u))(position((start_p(""2 74 78))(end_p(""2 74 79)))))()((value(Record((((value(LId a))(position((start_p(""2 74 84))(end_p(""2 74 85)))))((value(Record((((value(LId a))(position((start_p(""2 74 90))(end_p(""2 74 91)))))((value(Record((((value(LId a))(position((start_p(""2 74 96))(end_p(""2 74 97)))))((value(Variable((value(Id t))(position((start_p(""2 74 100))(end_p(""2 74 101)))))()))(position((start_p(""2 74 100))(end_p(""2 74 101)))))))(())))(position((start_p(""2 74 94))(end_p(""2 74 105)))))))(())))(position((start_p(""2 74 88))(end_p(""2 74 109))))))(((value(LId b))(position((start_p(""2 74 111))(end_p(""2 74 112)))))((value(Literal((value(LInt 42))(position((start_p(""2 74 115))(end_p(""2 74 117)))))))(position((start_p(""2 74 115))(end_p(""2 74 117)))))))()))(position((start_p(""2 74 82))(end_p(""2 74 119)))))))))(position((start_p(""2 74 74))(end_p(""2 74 119)))))((value(DefineValue(SimpleValue(((value(Id z))(position((start_p(""3 120 124))(end_p(""3 120 125)))))()((value(Field((value(Field((value(Field((value(Field((value(Variable((value(Id u))(position((start_p(""3 120 128))(end_p(""3 120 129)))))()))(position((start_p(""3 120 128))(end_p(""3 120 129)))))((value(LId a))(position((start_p(""3 120 130))(end_p(""3 120 131)))))()))(position((start_p(""3 120 128))(end_p(""3 120 131)))))((value(LId a))(position((start_p(""3 120 132))(end_p(""3 120 133)))))()))(position((start_p(""3 120 128))(end_p(""3 120 133)))))((value(LId a))(position((start_p(""3 120 134))(end_p(""3 120 135)))))()))(position((start_p(""3 120 128))(end_p(""3 120 135)))))((value(LId x))(position((start_p(""3 120 136))(end_p(""3 120 137)))))()))(position((start_p(""3 120 128))(end_p(""3 120 137)))))))))(position((start_p(""3 120 120))(end_p(""3 120 137)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""4 138 142))(end_p(""4 138 146)))))()((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 138 149))(end_p(""4 138 161)))))()))(position((start_p(""4 138 149))(end_p(""4 138 161)))))((value(Variable((value(Id z))(position((start_p(""4 138 163))(end_p(""4 138 164)))))()))(position((start_p(""4 138 162))(end_p(""4 138 165)))))))(position((start_p(""4 138 149))(end_p(""4 138 165)))))))))(position((start_p(""4 138 138))(end_p(""4 138 165))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/24-field-03.eval.hopix.human-readable b/flap/tests/02-Interpreter/24-field-03.eval.hopix.human-readable
new file mode 100644
index 0000000..1952092
--- /dev/null
+++ b/flap/tests/02-Interpreter/24-field-03.eval.hopix.human-readable
@@ -0,0 +1,4 @@
+let t = { a = "0", x = "Field extraction is still a success!\n", y = 31 }
+let u = { a = { a = { a = t }<> }<>, b = 42 }
+let z = u.a.a.a.x
+let test = print_string (z)
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/24-field-03.expected b/flap/tests/02-Interpreter/24-field-03.expected
new file mode 100644
index 0000000..8073693
--- /dev/null
+++ b/flap/tests/02-Interpreter/24-field-03.expected
@@ -0,0 +1 @@
+Field extraction is still a success!
diff --git a/flap/tests/02-Interpreter/25-sequence-01.eval.hopix b/flap/tests/02-Interpreter/25-sequence-01.eval.hopix
new file mode 100644
index 0000000..d53769e
--- /dev/null
+++ b/flap/tests/02-Interpreter/25-sequence-01.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 11 13))(end_p(""2 11 25)))))()))(position((start_p(""2 11 13))(end_p(""2 11 25)))))((value(Literal((value(LString"Two actions..."))(position((start_p(""2 11 42))(end_p(""2 11 43)))))))(position((start_p(""2 11 26))(end_p(""2 11 44)))))))(position((start_p(""2 11 13))(end_p(""2 11 44)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""3 46 48))(end_p(""3 46 60)))))()))(position((start_p(""3 46 48))(end_p(""3 46 60)))))((value(Literal((value(LString"...are separated by a semicolon!\n"))(position((start_p(""3 46 97))(end_p(""3 46 98)))))))(position((start_p(""3 46 61))(end_p(""3 46 99)))))))(position((start_p(""3 46 48))(end_p(""3 46 99))))))))(position((start_p(""2 11 13))(end_p(""3 46 99)))))))))(position((start_p(""1 0 0))(end_p(""3 46 99))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/25-sequence-01.eval.hopix.human-readable b/flap/tests/02-Interpreter/25-sequence-01.eval.hopix.human-readable
new file mode 100644
index 0000000..4c57f87
--- /dev/null
+++ b/flap/tests/02-Interpreter/25-sequence-01.eval.hopix.human-readable
@@ -0,0 +1,3 @@
+let test =
+  print_string ("Two actions...");
+  print_string ("...are separated by a semicolon!\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/25-sequence-01.expected b/flap/tests/02-Interpreter/25-sequence-01.expected
new file mode 100644
index 0000000..371da8d
--- /dev/null
+++ b/flap/tests/02-Interpreter/25-sequence-01.expected
@@ -0,0 +1 @@
+Two actions......are separated by a semicolon!
diff --git a/flap/tests/02-Interpreter/26-sequence-02.eval.hopix b/flap/tests/02-Interpreter/26-sequence-02.eval.hopix
new file mode 100644
index 0000000..0cfcd24
--- /dev/null
+++ b/flap/tests/02-Interpreter/26-sequence-02.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 11 15))(end_p(""2 11 27)))))()))(position((start_p(""2 11 15))(end_p(""2 11 27)))))((value(Literal((value(LString"This actually should"))(position((start_p(""2 11 50))(end_p(""2 11 51)))))))(position((start_p(""2 11 28))(end_p(""2 11 52)))))))(position((start_p(""2 11 15))(end_p(""2 11 52)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""3 54 58))(end_p(""3 54 70)))))()))(position((start_p(""3 54 58))(end_p(""3 54 70)))))((value(Literal((value(LString" work with"))(position((start_p(""3 54 83))(end_p(""3 54 84)))))))(position((start_p(""3 54 71))(end_p(""3 54 85)))))))(position((start_p(""3 54 58))(end_p(""3 54 85)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 87 91))(end_p(""4 87 103)))))()))(position((start_p(""4 87 91))(end_p(""4 87 103)))))((value(Literal((value(LString" any number of"))(position((start_p(""4 87 120))(end_p(""4 87 121)))))))(position((start_p(""4 87 104))(end_p(""4 87 122)))))))(position((start_p(""4 87 91))(end_p(""4 87 122)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""5 124 128))(end_p(""5 124 140)))))()))(position((start_p(""5 124 128))(end_p(""5 124 140)))))((value(Literal((value(LString" actions!\n"))(position((start_p(""5 124 154))(end_p(""5 124 155)))))))(position((start_p(""5 124 141))(end_p(""5 124 156)))))))(position((start_p(""5 124 128))(end_p(""5 124 156))))))))(position((start_p(""4 87 91))(end_p(""5 124 156))))))))(position((start_p(""3 54 58))(end_p(""5 124 156))))))))(position((start_p(""2 11 15))(end_p(""5 124 156)))))))))(position((start_p(""1 0 0))(end_p(""5 124 156))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/26-sequence-02.eval.hopix.human-readable b/flap/tests/02-Interpreter/26-sequence-02.eval.hopix.human-readable
new file mode 100644
index 0000000..c421980
--- /dev/null
+++ b/flap/tests/02-Interpreter/26-sequence-02.eval.hopix.human-readable
@@ -0,0 +1,5 @@
+let test =
+    print_string ("This actually should");
+    print_string (" work with");
+    print_string (" any number of");
+    print_string (" actions!\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/26-sequence-02.expected b/flap/tests/02-Interpreter/26-sequence-02.expected
new file mode 100644
index 0000000..7689cdb
--- /dev/null
+++ b/flap/tests/02-Interpreter/26-sequence-02.expected
@@ -0,0 +1 @@
+This actually should work with any number of actions!
diff --git a/flap/tests/02-Interpreter/27-local-definition-01.eval.hopix b/flap/tests/02-Interpreter/27-local-definition-01.eval.hopix
new file mode 100644
index 0000000..c81de41
--- /dev/null
+++ b/flap/tests/02-Interpreter/27-local-definition-01.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Define(SimpleValue(((value(Id x))(position((start_p(""2 11 17))(end_p(""2 11 18)))))()((value(Literal((value(LString"This test is OK.\n"))(position((start_p(""2 11 40))(end_p(""2 11 41)))))))(position((start_p(""2 11 40))(end_p(""2 11 41)))))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""3 43 45))(end_p(""3 43 57)))))()))(position((start_p(""3 43 45))(end_p(""3 43 57)))))((value(Variable((value(Id x))(position((start_p(""3 43 59))(end_p(""3 43 60)))))()))(position((start_p(""3 43 58))(end_p(""3 43 61)))))))(position((start_p(""3 43 45))(end_p(""3 43 61)))))))(position((start_p(""2 11 13))(end_p(""3 43 61)))))))))(position((start_p(""1 0 0))(end_p(""3 43 61))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/27-local-definition-01.eval.hopix.human-readable b/flap/tests/02-Interpreter/27-local-definition-01.eval.hopix.human-readable
new file mode 100644
index 0000000..ddfe04f
--- /dev/null
+++ b/flap/tests/02-Interpreter/27-local-definition-01.eval.hopix.human-readable
@@ -0,0 +1,3 @@
+let test =
+  let x = "This test is OK.\n";
+  print_string (x)
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/27-local-definition-01.expected b/flap/tests/02-Interpreter/27-local-definition-01.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/27-local-definition-01.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/28-local-definition-02.eval.hopix b/flap/tests/02-Interpreter/28-local-definition-02.eval.hopix
new file mode 100644
index 0000000..43e7969
--- /dev/null
+++ b/flap/tests/02-Interpreter/28-local-definition-02.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Define(SimpleValue(((value(Id x))(position((start_p(""2 11 17))(end_p(""2 11 18)))))()((value(Literal((value(LString"This test is KO.\n"))(position((start_p(""2 11 40))(end_p(""2 11 41)))))))(position((start_p(""2 11 40))(end_p(""2 11 41)))))))((value(Define(SimpleValue(((value(Id x))(position((start_p(""3 43 49))(end_p(""3 43 50)))))()((value(Literal((value(LString"This test is OK.\n"))(position((start_p(""3 43 72))(end_p(""3 43 73)))))))(position((start_p(""3 43 72))(end_p(""3 43 73)))))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 75 77))(end_p(""4 75 89)))))()))(position((start_p(""4 75 77))(end_p(""4 75 89)))))((value(Variable((value(Id x))(position((start_p(""4 75 91))(end_p(""4 75 92)))))()))(position((start_p(""4 75 90))(end_p(""4 75 93)))))))(position((start_p(""4 75 77))(end_p(""4 75 93)))))))(position((start_p(""3 43 45))(end_p(""4 75 93)))))))(position((start_p(""2 11 13))(end_p(""4 75 93)))))))))(position((start_p(""1 0 0))(end_p(""4 75 93))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/28-local-definition-02.eval.hopix.human-readable b/flap/tests/02-Interpreter/28-local-definition-02.eval.hopix.human-readable
new file mode 100644
index 0000000..924cbe3
--- /dev/null
+++ b/flap/tests/02-Interpreter/28-local-definition-02.eval.hopix.human-readable
@@ -0,0 +1,4 @@
+let test =
+  let x = "This test is KO.\n";
+  let x = "This test is OK.\n";
+  print_string (x)
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/28-local-definition-02.expected b/flap/tests/02-Interpreter/28-local-definition-02.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/28-local-definition-02.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/29-local-definition-03.eval.hopix b/flap/tests/02-Interpreter/29-local-definition-03.eval.hopix
new file mode 100644
index 0000000..a364527
--- /dev/null
+++ b/flap/tests/02-Interpreter/29-local-definition-03.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Define(SimpleValue(((value(Id x))(position((start_p(""2 11 17))(end_p(""2 11 18)))))()((value(Literal((value(LString"This test is KO.\n"))(position((start_p(""2 11 40))(end_p(""2 11 41)))))))(position((start_p(""2 11 40))(end_p(""2 11 41)))))))((value(Define(SimpleValue(((value(Id x))(position((start_p(""3 43 49))(end_p(""3 43 50)))))()((value(Literal((value(LString"This test is KO.\n"))(position((start_p(""3 43 72))(end_p(""3 43 73)))))))(position((start_p(""3 43 72))(end_p(""3 43 73)))))))((value(Define(SimpleValue(((value(Id x))(position((start_p(""4 75 81))(end_p(""4 75 82)))))()((value(Literal((value(LString"This test is OK.\n"))(position((start_p(""4 75 104))(end_p(""4 75 105)))))))(position((start_p(""4 75 104))(end_p(""4 75 105)))))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""5 107 109))(end_p(""5 107 121)))))()))(position((start_p(""5 107 109))(end_p(""5 107 121)))))((value(Variable((value(Id x))(position((start_p(""5 107 123))(end_p(""5 107 124)))))()))(position((start_p(""5 107 122))(end_p(""5 107 125)))))))(position((start_p(""5 107 109))(end_p(""5 107 125)))))))(position((start_p(""4 75 77))(end_p(""5 107 125)))))))(position((start_p(""3 43 45))(end_p(""5 107 125)))))))(position((start_p(""2 11 13))(end_p(""5 107 125)))))))))(position((start_p(""1 0 0))(end_p(""5 107 125))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/29-local-definition-03.eval.hopix.human-readable b/flap/tests/02-Interpreter/29-local-definition-03.eval.hopix.human-readable
new file mode 100644
index 0000000..50c95c4
--- /dev/null
+++ b/flap/tests/02-Interpreter/29-local-definition-03.eval.hopix.human-readable
@@ -0,0 +1,5 @@
+let test =
+  let x = "This test is KO.\n";
+  let x = "This test is KO.\n";
+  let x = "This test is OK.\n";
+  print_string (x)
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/29-local-definition-03.expected b/flap/tests/02-Interpreter/29-local-definition-03.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/29-local-definition-03.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/30-local-definition-04.eval.hopix b/flap/tests/02-Interpreter/30-local-definition-04.eval.hopix
new file mode 100644
index 0000000..55e4772
--- /dev/null
+++ b/flap/tests/02-Interpreter/30-local-definition-04.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Define(SimpleValue(((value(Id x))(position((start_p(""2 11 17))(end_p(""2 11 18)))))()((value(Literal((value(LString"This test is KO.\n"))(position((start_p(""2 11 40))(end_p(""2 11 41)))))))(position((start_p(""2 11 40))(end_p(""2 11 41)))))))((value(Define(SimpleValue(((value(Id x))(position((start_p(""3 43 49))(end_p(""3 43 50)))))()((value(Define(SimpleValue(((value(Id x))(position((start_p(""4 55 63))(end_p(""4 55 64)))))()((value(Literal((value(LString"This test is"))(position((start_p(""4 55 80))(end_p(""4 55 81)))))))(position((start_p(""4 55 80))(end_p(""4 55 81)))))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""5 83 87))(end_p(""5 83 99)))))()))(position((start_p(""5 83 87))(end_p(""5 83 99)))))((value(Variable((value(Id x))(position((start_p(""5 83 101))(end_p(""5 83 102)))))()))(position((start_p(""5 83 100))(end_p(""5 83 103)))))))(position((start_p(""5 83 87))(end_p(""5 83 103)))))))(position((start_p(""3 43 53))(end_p(""6 104 107)))))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""7 109 111))(end_p(""7 109 123)))))()))(position((start_p(""7 109 111))(end_p(""7 109 123)))))((value(Literal((value(LString" OK!\n"))(position((start_p(""7 109 132))(end_p(""7 109 133)))))))(position((start_p(""7 109 124))(end_p(""7 109 134)))))))(position((start_p(""7 109 111))(end_p(""7 109 134)))))))(position((start_p(""3 43 45))(end_p(""7 109 134)))))))(position((start_p(""2 11 13))(end_p(""7 109 134)))))))))(position((start_p(""1 0 0))(end_p(""7 109 134))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/30-local-definition-04.eval.hopix.human-readable b/flap/tests/02-Interpreter/30-local-definition-04.eval.hopix.human-readable
new file mode 100644
index 0000000..2ac9f0f
--- /dev/null
+++ b/flap/tests/02-Interpreter/30-local-definition-04.eval.hopix.human-readable
@@ -0,0 +1,7 @@
+let test =
+  let x = "This test is KO.\n";
+  let x = (
+    let x = "This test is";
+    print_string (x)
+  );
+  print_string (" OK!\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/30-local-definition-04.expected b/flap/tests/02-Interpreter/30-local-definition-04.expected
new file mode 100644
index 0000000..e930c03
--- /dev/null
+++ b/flap/tests/02-Interpreter/30-local-definition-04.expected
@@ -0,0 +1 @@
+This test is OK!
diff --git a/flap/tests/02-Interpreter/31-local-definition-05.eval.hopix b/flap/tests/02-Interpreter/31-local-definition-05.eval.hopix
new file mode 100644
index 0000000..55e4772
--- /dev/null
+++ b/flap/tests/02-Interpreter/31-local-definition-05.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Define(SimpleValue(((value(Id x))(position((start_p(""2 11 17))(end_p(""2 11 18)))))()((value(Literal((value(LString"This test is KO.\n"))(position((start_p(""2 11 40))(end_p(""2 11 41)))))))(position((start_p(""2 11 40))(end_p(""2 11 41)))))))((value(Define(SimpleValue(((value(Id x))(position((start_p(""3 43 49))(end_p(""3 43 50)))))()((value(Define(SimpleValue(((value(Id x))(position((start_p(""4 55 63))(end_p(""4 55 64)))))()((value(Literal((value(LString"This test is"))(position((start_p(""4 55 80))(end_p(""4 55 81)))))))(position((start_p(""4 55 80))(end_p(""4 55 81)))))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""5 83 87))(end_p(""5 83 99)))))()))(position((start_p(""5 83 87))(end_p(""5 83 99)))))((value(Variable((value(Id x))(position((start_p(""5 83 101))(end_p(""5 83 102)))))()))(position((start_p(""5 83 100))(end_p(""5 83 103)))))))(position((start_p(""5 83 87))(end_p(""5 83 103)))))))(position((start_p(""3 43 53))(end_p(""6 104 107)))))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""7 109 111))(end_p(""7 109 123)))))()))(position((start_p(""7 109 111))(end_p(""7 109 123)))))((value(Literal((value(LString" OK!\n"))(position((start_p(""7 109 132))(end_p(""7 109 133)))))))(position((start_p(""7 109 124))(end_p(""7 109 134)))))))(position((start_p(""7 109 111))(end_p(""7 109 134)))))))(position((start_p(""3 43 45))(end_p(""7 109 134)))))))(position((start_p(""2 11 13))(end_p(""7 109 134)))))))))(position((start_p(""1 0 0))(end_p(""7 109 134))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/31-local-definition-05.eval.hopix.human-readable b/flap/tests/02-Interpreter/31-local-definition-05.eval.hopix.human-readable
new file mode 100644
index 0000000..2ac9f0f
--- /dev/null
+++ b/flap/tests/02-Interpreter/31-local-definition-05.eval.hopix.human-readable
@@ -0,0 +1,7 @@
+let test =
+  let x = "This test is KO.\n";
+  let x = (
+    let x = "This test is";
+    print_string (x)
+  );
+  print_string (" OK!\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/31-local-definition-05.expected b/flap/tests/02-Interpreter/31-local-definition-05.expected
new file mode 100644
index 0000000..e930c03
--- /dev/null
+++ b/flap/tests/02-Interpreter/31-local-definition-05.expected
@@ -0,0 +1 @@
+This test is OK!
diff --git a/flap/tests/02-Interpreter/32-application.eval.hopix b/flap/tests/02-Interpreter/32-application.eval.hopix
new file mode 100644
index 0000000..d2f6839
--- /dev/null
+++ b/flap/tests/02-Interpreter/32-application.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id id))(position((start_p(""1 0 4))(end_p(""1 0 6)))))()((value(Fun(FunctionDefinition((value(PVariable((value(Id x))(position((start_p(""1 0 10))(end_p(""1 0 11)))))))(position((start_p(""1 0 10))(end_p(""1 0 11)))))((value(Variable((value(Id x))(position((start_p(""1 0 15))(end_p(""1 0 16)))))()))(position((start_p(""1 0 15))(end_p(""1 0 16))))))))(position((start_p(""1 0 9))(end_p(""1 0 16)))))))))(position((start_p(""1 0 0))(end_p(""1 0 16)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 17 21))(end_p(""2 17 25)))))()((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 17 28))(end_p(""2 17 40)))))()))(position((start_p(""2 17 28))(end_p(""2 17 40)))))((value(Apply((value(Variable((value(Id id))(position((start_p(""2 17 42))(end_p(""2 17 44)))))()))(position((start_p(""2 17 42))(end_p(""2 17 44)))))((value(Literal((value(LString"This test is OK.\n"))(position((start_p(""2 17 65))(end_p(""2 17 66)))))))(position((start_p(""2 17 45))(end_p(""2 17 67)))))))(position((start_p(""2 17 41))(end_p(""2 17 68)))))))(position((start_p(""2 17 28))(end_p(""2 17 68)))))))))(position((start_p(""2 17 17))(end_p(""2 17 68))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/32-application.eval.hopix.human-readable b/flap/tests/02-Interpreter/32-application.eval.hopix.human-readable
new file mode 100644
index 0000000..c8c0141
--- /dev/null
+++ b/flap/tests/02-Interpreter/32-application.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let id = \x -> x
+let test = print_string (id ("This test is OK.\n"))
diff --git a/flap/tests/02-Interpreter/32-application.expected b/flap/tests/02-Interpreter/32-application.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/32-application.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/33-application-02.eval.hopix b/flap/tests/02-Interpreter/33-application-02.eval.hopix
new file mode 100644
index 0000000..22bf528
--- /dev/null
+++ b/flap/tests/02-Interpreter/33-application-02.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id first))(position((start_p(""1 0 4))(end_p(""1 0 9)))))()((value(Fun(FunctionDefinition((value(PTuple(((value(PVariable((value(Id x))(position((start_p(""1 0 14))(end_p(""1 0 15)))))))(position((start_p(""1 0 14))(end_p(""1 0 15)))))((value(PVariable((value(Id y))(position((start_p(""1 0 17))(end_p(""1 0 18)))))))(position((start_p(""1 0 17))(end_p(""1 0 18))))))))(position((start_p(""1 0 13))(end_p(""1 0 19)))))((value(Variable((value(Id x))(position((start_p(""1 0 23))(end_p(""1 0 24)))))()))(position((start_p(""1 0 23))(end_p(""1 0 24))))))))(position((start_p(""1 0 12))(end_p(""1 0 24)))))))))(position((start_p(""1 0 0))(end_p(""1 0 24)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 25 29))(end_p(""2 25 33)))))()((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""3 36 38))(end_p(""3 36 50)))))()))(position((start_p(""3 36 38))(end_p(""3 36 50)))))((value(Literal((value(LString"This test is "))(position((start_p(""3 36 66))(end_p(""3 36 67)))))))(position((start_p(""3 36 51))(end_p(""3 36 68)))))))(position((start_p(""3 36 38))(end_p(""3 36 68)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 70 72))(end_p(""4 70 84)))))()))(position((start_p(""4 70 72))(end_p(""4 70 84)))))((value(Apply((value(Variable((value(Id first))(position((start_p(""4 70 86))(end_p(""4 70 91)))))()))(position((start_p(""4 70 86))(end_p(""4 70 91)))))((value(Tuple(((value(Literal((value(LString OK))(position((start_p(""4 70 96))(end_p(""4 70 97)))))))(position((start_p(""4 70 96))(end_p(""4 70 97)))))((value(Literal((value(LString KO))(position((start_p(""4 70 102))(end_p(""4 70 103)))))))(position((start_p(""4 70 102))(end_p(""4 70 103))))))))(position((start_p(""4 70 92))(end_p(""4 70 104)))))))(position((start_p(""4 70 85))(end_p(""4 70 105)))))))(position((start_p(""4 70 72))(end_p(""4 70 105)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""5 107 109))(end_p(""5 107 121)))))()))(position((start_p(""5 107 109))(end_p(""5 107 121)))))((value(Literal((value(LString".\n"))(position((start_p(""5 107 127))(end_p(""5 107 128)))))))(position((start_p(""5 107 122))(end_p(""5 107 129)))))))(position((start_p(""5 107 109))(end_p(""5 107 129))))))))(position((start_p(""4 70 72))(end_p(""5 107 129))))))))(position((start_p(""3 36 38))(end_p(""5 107 129)))))))))(position((start_p(""2 25 25))(end_p(""5 107 129))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/33-application-02.eval.hopix.human-readable b/flap/tests/02-Interpreter/33-application-02.eval.hopix.human-readable
new file mode 100644
index 0000000..9380d54
--- /dev/null
+++ b/flap/tests/02-Interpreter/33-application-02.eval.hopix.human-readable
@@ -0,0 +1,5 @@
+let first = \(x, y) -> x
+let test =
+  print_string ("This test is ");
+  print_string (first ("OK", "KO"));
+  print_string (".\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/33-application-02.expected b/flap/tests/02-Interpreter/33-application-02.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/33-application-02.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/34-application-03.eval.hopix b/flap/tests/02-Interpreter/34-application-03.eval.hopix
new file mode 100644
index 0000000..bbc27ac
--- /dev/null
+++ b/flap/tests/02-Interpreter/34-application-03.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id apply))(position((start_p(""1 0 4))(end_p(""1 0 9)))))()((value(Fun(FunctionDefinition((value(PTuple(((value(PVariable((value(Id f))(position((start_p(""1 0 14))(end_p(""1 0 15)))))))(position((start_p(""1 0 14))(end_p(""1 0 15)))))((value(PVariable((value(Id x))(position((start_p(""1 0 17))(end_p(""1 0 18)))))))(position((start_p(""1 0 17))(end_p(""1 0 18))))))))(position((start_p(""1 0 13))(end_p(""1 0 19)))))((value(Apply((value(Variable((value(Id f))(position((start_p(""1 0 23))(end_p(""1 0 24)))))()))(position((start_p(""1 0 23))(end_p(""1 0 24)))))((value(Variable((value(Id x))(position((start_p(""1 0 26))(end_p(""1 0 27)))))()))(position((start_p(""1 0 25))(end_p(""1 0 28)))))))(position((start_p(""1 0 23))(end_p(""1 0 28))))))))(position((start_p(""1 0 12))(end_p(""1 0 28)))))))))(position((start_p(""1 0 0))(end_p(""1 0 28)))))((value(DefineValue(SimpleValue(((value(Id id))(position((start_p(""2 29 33))(end_p(""2 29 35)))))()((value(Fun(FunctionDefinition((value(PVariable((value(Id x))(position((start_p(""2 29 39))(end_p(""2 29 40)))))))(position((start_p(""2 29 39))(end_p(""2 29 40)))))((value(Variable((value(Id x))(position((start_p(""2 29 44))(end_p(""2 29 45)))))()))(position((start_p(""2 29 44))(end_p(""2 29 45))))))))(position((start_p(""2 29 38))(end_p(""2 29 45)))))))))(position((start_p(""2 29 29))(end_p(""2 29 45)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""3 46 50))(end_p(""3 46 54)))))()((value(Apply((value(Variable((value(Id print_string))(position((start_p(""3 46 57))(end_p(""3 46 69)))))()))(position((start_p(""3 46 57))(end_p(""3 46 69)))))((value(Apply((value(Variable((value(Id apply))(position((start_p(""3 46 71))(end_p(""3 46 76)))))()))(position((start_p(""3 46 71))(end_p(""3 46 76)))))((value(Tuple(((value(Variable((value(Id id))(position((start_p(""3 46 78))(end_p(""3 46 80)))))()))(position((start_p(""3 46 78))(end_p(""3 46 80)))))((value(Literal((value(LString"This test is OK.\n"))(position((start_p(""3 46 101))(end_p(""3 46 102)))))))(position((start_p(""3 46 101))(end_p(""3 46 102))))))))(position((start_p(""3 46 77))(end_p(""3 46 103)))))))(position((start_p(""3 46 70))(end_p(""3 46 104)))))))(position((start_p(""3 46 57))(end_p(""3 46 104)))))))))(position((start_p(""3 46 46))(end_p(""3 46 104))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/34-application-03.eval.hopix.human-readable b/flap/tests/02-Interpreter/34-application-03.eval.hopix.human-readable
new file mode 100644
index 0000000..871ab63
--- /dev/null
+++ b/flap/tests/02-Interpreter/34-application-03.eval.hopix.human-readable
@@ -0,0 +1,3 @@
+let apply = \(f, x) -> f (x)
+let id = \x -> x
+let test = print_string (apply (id, "This test is OK.\n"))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/34-application-03.expected b/flap/tests/02-Interpreter/34-application-03.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/34-application-03.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/35-application-04.eval.hopix b/flap/tests/02-Interpreter/35-application-04.eval.hopix
new file mode 100644
index 0000000..01b6b1c
--- /dev/null
+++ b/flap/tests/02-Interpreter/35-application-04.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Define(SimpleValue(((value(Id msg))(position((start_p(""2 11 19))(end_p(""2 11 22)))))()((value(Literal((value(LString"This test is OK.\n"))(position((start_p(""2 11 44))(end_p(""2 11 45)))))))(position((start_p(""2 11 44))(end_p(""2 11 45)))))))((value(Define(SimpleValue(((value(Id cst))(position((start_p(""3 47 55))(end_p(""3 47 58)))))()((value(Fun(FunctionDefinition((value(PVariable((value(Id x))(position((start_p(""3 47 63))(end_p(""3 47 64)))))))(position((start_p(""3 47 63))(end_p(""3 47 64)))))((value(Variable((value(Id msg))(position((start_p(""3 47 68))(end_p(""3 47 71)))))()))(position((start_p(""3 47 68))(end_p(""3 47 71))))))))(position((start_p(""3 47 61))(end_p(""3 47 72)))))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 74 78))(end_p(""4 74 90)))))()))(position((start_p(""4 74 78))(end_p(""4 74 90)))))((value(Apply((value(Variable((value(Id cst))(position((start_p(""4 74 92))(end_p(""4 74 95)))))()))(position((start_p(""4 74 92))(end_p(""4 74 95)))))((value(Literal((value(LString"This test is KO.\n"))(position((start_p(""4 74 116))(end_p(""4 74 117)))))))(position((start_p(""4 74 96))(end_p(""4 74 118)))))))(position((start_p(""4 74 91))(end_p(""4 74 119)))))))(position((start_p(""4 74 78))(end_p(""4 74 119)))))))(position((start_p(""3 47 51))(end_p(""4 74 119)))))))(position((start_p(""2 11 15))(end_p(""4 74 119)))))))))(position((start_p(""1 0 0))(end_p(""4 74 119))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/35-application-04.eval.hopix.human-readable b/flap/tests/02-Interpreter/35-application-04.eval.hopix.human-readable
new file mode 100644
index 0000000..26e6dad
--- /dev/null
+++ b/flap/tests/02-Interpreter/35-application-04.eval.hopix.human-readable
@@ -0,0 +1,4 @@
+let test =
+    let msg = "This test is OK.\n";
+    let cst = (\x -> msg);
+    print_string (cst ("This test is KO.\n"))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/35-application-04.expected b/flap/tests/02-Interpreter/35-application-04.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/35-application-04.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/36-allocate-01.eval.hopix b/flap/tests/02-Interpreter/36-allocate-01.eval.hopix
new file mode 100644
index 0000000..4e1fa6c
--- /dev/null
+++ b/flap/tests/02-Interpreter/36-allocate-01.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id r))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Ref((value(Literal((value(LInt 0))(position((start_p(""1 0 12))(end_p(""1 0 13)))))))(position((start_p(""1 0 12))(end_p(""1 0 13)))))))(position((start_p(""1 0 8))(end_p(""1 0 13)))))))))(position((start_p(""1 0 0))(end_p(""1 0 13)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 14 18))(end_p(""2 14 22)))))()((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 14 25))(end_p(""2 14 37)))))()))(position((start_p(""2 14 25))(end_p(""2 14 37)))))((value(Literal((value(LString"Allocate went well.\n"))(position((start_p(""2 14 61))(end_p(""2 14 62)))))))(position((start_p(""2 14 38))(end_p(""2 14 63)))))))(position((start_p(""2 14 25))(end_p(""2 14 63)))))))))(position((start_p(""2 14 14))(end_p(""2 14 63))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/36-allocate-01.eval.hopix.human-readable b/flap/tests/02-Interpreter/36-allocate-01.eval.hopix.human-readable
new file mode 100644
index 0000000..48329e2
--- /dev/null
+++ b/flap/tests/02-Interpreter/36-allocate-01.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let r = ref 0
+let test = print_string ("Allocate went well.\n")
diff --git a/flap/tests/02-Interpreter/36-allocate-01.expected b/flap/tests/02-Interpreter/36-allocate-01.expected
new file mode 100644
index 0000000..6a5e374
--- /dev/null
+++ b/flap/tests/02-Interpreter/36-allocate-01.expected
@@ -0,0 +1 @@
+Allocate went well.
diff --git a/flap/tests/02-Interpreter/37-allocate-02.eval.hopix b/flap/tests/02-Interpreter/37-allocate-02.eval.hopix
new file mode 100644
index 0000000..a7e1e02
--- /dev/null
+++ b/flap/tests/02-Interpreter/37-allocate-02.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id r))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Ref((value(Literal((value(LString"This test is OK.\n"))(position((start_p(""1 0 31))(end_p(""1 0 32)))))))(position((start_p(""1 0 31))(end_p(""1 0 32)))))))(position((start_p(""1 0 8))(end_p(""1 0 32)))))))))(position((start_p(""1 0 0))(end_p(""1 0 32)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 33 37))(end_p(""2 33 41)))))()((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 33 44))(end_p(""2 33 56)))))()))(position((start_p(""2 33 44))(end_p(""2 33 56)))))((value(Read((value(Variable((value(Id r))(position((start_p(""2 33 59))(end_p(""2 33 60)))))()))(position((start_p(""2 33 59))(end_p(""2 33 60)))))))(position((start_p(""2 33 57))(end_p(""2 33 61)))))))(position((start_p(""2 33 44))(end_p(""2 33 61)))))))))(position((start_p(""2 33 33))(end_p(""2 33 61))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/37-allocate-02.eval.hopix.human-readable b/flap/tests/02-Interpreter/37-allocate-02.eval.hopix.human-readable
new file mode 100644
index 0000000..6a537bd
--- /dev/null
+++ b/flap/tests/02-Interpreter/37-allocate-02.eval.hopix.human-readable
@@ -0,0 +1,2 @@
+let r = ref "This test is OK.\n"
+let test = print_string (!r)
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/37-allocate-02.expected b/flap/tests/02-Interpreter/37-allocate-02.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/37-allocate-02.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/38-allocate-03.eval.hopix b/flap/tests/02-Interpreter/38-allocate-03.eval.hopix
new file mode 100644
index 0000000..9f6eaf2
--- /dev/null
+++ b/flap/tests/02-Interpreter/38-allocate-03.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id r))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Ref((value(Literal((value(LString"This test is KO.\n"))(position((start_p(""1 0 31))(end_p(""1 0 32)))))))(position((start_p(""1 0 31))(end_p(""1 0 32)))))))(position((start_p(""1 0 8))(end_p(""1 0 32)))))))))(position((start_p(""1 0 0))(end_p(""1 0 32)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 33 37))(end_p(""2 33 41)))))()((value(Sequence(((value(Assign((value(Variable((value(Id r))(position((start_p(""3 44 48))(end_p(""3 44 49)))))()))(position((start_p(""3 44 48))(end_p(""3 44 49)))))((value(Literal((value(LString"This test is OK.\n"))(position((start_p(""3 44 72))(end_p(""3 44 73)))))))(position((start_p(""3 44 72))(end_p(""3 44 73)))))))(position((start_p(""3 44 48))(end_p(""3 44 73)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 75 79))(end_p(""4 75 91)))))()))(position((start_p(""4 75 79))(end_p(""4 75 91)))))((value(Read((value(Variable((value(Id r))(position((start_p(""4 75 94))(end_p(""4 75 95)))))()))(position((start_p(""4 75 94))(end_p(""4 75 95)))))))(position((start_p(""4 75 92))(end_p(""4 75 96)))))))(position((start_p(""4 75 79))(end_p(""4 75 96))))))))(position((start_p(""3 44 48))(end_p(""4 75 96)))))))))(position((start_p(""2 33 33))(end_p(""4 75 96))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/38-allocate-03.eval.hopix.human-readable b/flap/tests/02-Interpreter/38-allocate-03.eval.hopix.human-readable
new file mode 100644
index 0000000..daa96a3
--- /dev/null
+++ b/flap/tests/02-Interpreter/38-allocate-03.eval.hopix.human-readable
@@ -0,0 +1,4 @@
+let r = ref "This test is KO.\n"
+let test =
+    r := "This test is OK.\n";
+    print_string (!r)
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/38-allocate-03.expected b/flap/tests/02-Interpreter/38-allocate-03.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/38-allocate-03.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/39-allocate-04.eval.hopix b/flap/tests/02-Interpreter/39-allocate-04.eval.hopix
new file mode 100644
index 0000000..66d86e2
--- /dev/null
+++ b/flap/tests/02-Interpreter/39-allocate-04.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id r))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Ref((value(Literal((value(LString KO))(position((start_p(""1 0 15))(end_p(""1 0 16)))))))(position((start_p(""1 0 15))(end_p(""1 0 16)))))))(position((start_p(""1 0 8))(end_p(""1 0 16)))))))))(position((start_p(""1 0 0))(end_p(""1 0 16)))))((value(DefineValue(SimpleValue(((value(Id alias))(position((start_p(""2 17 21))(end_p(""2 17 26)))))()((value(Variable((value(Id r))(position((start_p(""2 17 29))(end_p(""2 17 30)))))()))(position((start_p(""2 17 29))(end_p(""2 17 30)))))))))(position((start_p(""2 17 17))(end_p(""2 17 30)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""3 31 35))(end_p(""3 31 39)))))()((value(Sequence(((value(Assign((value(Variable((value(Id alias))(position((start_p(""4 42 46))(end_p(""4 42 51)))))()))(position((start_p(""4 42 46))(end_p(""4 42 51)))))((value(Literal((value(LString OK))(position((start_p(""4 42 58))(end_p(""4 42 59)))))))(position((start_p(""4 42 58))(end_p(""4 42 59)))))))(position((start_p(""4 42 46))(end_p(""4 42 59)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""5 61 65))(end_p(""5 61 77)))))()))(position((start_p(""5 61 65))(end_p(""5 61 77)))))((value(Literal((value(LString"This test is "))(position((start_p(""5 61 93))(end_p(""5 61 94)))))))(position((start_p(""5 61 78))(end_p(""5 61 95)))))))(position((start_p(""5 61 65))(end_p(""5 61 95)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""6 97 101))(end_p(""6 97 113)))))()))(position((start_p(""6 97 101))(end_p(""6 97 113)))))((value(Read((value(Variable((value(Id r))(position((start_p(""6 97 116))(end_p(""6 97 117)))))()))(position((start_p(""6 97 116))(end_p(""6 97 117)))))))(position((start_p(""6 97 114))(end_p(""6 97 118)))))))(position((start_p(""6 97 101))(end_p(""6 97 118)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""7 120 124))(end_p(""7 120 136)))))()))(position((start_p(""7 120 124))(end_p(""7 120 136)))))((value(Literal((value(LString".\n"))(position((start_p(""7 120 142))(end_p(""7 120 143)))))))(position((start_p(""7 120 137))(end_p(""7 120 144)))))))(position((start_p(""7 120 124))(end_p(""7 120 144))))))))(position((start_p(""6 97 101))(end_p(""7 120 144))))))))(position((start_p(""5 61 65))(end_p(""7 120 144))))))))(position((start_p(""4 42 46))(end_p(""7 120 144)))))))))(position((start_p(""3 31 31))(end_p(""7 120 144))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/39-allocate-04.eval.hopix.human-readable b/flap/tests/02-Interpreter/39-allocate-04.eval.hopix.human-readable
new file mode 100644
index 0000000..6453fef
--- /dev/null
+++ b/flap/tests/02-Interpreter/39-allocate-04.eval.hopix.human-readable
@@ -0,0 +1,7 @@
+let r = ref "KO"
+let alias = r
+let test =
+    alias := "OK";
+    print_string ("This test is ");
+    print_string (!r);
+    print_string (".\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/39-allocate-04.expected b/flap/tests/02-Interpreter/39-allocate-04.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/39-allocate-04.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/40-allocate-05.eval.hopix b/flap/tests/02-Interpreter/40-allocate-05.eval.hopix
new file mode 100644
index 0000000..69ba99a
--- /dev/null
+++ b/flap/tests/02-Interpreter/40-allocate-05.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id r1))(position((start_p(""1 0 4))(end_p(""1 0 6)))))()((value(Ref((value(Ref((value(Literal((value(LString KO))(position((start_p(""1 0 21))(end_p(""1 0 22)))))))(position((start_p(""1 0 21))(end_p(""1 0 22)))))))(position((start_p(""1 0 13))(end_p(""1 0 23)))))))(position((start_p(""1 0 9))(end_p(""1 0 23)))))))))(position((start_p(""1 0 0))(end_p(""1 0 23)))))((value(DefineValue(SimpleValue(((value(Id r2))(position((start_p(""2 24 28))(end_p(""2 24 30)))))()((value(Ref((value(Literal((value(LString KO))(position((start_p(""2 24 40))(end_p(""2 24 41)))))))(position((start_p(""2 24 40))(end_p(""2 24 41)))))))(position((start_p(""2 24 33))(end_p(""2 24 41)))))))))(position((start_p(""2 24 24))(end_p(""2 24 41)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""3 42 46))(end_p(""3 42 50)))))()((value(Sequence(((value(Assign((value(Variable((value(Id r1))(position((start_p(""4 53 57))(end_p(""4 53 59)))))()))(position((start_p(""4 53 57))(end_p(""4 53 59)))))((value(Variable((value(Id r2))(position((start_p(""4 53 63))(end_p(""4 53 65)))))()))(position((start_p(""4 53 63))(end_p(""4 53 65)))))))(position((start_p(""4 53 57))(end_p(""4 53 65)))))((value(Sequence(((value(Assign((value(Variable((value(Id r2))(position((start_p(""5 67 71))(end_p(""5 67 73)))))()))(position((start_p(""5 67 71))(end_p(""5 67 73)))))((value(Literal((value(LString OK))(position((start_p(""5 67 80))(end_p(""5 67 81)))))))(position((start_p(""5 67 80))(end_p(""5 67 81)))))))(position((start_p(""5 67 71))(end_p(""5 67 81)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""6 83 87))(end_p(""6 83 99)))))()))(position((start_p(""6 83 87))(end_p(""6 83 99)))))((value(Literal((value(LString"This test is "))(position((start_p(""6 83 115))(end_p(""6 83 116)))))))(position((start_p(""6 83 100))(end_p(""6 83 117)))))))(position((start_p(""6 83 87))(end_p(""6 83 117)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""7 119 123))(end_p(""7 119 135)))))()))(position((start_p(""7 119 123))(end_p(""7 119 135)))))((value(Read((value(Read((value(Variable((value(Id r1))(position((start_p(""7 119 139))(end_p(""7 119 141)))))()))(position((start_p(""7 119 139))(end_p(""7 119 141)))))))(position((start_p(""7 119 138))(end_p(""7 119 141)))))))(position((start_p(""7 119 136))(end_p(""7 119 142)))))))(position((start_p(""7 119 123))(end_p(""7 119 142)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""8 144 148))(end_p(""8 144 160)))))()))(position((start_p(""8 144 148))(end_p(""8 144 160)))))((value(Literal((value(LString".\n"))(position((start_p(""8 144 166))(end_p(""8 144 167)))))))(position((start_p(""8 144 161))(end_p(""8 144 168)))))))(position((start_p(""8 144 148))(end_p(""8 144 168))))))))(position((start_p(""7 119 123))(end_p(""8 144 168))))))))(position((start_p(""6 83 87))(end_p(""8 144 168))))))))(position((start_p(""5 67 71))(end_p(""8 144 168))))))))(position((start_p(""4 53 57))(end_p(""8 144 168)))))))))(position((start_p(""3 42 42))(end_p(""8 144 168))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/40-allocate-05.eval.hopix.human-readable b/flap/tests/02-Interpreter/40-allocate-05.eval.hopix.human-readable
new file mode 100644
index 0000000..a38221e
--- /dev/null
+++ b/flap/tests/02-Interpreter/40-allocate-05.eval.hopix.human-readable
@@ -0,0 +1,8 @@
+let r1 = ref (ref "KO")
+let r2 = ref "KO"
+let test =
+    r1 := r2;
+    r2 := "OK";
+    print_string ("This test is ");
+    print_string (!!r1);
+    print_string (".\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/40-allocate-05.expected b/flap/tests/02-Interpreter/40-allocate-05.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/40-allocate-05.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/41-allocate-06.eval.hopix b/flap/tests/02-Interpreter/41-allocate-06.eval.hopix
new file mode 100644
index 0000000..2db7e12
--- /dev/null
+++ b/flap/tests/02-Interpreter/41-allocate-06.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id f))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()((value(Ref((value(Fun(FunctionDefinition((value(PVariable((value(Id x))(position((start_p(""1 0 14))(end_p(""1 0 15)))))))(position((start_p(""1 0 14))(end_p(""1 0 15)))))((value(Variable((value(Id x))(position((start_p(""1 0 19))(end_p(""1 0 20)))))()))(position((start_p(""1 0 19))(end_p(""1 0 20))))))))(position((start_p(""1 0 12))(end_p(""1 0 21)))))))(position((start_p(""1 0 8))(end_p(""1 0 21)))))))))(position((start_p(""1 0 0))(end_p(""1 0 21)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""2 22 26))(end_p(""2 22 30)))))()((value(Sequence(((value(Assign((value(Variable((value(Id f))(position((start_p(""3 33 37))(end_p(""3 33 38)))))()))(position((start_p(""3 33 37))(end_p(""3 33 38)))))((value(Fun(FunctionDefinition((value(PVariable((value(Id x))(position((start_p(""3 33 44))(end_p(""3 33 45)))))))(position((start_p(""3 33 44))(end_p(""3 33 45)))))((value(Literal((value(LString"This test is OK.\n"))(position((start_p(""3 33 68))(end_p(""3 33 69)))))))(position((start_p(""3 33 68))(end_p(""3 33 69))))))))(position((start_p(""3 33 42))(end_p(""3 33 70)))))))(position((start_p(""3 33 37))(end_p(""3 33 70)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 72 76))(end_p(""4 72 88)))))()))(position((start_p(""4 72 76))(end_p(""4 72 88)))))((value(Apply((value(Read((value(Variable((value(Id f))(position((start_p(""4 72 91))(end_p(""4 72 92)))))()))(position((start_p(""4 72 91))(end_p(""4 72 92)))))))(position((start_p(""4 72 90))(end_p(""4 72 92)))))((value(Literal((value(LString"This test is KO.\n"))(position((start_p(""4 72 113))(end_p(""4 72 114)))))))(position((start_p(""4 72 93))(end_p(""4 72 115)))))))(position((start_p(""4 72 89))(end_p(""4 72 116)))))))(position((start_p(""4 72 76))(end_p(""4 72 116))))))))(position((start_p(""3 33 37))(end_p(""4 72 116)))))))))(position((start_p(""2 22 22))(end_p(""4 72 116))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/41-allocate-06.eval.hopix.human-readable b/flap/tests/02-Interpreter/41-allocate-06.eval.hopix.human-readable
new file mode 100644
index 0000000..fd4f242
--- /dev/null
+++ b/flap/tests/02-Interpreter/41-allocate-06.eval.hopix.human-readable
@@ -0,0 +1,4 @@
+let f = ref (\x -> x)
+let test =
+    f := (\x -> "This test is OK.\n");
+    print_string (!f ("This test is KO.\n"))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/41-allocate-06.expected b/flap/tests/02-Interpreter/41-allocate-06.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/41-allocate-06.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/42-match-01.eval.hopix b/flap/tests/02-Interpreter/42-match-01.eval.hopix
new file mode 100644
index 0000000..d3e1a63
--- /dev/null
+++ b/flap/tests/02-Interpreter/42-match-01.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Case((value(Tagged((value(KId Here))(position((start_p(""2 11 22))(end_p(""2 11 26)))))()()))(position((start_p(""2 11 22))(end_p(""2 11 26)))))(((value(Branch((value(PTaggedValue((value(KId Here))(position((start_p(""3 30 36))(end_p(""3 30 40)))))()()))(position((start_p(""3 30 36))(end_p(""3 30 40)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""3 30 47))(end_p(""3 30 59)))))()))(position((start_p(""3 30 47))(end_p(""3 30 59)))))((value(Literal((value(LString"This test is OK.\n"))(position((start_p(""3 30 80))(end_p(""3 30 81)))))))(position((start_p(""3 30 60))(end_p(""3 30 82)))))))(position((start_p(""3 30 47))(end_p(""3 30 82)))))))(position((start_p(""3 30 36))(end_p(""3 30 82)))))((value(Branch((value(PTaggedValue((value(KId NotHere))(position((start_p(""4 83 89))(end_p(""4 83 96)))))()()))(position((start_p(""4 83 89))(end_p(""4 83 96)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 83 100))(end_p(""4 83 112)))))()))(position((start_p(""4 83 100))(end_p(""4 83 112)))))((value(Literal((value(LString"This test is KO.\n"))(position((start_p(""4 83 133))(end_p(""4 83 134)))))))(position((start_p(""4 83 113))(end_p(""4 83 135)))))))(position((start_p(""4 83 100))(end_p(""4 83 135)))))))(position((start_p(""4 83 89))(end_p(""4 83 135))))))))(position((start_p(""2 11 15))(end_p(""5 136 141)))))))))(position((start_p(""1 0 0))(end_p(""5 136 141))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/42-match-01.eval.hopix.human-readable b/flap/tests/02-Interpreter/42-match-01.eval.hopix.human-readable
new file mode 100644
index 0000000..01fdfd2
--- /dev/null
+++ b/flap/tests/02-Interpreter/42-match-01.eval.hopix.human-readable
@@ -0,0 +1,5 @@
+let test =
+    match (Here) {
+    | Here    -> print_string ("This test is OK.\n")
+    | NotHere -> print_string ("This test is KO.\n")
+    }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/42-match-01.expected b/flap/tests/02-Interpreter/42-match-01.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/42-match-01.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/43-match-02.eval.hopix b/flap/tests/02-Interpreter/43-match-02.eval.hopix
new file mode 100644
index 0000000..87b0ab1
--- /dev/null
+++ b/flap/tests/02-Interpreter/43-match-02.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Case((value(Tagged((value(KId Here))(position((start_p(""2 11 22))(end_p(""2 11 26)))))()(((value(Literal((value(LString OK))(position((start_p(""2 11 31))(end_p(""2 11 32)))))))(position((start_p(""2 11 31))(end_p(""2 11 32))))))))(position((start_p(""2 11 22))(end_p(""2 11 33)))))(((value(Branch((value(PTaggedValue((value(KId Here))(position((start_p(""3 37 43))(end_p(""3 37 47)))))()(((value(PVariable((value(Id x))(position((start_p(""3 37 49))(end_p(""3 37 50)))))))(position((start_p(""3 37 49))(end_p(""3 37 50))))))))(position((start_p(""3 37 43))(end_p(""3 37 51)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""3 37 55))(end_p(""3 37 67)))))()))(position((start_p(""3 37 55))(end_p(""3 37 67)))))((value(Literal((value(LString"This test is "))(position((start_p(""3 37 83))(end_p(""3 37 84)))))))(position((start_p(""3 37 68))(end_p(""3 37 85)))))))(position((start_p(""3 37 55))(end_p(""3 37 85)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""3 37 87))(end_p(""3 37 99)))))()))(position((start_p(""3 37 87))(end_p(""3 37 99)))))((value(Variable((value(Id x))(position((start_p(""3 37 101))(end_p(""3 37 102)))))()))(position((start_p(""3 37 100))(end_p(""3 37 103)))))))(position((start_p(""3 37 87))(end_p(""3 37 103)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""3 37 105))(end_p(""3 37 117)))))()))(position((start_p(""3 37 105))(end_p(""3 37 117)))))((value(Literal((value(LString".\n"))(position((start_p(""3 37 123))(end_p(""3 37 124)))))))(position((start_p(""3 37 118))(end_p(""3 37 125)))))))(position((start_p(""3 37 105))(end_p(""3 37 125))))))))(position((start_p(""3 37 87))(end_p(""3 37 125))))))))(position((start_p(""3 37 55))(end_p(""3 37 125)))))))(position((start_p(""3 37 43))(end_p(""3 37 125)))))((value(Branch((value(PTaggedValue((value(KId NotHere))(position((start_p(""4 126 132))(end_p(""4 126 139)))))()()))(position((start_p(""4 126 132))(end_p(""4 126 139)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 126 144))(end_p(""4 126 156)))))()))(position((start_p(""4 126 144))(end_p(""4 126 156)))))((value(Literal((value(LString"This test is KO.\n"))(position((start_p(""4 126 177))(end_p(""4 126 178)))))))(position((start_p(""4 126 157))(end_p(""4 126 179)))))))(position((start_p(""4 126 144))(end_p(""4 126 179)))))))(position((start_p(""4 126 132))(end_p(""4 126 179))))))))(position((start_p(""2 11 15))(end_p(""5 180 185)))))))))(position((start_p(""1 0 0))(end_p(""5 180 185))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/43-match-02.eval.hopix.human-readable b/flap/tests/02-Interpreter/43-match-02.eval.hopix.human-readable
new file mode 100644
index 0000000..bae6f2b
--- /dev/null
+++ b/flap/tests/02-Interpreter/43-match-02.eval.hopix.human-readable
@@ -0,0 +1,5 @@
+let test =
+    match (Here ("OK")) {
+    | Here (x) -> print_string ("This test is "); print_string (x); print_string (".\n")
+    | NotHere  -> print_string ("This test is KO.\n")
+    }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/43-match-02.expected b/flap/tests/02-Interpreter/43-match-02.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/43-match-02.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/44-match-03.eval.hopix b/flap/tests/02-Interpreter/44-match-03.eval.hopix
new file mode 100644
index 0000000..cdecfeb
--- /dev/null
+++ b/flap/tests/02-Interpreter/44-match-03.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Case((value(Tagged((value(KId Here))(position((start_p(""2 11 22))(end_p(""2 11 26)))))()(((value(Literal((value(LString O))(position((start_p(""2 11 30))(end_p(""2 11 31)))))))(position((start_p(""2 11 30))(end_p(""2 11 31)))))((value(Literal((value(LString K))(position((start_p(""2 11 35))(end_p(""2 11 36)))))))(position((start_p(""2 11 35))(end_p(""2 11 36))))))))(position((start_p(""2 11 22))(end_p(""2 11 37)))))(((value(Branch((value(PTaggedValue((value(KId Here))(position((start_p(""3 41 47))(end_p(""3 41 51)))))()(((value(PVariable((value(Id x))(position((start_p(""3 41 53))(end_p(""3 41 54)))))))(position((start_p(""3 41 53))(end_p(""3 41 54)))))((value(PVariable((value(Id y))(position((start_p(""3 41 56))(end_p(""3 41 57)))))))(position((start_p(""3 41 56))(end_p(""3 41 57))))))))(position((start_p(""3 41 47))(end_p(""3 41 58)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 62 68))(end_p(""4 62 80)))))()))(position((start_p(""4 62 68))(end_p(""4 62 80)))))((value(Literal((value(LString"This test is "))(position((start_p(""4 62 96))(end_p(""4 62 97)))))))(position((start_p(""4 62 81))(end_p(""4 62 98)))))))(position((start_p(""4 62 68))(end_p(""4 62 98)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""5 100 106))(end_p(""5 100 118)))))()))(position((start_p(""5 100 106))(end_p(""5 100 118)))))((value(Variable((value(Id x))(position((start_p(""5 100 120))(end_p(""5 100 121)))))()))(position((start_p(""5 100 119))(end_p(""5 100 122)))))))(position((start_p(""5 100 106))(end_p(""5 100 122)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""6 124 130))(end_p(""6 124 142)))))()))(position((start_p(""6 124 130))(end_p(""6 124 142)))))((value(Variable((value(Id y))(position((start_p(""6 124 144))(end_p(""6 124 145)))))()))(position((start_p(""6 124 143))(end_p(""6 124 146)))))))(position((start_p(""6 124 130))(end_p(""6 124 146)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""7 148 154))(end_p(""7 148 166)))))()))(position((start_p(""7 148 154))(end_p(""7 148 166)))))((value(Literal((value(LString".\n"))(position((start_p(""7 148 172))(end_p(""7 148 173)))))))(position((start_p(""7 148 167))(end_p(""7 148 174)))))))(position((start_p(""7 148 154))(end_p(""7 148 174))))))))(position((start_p(""6 124 130))(end_p(""7 148 174))))))))(position((start_p(""5 100 106))(end_p(""7 148 174))))))))(position((start_p(""4 62 68))(end_p(""7 148 174)))))))(position((start_p(""3 41 47))(end_p(""7 148 174)))))((value(Branch((value(PTaggedValue((value(KId NotHere))(position((start_p(""8 175 181))(end_p(""8 175 188)))))()()))(position((start_p(""8 175 181))(end_p(""8 175 188)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""8 175 193))(end_p(""8 175 205)))))()))(position((start_p(""8 175 193))(end_p(""8 175 205)))))((value(Literal((value(LString"This test is KO.\n"))(position((start_p(""8 175 226))(end_p(""8 175 227)))))))(position((start_p(""8 175 206))(end_p(""8 175 228)))))))(position((start_p(""8 175 193))(end_p(""8 175 228)))))))(position((start_p(""8 175 181))(end_p(""8 175 228))))))))(position((start_p(""2 11 15))(end_p(""9 229 234)))))))))(position((start_p(""1 0 0))(end_p(""9 229 234))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/44-match-03.eval.hopix.human-readable b/flap/tests/02-Interpreter/44-match-03.eval.hopix.human-readable
new file mode 100644
index 0000000..3d0f59d
--- /dev/null
+++ b/flap/tests/02-Interpreter/44-match-03.eval.hopix.human-readable
@@ -0,0 +1,9 @@
+let test =
+    match (Here ("O", "K")) {
+    | Here (x, y) ->
+      print_string ("This test is ");
+      print_string (x);
+      print_string (y);
+      print_string (".\n")
+    | NotHere  -> print_string ("This test is KO.\n")
+    }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/44-match-03.expected b/flap/tests/02-Interpreter/44-match-03.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/44-match-03.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/45-match-04.eval.hopix b/flap/tests/02-Interpreter/45-match-04.eval.hopix
new file mode 100644
index 0000000..afb2502
--- /dev/null
+++ b/flap/tests/02-Interpreter/45-match-04.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Case((value(Tagged((value(KId Here))(position((start_p(""2 11 22))(end_p(""2 11 26)))))()(((value(Literal((value(LString O))(position((start_p(""2 11 30))(end_p(""2 11 31)))))))(position((start_p(""2 11 30))(end_p(""2 11 31)))))((value(Literal((value(LString K))(position((start_p(""2 11 35))(end_p(""2 11 36)))))))(position((start_p(""2 11 35))(end_p(""2 11 36)))))((value(Literal((value(LString".\n"))(position((start_p(""2 11 42))(end_p(""2 11 43)))))))(position((start_p(""2 11 42))(end_p(""2 11 43))))))))(position((start_p(""2 11 22))(end_p(""2 11 44)))))(((value(Branch((value(PTaggedValue((value(KId Here))(position((start_p(""3 48 54))(end_p(""3 48 58)))))()(((value(PVariable((value(Id x))(position((start_p(""3 48 60))(end_p(""3 48 61)))))))(position((start_p(""3 48 60))(end_p(""3 48 61)))))((value(PVariable((value(Id y))(position((start_p(""3 48 63))(end_p(""3 48 64)))))))(position((start_p(""3 48 63))(end_p(""3 48 64)))))((value(PVariable((value(Id z))(position((start_p(""3 48 66))(end_p(""3 48 67)))))))(position((start_p(""3 48 66))(end_p(""3 48 67))))))))(position((start_p(""3 48 54))(end_p(""3 48 68)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 72 78))(end_p(""4 72 90)))))()))(position((start_p(""4 72 78))(end_p(""4 72 90)))))((value(Literal((value(LString"This test is "))(position((start_p(""4 72 106))(end_p(""4 72 107)))))))(position((start_p(""4 72 91))(end_p(""4 72 108)))))))(position((start_p(""4 72 78))(end_p(""4 72 108)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""5 110 116))(end_p(""5 110 128)))))()))(position((start_p(""5 110 116))(end_p(""5 110 128)))))((value(Variable((value(Id x))(position((start_p(""5 110 130))(end_p(""5 110 131)))))()))(position((start_p(""5 110 129))(end_p(""5 110 132)))))))(position((start_p(""5 110 116))(end_p(""5 110 132)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""6 134 140))(end_p(""6 134 152)))))()))(position((start_p(""6 134 140))(end_p(""6 134 152)))))((value(Variable((value(Id y))(position((start_p(""6 134 154))(end_p(""6 134 155)))))()))(position((start_p(""6 134 153))(end_p(""6 134 156)))))))(position((start_p(""6 134 140))(end_p(""6 134 156)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""7 158 164))(end_p(""7 158 176)))))()))(position((start_p(""7 158 164))(end_p(""7 158 176)))))((value(Variable((value(Id z))(position((start_p(""7 158 178))(end_p(""7 158 179)))))()))(position((start_p(""7 158 177))(end_p(""7 158 180)))))))(position((start_p(""7 158 164))(end_p(""7 158 180))))))))(position((start_p(""6 134 140))(end_p(""7 158 180))))))))(position((start_p(""5 110 116))(end_p(""7 158 180))))))))(position((start_p(""4 72 78))(end_p(""7 158 180)))))))(position((start_p(""3 48 54))(end_p(""7 158 180)))))((value(Branch((value(PTaggedValue((value(KId NotHere))(position((start_p(""8 181 187))(end_p(""8 181 194)))))()()))(position((start_p(""8 181 187))(end_p(""8 181 194)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""8 181 198))(end_p(""8 181 210)))))()))(position((start_p(""8 181 198))(end_p(""8 181 210)))))((value(Literal((value(LString"This test is KO.\n"))(position((start_p(""8 181 231))(end_p(""8 181 232)))))))(position((start_p(""8 181 211))(end_p(""8 181 233)))))))(position((start_p(""8 181 198))(end_p(""8 181 233)))))))(position((start_p(""8 181 187))(end_p(""8 181 233))))))))(position((start_p(""2 11 15))(end_p(""9 234 239)))))))))(position((start_p(""1 0 0))(end_p(""9 234 239))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/45-match-04.eval.hopix.human-readable b/flap/tests/02-Interpreter/45-match-04.eval.hopix.human-readable
new file mode 100644
index 0000000..e3a7f00
--- /dev/null
+++ b/flap/tests/02-Interpreter/45-match-04.eval.hopix.human-readable
@@ -0,0 +1,9 @@
+let test =
+    match (Here ("O", "K", ".\n")) {
+    | Here (x, y, z) ->
+      print_string ("This test is ");
+      print_string (x);
+      print_string (y);
+      print_string (z)
+    | NotHere -> print_string ("This test is KO.\n")
+    }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/45-match-04.expected b/flap/tests/02-Interpreter/45-match-04.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/45-match-04.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/46-match-05.eval.hopix b/flap/tests/02-Interpreter/46-match-05.eval.hopix
new file mode 100644
index 0000000..869bada
--- /dev/null
+++ b/flap/tests/02-Interpreter/46-match-05.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Case((value(Tagged((value(KId Deep))(position((start_p(""2 11 22))(end_p(""2 11 26)))))()(((value(Tagged((value(KId Deep))(position((start_p(""2 11 28))(end_p(""2 11 32)))))()(((value(Tagged((value(KId Deep))(position((start_p(""2 11 34))(end_p(""2 11 38)))))()(((value(Tagged((value(KId Inside))(position((start_p(""2 11 40))(end_p(""2 11 46)))))()(((value(Literal((value(LString OK))(position((start_p(""2 11 51))(end_p(""2 11 52)))))))(position((start_p(""2 11 51))(end_p(""2 11 52))))))))(position((start_p(""2 11 40))(end_p(""2 11 53))))))))(position((start_p(""2 11 34))(end_p(""2 11 54))))))))(position((start_p(""2 11 28))(end_p(""2 11 55))))))))(position((start_p(""2 11 22))(end_p(""2 11 56)))))(((value(Branch((value(PTaggedValue((value(KId Deep))(position((start_p(""3 60 66))(end_p(""3 60 70)))))()(((value(PTaggedValue((value(KId Deep))(position((start_p(""3 60 72))(end_p(""3 60 76)))))()(((value(PTaggedValue((value(KId Deep))(position((start_p(""3 60 78))(end_p(""3 60 82)))))()(((value(PTaggedValue((value(KId Inside))(position((start_p(""3 60 84))(end_p(""3 60 90)))))()(((value(PVariable((value(Id you_find_me))(position((start_p(""3 60 92))(end_p(""3 60 103)))))))(position((start_p(""3 60 92))(end_p(""3 60 103))))))))(position((start_p(""3 60 84))(end_p(""3 60 104))))))))(position((start_p(""3 60 78))(end_p(""3 60 105))))))))(position((start_p(""3 60 72))(end_p(""3 60 106))))))))(position((start_p(""3 60 66))(end_p(""3 60 107)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 111 117))(end_p(""4 111 129)))))()))(position((start_p(""4 111 117))(end_p(""4 111 129)))))((value(Literal((value(LString"This test is "))(position((start_p(""4 111 145))(end_p(""4 111 146)))))))(position((start_p(""4 111 130))(end_p(""4 111 147)))))))(position((start_p(""4 111 117))(end_p(""4 111 147)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""5 149 155))(end_p(""5 149 167)))))()))(position((start_p(""5 149 155))(end_p(""5 149 167)))))((value(Variable((value(Id you_find_me))(position((start_p(""5 149 169))(end_p(""5 149 180)))))()))(position((start_p(""5 149 168))(end_p(""5 149 181)))))))(position((start_p(""5 149 155))(end_p(""5 149 181)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""6 183 189))(end_p(""6 183 201)))))()))(position((start_p(""6 183 189))(end_p(""6 183 201)))))((value(Literal((value(LString".\n"))(position((start_p(""6 183 207))(end_p(""6 183 208)))))))(position((start_p(""6 183 202))(end_p(""6 183 209)))))))(position((start_p(""6 183 189))(end_p(""6 183 209))))))))(position((start_p(""5 149 155))(end_p(""6 183 209))))))))(position((start_p(""4 111 117))(end_p(""6 183 209)))))))(position((start_p(""3 60 66))(end_p(""6 183 209))))))))(position((start_p(""2 11 15))(end_p(""7 210 215)))))))))(position((start_p(""1 0 0))(end_p(""7 210 215))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/46-match-05.eval.hopix.human-readable b/flap/tests/02-Interpreter/46-match-05.eval.hopix.human-readable
new file mode 100644
index 0000000..57deaed
--- /dev/null
+++ b/flap/tests/02-Interpreter/46-match-05.eval.hopix.human-readable
@@ -0,0 +1,7 @@
+let test =
+    match (Deep (Deep (Deep (Inside ("OK"))))) {
+    | Deep (Deep (Deep (Inside (you_find_me)))) ->
+      print_string ("This test is ");
+      print_string (you_find_me);
+      print_string (".\n")
+    }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/46-match-05.expected b/flap/tests/02-Interpreter/46-match-05.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/46-match-05.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/47-match-06.eval.hopix b/flap/tests/02-Interpreter/47-match-06.eval.hopix
new file mode 100644
index 0000000..fdba25d
--- /dev/null
+++ b/flap/tests/02-Interpreter/47-match-06.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Case((value(Tagged((value(KId Deep))(position((start_p(""2 11 22))(end_p(""2 11 26)))))()(((value(Tagged((value(KId Deep))(position((start_p(""2 11 28))(end_p(""2 11 32)))))()(((value(Tagged((value(KId Deep))(position((start_p(""2 11 34))(end_p(""2 11 38)))))()(((value(Tagged((value(KId Inside))(position((start_p(""2 11 40))(end_p(""2 11 46)))))()(((value(Literal((value(LString KO))(position((start_p(""2 11 51))(end_p(""2 11 52)))))))(position((start_p(""2 11 51))(end_p(""2 11 52)))))((value(Literal((value(LString KO))(position((start_p(""2 11 57))(end_p(""2 11 58)))))))(position((start_p(""2 11 57))(end_p(""2 11 58)))))((value(Literal((value(LString OK))(position((start_p(""2 11 63))(end_p(""2 11 64)))))))(position((start_p(""2 11 63))(end_p(""2 11 64))))))))(position((start_p(""2 11 40))(end_p(""2 11 65))))))))(position((start_p(""2 11 34))(end_p(""2 11 66))))))))(position((start_p(""2 11 28))(end_p(""2 11 67))))))))(position((start_p(""2 11 22))(end_p(""2 11 68)))))(((value(Branch((value(PTaggedValue((value(KId Deep))(position((start_p(""3 72 78))(end_p(""3 72 82)))))()(((value(PTaggedValue((value(KId Deep))(position((start_p(""3 72 84))(end_p(""3 72 88)))))()(((value(PTaggedValue((value(KId Deep))(position((start_p(""3 72 90))(end_p(""3 72 94)))))()(((value(PTaggedValue((value(KId Inside))(position((start_p(""3 72 96))(end_p(""3 72 102)))))()(((value(PVariable((value(Id not_here))(position((start_p(""3 72 104))(end_p(""3 72 112)))))))(position((start_p(""3 72 104))(end_p(""3 72 112)))))((value(PVariable((value(Id neither_here))(position((start_p(""3 72 114))(end_p(""3 72 126)))))))(position((start_p(""3 72 114))(end_p(""3 72 126)))))((value(PVariable((value(Id you_found_me))(position((start_p(""3 72 128))(end_p(""3 72 140)))))))(position((start_p(""3 72 128))(end_p(""3 72 140))))))))(position((start_p(""3 72 96))(end_p(""3 72 141))))))))(position((start_p(""3 72 90))(end_p(""3 72 142))))))))(position((start_p(""3 72 84))(end_p(""3 72 143))))))))(position((start_p(""3 72 78))(end_p(""3 72 144)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 148 154))(end_p(""4 148 166)))))()))(position((start_p(""4 148 154))(end_p(""4 148 166)))))((value(Literal((value(LString"This test is "))(position((start_p(""4 148 182))(end_p(""4 148 183)))))))(position((start_p(""4 148 167))(end_p(""4 148 184)))))))(position((start_p(""4 148 154))(end_p(""4 148 184)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""5 186 192))(end_p(""5 186 204)))))()))(position((start_p(""5 186 192))(end_p(""5 186 204)))))((value(Variable((value(Id you_found_me))(position((start_p(""5 186 206))(end_p(""5 186 218)))))()))(position((start_p(""5 186 205))(end_p(""5 186 219)))))))(position((start_p(""5 186 192))(end_p(""5 186 219)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""6 221 227))(end_p(""6 221 239)))))()))(position((start_p(""6 221 227))(end_p(""6 221 239)))))((value(Literal((value(LString".\n"))(position((start_p(""6 221 245))(end_p(""6 221 246)))))))(position((start_p(""6 221 240))(end_p(""6 221 247)))))))(position((start_p(""6 221 227))(end_p(""6 221 247))))))))(position((start_p(""5 186 192))(end_p(""6 221 247))))))))(position((start_p(""4 148 154))(end_p(""6 221 247)))))))(position((start_p(""3 72 78))(end_p(""6 221 247))))))))(position((start_p(""2 11 15))(end_p(""7 248 253)))))))))(position((start_p(""1 0 0))(end_p(""7 248 253))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/47-match-06.eval.hopix.human-readable b/flap/tests/02-Interpreter/47-match-06.eval.hopix.human-readable
new file mode 100644
index 0000000..f33d9ab
--- /dev/null
+++ b/flap/tests/02-Interpreter/47-match-06.eval.hopix.human-readable
@@ -0,0 +1,7 @@
+let test =
+    match (Deep (Deep (Deep (Inside ("KO", "KO", "OK"))))) {
+    | Deep (Deep (Deep (Inside (not_here, neither_here, you_found_me)))) ->
+      print_string ("This test is ");
+      print_string (you_found_me);
+      print_string (".\n")
+    }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/47-match-06.expected b/flap/tests/02-Interpreter/47-match-06.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/47-match-06.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/48-match-07.eval.hopix b/flap/tests/02-Interpreter/48-match-07.eval.hopix
new file mode 100644
index 0000000..f78cb47
--- /dev/null
+++ b/flap/tests/02-Interpreter/48-match-07.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Case((value(Tagged((value(KId Deep))(position((start_p(""2 11 22))(end_p(""2 11 26)))))()(((value(Tagged((value(KId Deep))(position((start_p(""2 11 28))(end_p(""2 11 32)))))()(((value(Tagged((value(KId Deep))(position((start_p(""2 11 34))(end_p(""2 11 38)))))()(((value(Tagged((value(KId Inside))(position((start_p(""2 11 40))(end_p(""2 11 46)))))()(((value(Literal((value(LString KO))(position((start_p(""2 11 51))(end_p(""2 11 52)))))))(position((start_p(""2 11 51))(end_p(""2 11 52)))))((value(Literal((value(LString KO))(position((start_p(""2 11 57))(end_p(""2 11 58)))))))(position((start_p(""2 11 57))(end_p(""2 11 58)))))((value(Literal((value(LString OK))(position((start_p(""2 11 63))(end_p(""2 11 64)))))))(position((start_p(""2 11 63))(end_p(""2 11 64))))))))(position((start_p(""2 11 40))(end_p(""2 11 65))))))))(position((start_p(""2 11 34))(end_p(""2 11 66))))))))(position((start_p(""2 11 28))(end_p(""2 11 67))))))))(position((start_p(""2 11 22))(end_p(""2 11 68)))))(((value(Branch((value(PTaggedValue((value(KId Deep))(position((start_p(""3 72 78))(end_p(""3 72 82)))))()(((value(PTaggedValue((value(KId Deep))(position((start_p(""3 72 84))(end_p(""3 72 88)))))()(((value(PTaggedValue((value(KId Deep))(position((start_p(""3 72 90))(end_p(""3 72 94)))))()(((value(POr(((value(PTaggedValue((value(KId NotHere))(position((start_p(""3 72 96))(end_p(""3 72 103)))))()()))(position((start_p(""3 72 96))(end_p(""3 72 103)))))((value(PTaggedValue((value(KId Inside))(position((start_p(""3 72 106))(end_p(""3 72 112)))))()(((value(PVariable((value(Id not_here))(position((start_p(""3 72 114))(end_p(""3 72 122)))))))(position((start_p(""3 72 114))(end_p(""3 72 122)))))((value(PVariable((value(Id neither_here))(position((start_p(""3 72 124))(end_p(""3 72 136)))))))(position((start_p(""3 72 124))(end_p(""3 72 136)))))((value(PVariable((value(Id you_found_me))(position((start_p(""3 72 138))(end_p(""3 72 150)))))))(position((start_p(""3 72 138))(end_p(""3 72 150))))))))(position((start_p(""3 72 106))(end_p(""3 72 151))))))))(position((start_p(""3 72 96))(end_p(""3 72 151))))))))(position((start_p(""3 72 90))(end_p(""3 72 152))))))))(position((start_p(""3 72 84))(end_p(""3 72 153))))))))(position((start_p(""3 72 78))(end_p(""3 72 154)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 158 164))(end_p(""4 158 176)))))()))(position((start_p(""4 158 164))(end_p(""4 158 176)))))((value(Literal((value(LString"This test is "))(position((start_p(""4 158 192))(end_p(""4 158 193)))))))(position((start_p(""4 158 177))(end_p(""4 158 194)))))))(position((start_p(""4 158 164))(end_p(""4 158 194)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""5 196 202))(end_p(""5 196 214)))))()))(position((start_p(""5 196 202))(end_p(""5 196 214)))))((value(Variable((value(Id you_found_me))(position((start_p(""5 196 216))(end_p(""5 196 228)))))()))(position((start_p(""5 196 215))(end_p(""5 196 229)))))))(position((start_p(""5 196 202))(end_p(""5 196 229)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""6 231 237))(end_p(""6 231 249)))))()))(position((start_p(""6 231 237))(end_p(""6 231 249)))))((value(Literal((value(LString".\n"))(position((start_p(""6 231 255))(end_p(""6 231 256)))))))(position((start_p(""6 231 250))(end_p(""6 231 257)))))))(position((start_p(""6 231 237))(end_p(""6 231 257))))))))(position((start_p(""5 196 202))(end_p(""6 231 257))))))))(position((start_p(""4 158 164))(end_p(""6 231 257)))))))(position((start_p(""3 72 78))(end_p(""6 231 257))))))))(position((start_p(""2 11 15))(end_p(""7 258 263)))))))))(position((start_p(""1 0 0))(end_p(""7 258 263))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/48-match-07.eval.hopix.human-readable b/flap/tests/02-Interpreter/48-match-07.eval.hopix.human-readable
new file mode 100644
index 0000000..d388570
--- /dev/null
+++ b/flap/tests/02-Interpreter/48-match-07.eval.hopix.human-readable
@@ -0,0 +1,7 @@
+let test =
+    match (Deep (Deep (Deep (Inside ("KO", "KO", "OK"))))) {
+    | Deep (Deep (Deep (NotHere | Inside (not_here, neither_here, you_found_me)))) ->
+      print_string ("This test is ");
+      print_string (you_found_me);
+      print_string (".\n")
+    }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/48-match-07.expected b/flap/tests/02-Interpreter/48-match-07.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/48-match-07.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/49-match-08.eval.hopix b/flap/tests/02-Interpreter/49-match-08.eval.hopix
new file mode 100644
index 0000000..126ac06
--- /dev/null
+++ b/flap/tests/02-Interpreter/49-match-08.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Case((value(Tagged((value(KId Deep))(position((start_p(""2 11 22))(end_p(""2 11 26)))))()(((value(Tagged((value(KId Deep))(position((start_p(""2 11 28))(end_p(""2 11 32)))))()(((value(Tagged((value(KId Deep))(position((start_p(""2 11 34))(end_p(""2 11 38)))))()(((value(Tagged((value(KId Inside))(position((start_p(""2 11 40))(end_p(""2 11 46)))))()(((value(Literal((value(LString KO))(position((start_p(""2 11 51))(end_p(""2 11 52)))))))(position((start_p(""2 11 51))(end_p(""2 11 52)))))((value(Literal((value(LString KO))(position((start_p(""2 11 57))(end_p(""2 11 58)))))))(position((start_p(""2 11 57))(end_p(""2 11 58)))))((value(Literal((value(LString OK))(position((start_p(""2 11 63))(end_p(""2 11 64)))))))(position((start_p(""2 11 63))(end_p(""2 11 64))))))))(position((start_p(""2 11 40))(end_p(""2 11 65))))))))(position((start_p(""2 11 34))(end_p(""2 11 66))))))))(position((start_p(""2 11 28))(end_p(""2 11 67))))))))(position((start_p(""2 11 22))(end_p(""2 11 68)))))(((value(Branch((value(PTaggedValue((value(KId Deep))(position((start_p(""3 72 78))(end_p(""3 72 82)))))()(((value(POr(((value(PTaggedValue((value(KId NotHere))(position((start_p(""3 72 84))(end_p(""3 72 91)))))()()))(position((start_p(""3 72 84))(end_p(""3 72 91)))))((value(PTaggedValue((value(KId Deep))(position((start_p(""3 72 94))(end_p(""3 72 98)))))()(((value(PTaggedValue((value(KId Deep))(position((start_p(""3 72 100))(end_p(""3 72 104)))))()(((value(POr(((value(PTaggedValue((value(KId NotHere))(position((start_p(""3 72 106))(end_p(""3 72 113)))))()()))(position((start_p(""3 72 106))(end_p(""3 72 113)))))((value(PTaggedValue((value(KId Inside))(position((start_p(""3 72 116))(end_p(""3 72 122)))))()(((value(PVariable((value(Id not_here))(position((start_p(""3 72 124))(end_p(""3 72 132)))))))(position((start_p(""3 72 124))(end_p(""3 72 132)))))((value(PVariable((value(Id neither_here))(position((start_p(""3 72 134))(end_p(""3 72 146)))))))(position((start_p(""3 72 134))(end_p(""3 72 146)))))((value(PVariable((value(Id you_found_me))(position((start_p(""3 72 148))(end_p(""3 72 160)))))))(position((start_p(""3 72 148))(end_p(""3 72 160))))))))(position((start_p(""3 72 116))(end_p(""3 72 161))))))))(position((start_p(""3 72 106))(end_p(""3 72 161))))))))(position((start_p(""3 72 100))(end_p(""3 72 162))))))))(position((start_p(""3 72 94))(end_p(""3 72 163))))))))(position((start_p(""3 72 84))(end_p(""3 72 163))))))))(position((start_p(""3 72 78))(end_p(""3 72 164)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 168 174))(end_p(""4 168 186)))))()))(position((start_p(""4 168 174))(end_p(""4 168 186)))))((value(Literal((value(LString"This test is "))(position((start_p(""4 168 202))(end_p(""4 168 203)))))))(position((start_p(""4 168 187))(end_p(""4 168 204)))))))(position((start_p(""4 168 174))(end_p(""4 168 204)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""5 206 212))(end_p(""5 206 224)))))()))(position((start_p(""5 206 212))(end_p(""5 206 224)))))((value(Variable((value(Id you_found_me))(position((start_p(""5 206 226))(end_p(""5 206 238)))))()))(position((start_p(""5 206 225))(end_p(""5 206 239)))))))(position((start_p(""5 206 212))(end_p(""5 206 239)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""6 241 247))(end_p(""6 241 259)))))()))(position((start_p(""6 241 247))(end_p(""6 241 259)))))((value(Literal((value(LString".\n"))(position((start_p(""6 241 265))(end_p(""6 241 266)))))))(position((start_p(""6 241 260))(end_p(""6 241 267)))))))(position((start_p(""6 241 247))(end_p(""6 241 267))))))))(position((start_p(""5 206 212))(end_p(""6 241 267))))))))(position((start_p(""4 168 174))(end_p(""6 241 267)))))))(position((start_p(""3 72 78))(end_p(""6 241 267))))))))(position((start_p(""2 11 15))(end_p(""7 268 273)))))))))(position((start_p(""1 0 0))(end_p(""7 268 273))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/49-match-08.eval.hopix.human-readable b/flap/tests/02-Interpreter/49-match-08.eval.hopix.human-readable
new file mode 100644
index 0000000..9a61301
--- /dev/null
+++ b/flap/tests/02-Interpreter/49-match-08.eval.hopix.human-readable
@@ -0,0 +1,7 @@
+let test =
+    match (Deep (Deep (Deep (Inside ("KO", "KO", "OK"))))) {
+    | Deep (NotHere | Deep (Deep (NotHere | Inside (not_here, neither_here, you_found_me)))) ->
+      print_string ("This test is ");
+      print_string (you_found_me);
+      print_string (".\n")
+    }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/49-match-08.expected b/flap/tests/02-Interpreter/49-match-08.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/49-match-08.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/50-match-09.eval.hopix b/flap/tests/02-Interpreter/50-match-09.eval.hopix
new file mode 100644
index 0000000..15163b1
--- /dev/null
+++ b/flap/tests/02-Interpreter/50-match-09.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Case((value(Tagged((value(KId K))(position((start_p(""2 11 22))(end_p(""2 11 23)))))()(((value(Literal((value(LString OK))(position((start_p(""2 11 28))(end_p(""2 11 29)))))))(position((start_p(""2 11 28))(end_p(""2 11 29))))))))(position((start_p(""2 11 22))(end_p(""2 11 30)))))(((value(Branch((value(PTaggedValue((value(KId K))(position((start_p(""3 34 40))(end_p(""3 34 41)))))()(((value(PAnd(((value(PVariable((value(Id x))(position((start_p(""3 34 43))(end_p(""3 34 44)))))))(position((start_p(""3 34 43))(end_p(""3 34 44)))))((value(PVariable((value(Id y))(position((start_p(""3 34 47))(end_p(""3 34 48)))))))(position((start_p(""3 34 47))(end_p(""3 34 48))))))))(position((start_p(""3 34 43))(end_p(""3 34 48))))))))(position((start_p(""3 34 40))(end_p(""3 34 49)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 53 59))(end_p(""4 53 71)))))()))(position((start_p(""4 53 59))(end_p(""4 53 71)))))((value(Literal((value(LString"This test is "))(position((start_p(""4 53 87))(end_p(""4 53 88)))))))(position((start_p(""4 53 72))(end_p(""4 53 89)))))))(position((start_p(""4 53 59))(end_p(""4 53 89)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""5 91 97))(end_p(""5 91 109)))))()))(position((start_p(""5 91 97))(end_p(""5 91 109)))))((value(Variable((value(Id x))(position((start_p(""5 91 111))(end_p(""5 91 112)))))()))(position((start_p(""5 91 110))(end_p(""5 91 113)))))))(position((start_p(""5 91 97))(end_p(""5 91 113)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""6 115 121))(end_p(""6 115 133)))))()))(position((start_p(""6 115 121))(end_p(""6 115 133)))))((value(Literal((value(LString" and "))(position((start_p(""6 115 141))(end_p(""6 115 142)))))))(position((start_p(""6 115 134))(end_p(""6 115 143)))))))(position((start_p(""6 115 121))(end_p(""6 115 143)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""7 145 151))(end_p(""7 145 163)))))()))(position((start_p(""7 145 151))(end_p(""7 145 163)))))((value(Variable((value(Id y))(position((start_p(""7 145 165))(end_p(""7 145 166)))))()))(position((start_p(""7 145 164))(end_p(""7 145 167)))))))(position((start_p(""7 145 151))(end_p(""7 145 167)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""8 169 175))(end_p(""8 169 187)))))()))(position((start_p(""8 169 175))(end_p(""8 169 187)))))((value(Literal((value(LString".\n"))(position((start_p(""8 169 193))(end_p(""8 169 194)))))))(position((start_p(""8 169 188))(end_p(""8 169 195)))))))(position((start_p(""8 169 175))(end_p(""8 169 195))))))))(position((start_p(""7 145 151))(end_p(""8 169 195))))))))(position((start_p(""6 115 121))(end_p(""8 169 195))))))))(position((start_p(""5 91 97))(end_p(""8 169 195))))))))(position((start_p(""4 53 59))(end_p(""8 169 195)))))))(position((start_p(""3 34 40))(end_p(""8 169 195))))))))(position((start_p(""2 11 15))(end_p(""9 196 201)))))))))(position((start_p(""1 0 0))(end_p(""9 196 201))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/50-match-09.eval.hopix.human-readable b/flap/tests/02-Interpreter/50-match-09.eval.hopix.human-readable
new file mode 100644
index 0000000..19b747a
--- /dev/null
+++ b/flap/tests/02-Interpreter/50-match-09.eval.hopix.human-readable
@@ -0,0 +1,9 @@
+let test =
+    match (K ("OK")) {
+    | K (x & y) ->
+      print_string ("This test is ");
+      print_string (x);
+      print_string (" and ");
+      print_string (y);
+      print_string (".\n")
+    }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/50-match-09.expected b/flap/tests/02-Interpreter/50-match-09.expected
new file mode 100644
index 0000000..7e65012
--- /dev/null
+++ b/flap/tests/02-Interpreter/50-match-09.expected
@@ -0,0 +1 @@
+This test is OK and OK.
diff --git a/flap/tests/02-Interpreter/51-match-10.eval.hopix b/flap/tests/02-Interpreter/51-match-10.eval.hopix
new file mode 100644
index 0000000..b7231b5
--- /dev/null
+++ b/flap/tests/02-Interpreter/51-match-10.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Case((value(Tagged((value(KId K))(position((start_p(""2 11 22))(end_p(""2 11 23)))))()(((value(Tagged((value(KId K))(position((start_p(""2 11 25))(end_p(""2 11 26)))))()(((value(Literal((value(LString OK))(position((start_p(""2 11 31))(end_p(""2 11 32)))))))(position((start_p(""2 11 31))(end_p(""2 11 32))))))))(position((start_p(""2 11 25))(end_p(""2 11 33))))))))(position((start_p(""2 11 22))(end_p(""2 11 34)))))(((value(Branch((value(PTaggedValue((value(KId K))(position((start_p(""3 38 44))(end_p(""3 38 45)))))()(((value(PAnd(((value(PVariable((value(Id x))(position((start_p(""3 38 47))(end_p(""3 38 48)))))))(position((start_p(""3 38 47))(end_p(""3 38 48)))))((value(PTaggedValue((value(KId K))(position((start_p(""3 38 51))(end_p(""3 38 52)))))()(((value(PVariable((value(Id y))(position((start_p(""3 38 54))(end_p(""3 38 55)))))))(position((start_p(""3 38 54))(end_p(""3 38 55))))))))(position((start_p(""3 38 51))(end_p(""3 38 56))))))))(position((start_p(""3 38 47))(end_p(""3 38 56))))))))(position((start_p(""3 38 44))(end_p(""3 38 57)))))((value(Case((value(Variable((value(Id x))(position((start_p(""4 61 74))(end_p(""4 61 75)))))()))(position((start_p(""4 61 74))(end_p(""4 61 75)))))(((value(Branch((value(PTaggedValue((value(KId K))(position((start_p(""5 79 87))(end_p(""5 79 88)))))()(((value(PVariable((value(Id z))(position((start_p(""5 79 90))(end_p(""5 79 91)))))))(position((start_p(""5 79 90))(end_p(""5 79 91))))))))(position((start_p(""5 79 87))(end_p(""5 79 92)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""6 96 105))(end_p(""6 96 117)))))()))(position((start_p(""6 96 105))(end_p(""6 96 117)))))((value(Literal((value(LString"This test is "))(position((start_p(""6 96 133))(end_p(""6 96 134)))))))(position((start_p(""6 96 118))(end_p(""6 96 135)))))))(position((start_p(""6 96 105))(end_p(""6 96 135)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""7 137 146))(end_p(""7 137 158)))))()))(position((start_p(""7 137 146))(end_p(""7 137 158)))))((value(Variable((value(Id y))(position((start_p(""7 137 160))(end_p(""7 137 161)))))()))(position((start_p(""7 137 159))(end_p(""7 137 162)))))))(position((start_p(""7 137 146))(end_p(""7 137 162)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""8 164 173))(end_p(""8 164 185)))))()))(position((start_p(""8 164 173))(end_p(""8 164 185)))))((value(Literal((value(LString".\n"))(position((start_p(""8 164 191))(end_p(""8 164 192)))))))(position((start_p(""8 164 186))(end_p(""8 164 193)))))))(position((start_p(""8 164 173))(end_p(""8 164 193))))))))(position((start_p(""7 137 146))(end_p(""8 164 193))))))))(position((start_p(""6 96 105))(end_p(""8 164 193)))))))(position((start_p(""5 79 87))(end_p(""8 164 193))))))))(position((start_p(""4 61 67))(end_p(""9 194 201)))))))(position((start_p(""3 38 44))(end_p(""9 194 201))))))))(position((start_p(""2 11 15))(end_p(""10 202 207)))))))))(position((start_p(""1 0 0))(end_p(""10 202 207))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/51-match-10.eval.hopix.human-readable b/flap/tests/02-Interpreter/51-match-10.eval.hopix.human-readable
new file mode 100644
index 0000000..a5950da
--- /dev/null
+++ b/flap/tests/02-Interpreter/51-match-10.eval.hopix.human-readable
@@ -0,0 +1,10 @@
+let test =
+    match (K (K ("OK"))) {
+    | K (x & K (y)) ->
+      match (x) {
+      | K (z) ->
+         print_string ("This test is ");
+         print_string (y);
+         print_string (".\n")
+      }
+    }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/51-match-10.expected b/flap/tests/02-Interpreter/51-match-10.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/51-match-10.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/52-match-11.eval.hopix b/flap/tests/02-Interpreter/52-match-11.eval.hopix
new file mode 100644
index 0000000..41fefe3
--- /dev/null
+++ b/flap/tests/02-Interpreter/52-match-11.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Case((value(Tagged((value(KId K))(position((start_p(""2 11 22))(end_p(""2 11 23)))))()(((value(Tagged((value(KId K))(position((start_p(""2 11 25))(end_p(""2 11 26)))))()(((value(Literal((value(LString OK))(position((start_p(""2 11 31))(end_p(""2 11 32)))))))(position((start_p(""2 11 31))(end_p(""2 11 32))))))))(position((start_p(""2 11 25))(end_p(""2 11 33))))))))(position((start_p(""2 11 22))(end_p(""2 11 34)))))(((value(Branch((value PWildcard)(position((start_p(""3 38 44))(end_p(""3 38 45)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 49 58))(end_p(""4 49 70)))))()))(position((start_p(""4 49 58))(end_p(""4 49 70)))))((value(Literal((value(LString"This test is too easy.\n"))(position((start_p(""4 49 97))(end_p(""4 49 98)))))))(position((start_p(""4 49 71))(end_p(""4 49 99)))))))(position((start_p(""4 49 58))(end_p(""4 49 99)))))))(position((start_p(""3 38 44))(end_p(""4 49 99))))))))(position((start_p(""2 11 15))(end_p(""5 100 105)))))))))(position((start_p(""1 0 0))(end_p(""5 100 105))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/52-match-11.eval.hopix.human-readable b/flap/tests/02-Interpreter/52-match-11.eval.hopix.human-readable
new file mode 100644
index 0000000..e05e159
--- /dev/null
+++ b/flap/tests/02-Interpreter/52-match-11.eval.hopix.human-readable
@@ -0,0 +1,5 @@
+let test =
+    match (K (K ("OK"))) {
+    | _ ->
+         print_string ("This test is too easy.\n")
+    }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/52-match-11.expected b/flap/tests/02-Interpreter/52-match-11.expected
new file mode 100644
index 0000000..f5c21c8
--- /dev/null
+++ b/flap/tests/02-Interpreter/52-match-11.expected
@@ -0,0 +1 @@
+This test is too easy.
diff --git a/flap/tests/02-Interpreter/53-match-12.eval.hopix b/flap/tests/02-Interpreter/53-match-12.eval.hopix
new file mode 100644
index 0000000..42bb175
--- /dev/null
+++ b/flap/tests/02-Interpreter/53-match-12.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id write))(position((start_p(""1 0 4))(end_p(""1 0 9)))))()((value(Fun(FunctionDefinition((value(PVariable((value(Id x))(position((start_p(""1 0 13))(end_p(""1 0 14)))))))(position((start_p(""1 0 13))(end_p(""1 0 14)))))((value(Case((value(Variable((value(Id x))(position((start_p(""2 18 27))(end_p(""2 18 28)))))()))(position((start_p(""2 18 27))(end_p(""2 18 28)))))(((value(Branch((value(PTaggedValue((value(KId O))(position((start_p(""3 32 36))(end_p(""3 32 37)))))()()))(position((start_p(""3 32 36))(end_p(""3 32 37)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""3 32 41))(end_p(""3 32 53)))))()))(position((start_p(""3 32 41))(end_p(""3 32 53)))))((value(Literal((value(LString O))(position((start_p(""3 32 57))(end_p(""3 32 58)))))))(position((start_p(""3 32 54))(end_p(""3 32 59)))))))(position((start_p(""3 32 41))(end_p(""3 32 59)))))))(position((start_p(""3 32 36))(end_p(""3 32 59)))))((value(Branch((value(PTaggedValue((value(KId K))(position((start_p(""4 60 64))(end_p(""4 60 65)))))()()))(position((start_p(""4 60 64))(end_p(""4 60 65)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""4 60 69))(end_p(""4 60 81)))))()))(position((start_p(""4 60 69))(end_p(""4 60 81)))))((value(Literal((value(LString K))(position((start_p(""4 60 85))(end_p(""4 60 86)))))))(position((start_p(""4 60 82))(end_p(""4 60 87)))))))(position((start_p(""4 60 69))(end_p(""4 60 87)))))))(position((start_p(""4 60 64))(end_p(""4 60 87)))))((value(Branch((value(PTaggedValue((value(KId D))(position((start_p(""5 88 92))(end_p(""5 88 93)))))()()))(position((start_p(""5 88 92))(end_p(""5 88 93)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""5 88 97))(end_p(""5 88 109)))))()))(position((start_p(""5 88 97))(end_p(""5 88 109)))))((value(Literal((value(LString .))(position((start_p(""5 88 113))(end_p(""5 88 114)))))))(position((start_p(""5 88 110))(end_p(""5 88 115)))))))(position((start_p(""5 88 97))(end_p(""5 88 115)))))))(position((start_p(""5 88 92))(end_p(""5 88 115)))))((value(Branch((value(PTaggedValue((value(KId N))(position((start_p(""6 116 120))(end_p(""6 116 121)))))()()))(position((start_p(""6 116 120))(end_p(""6 116 121)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""6 116 125))(end_p(""6 116 137)))))()))(position((start_p(""6 116 125))(end_p(""6 116 137)))))((value(Literal((value(LString"\n"))(position((start_p(""6 116 142))(end_p(""6 116 143)))))))(position((start_p(""6 116 138))(end_p(""6 116 144)))))))(position((start_p(""6 116 125))(end_p(""6 116 144)))))))(position((start_p(""6 116 120))(end_p(""6 116 144))))))))(position((start_p(""2 18 20))(end_p(""7 145 148))))))))(position((start_p(""1 0 12))(end_p(""7 145 148)))))))))(position((start_p(""1 0 0))(end_p(""7 145 148)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""9 150 154))(end_p(""9 150 158)))))()((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""10 161 163))(end_p(""10 161 175)))))()))(position((start_p(""10 161 163))(end_p(""10 161 175)))))((value(Literal((value(LString"This test is "))(position((start_p(""10 161 191))(end_p(""10 161 192)))))))(position((start_p(""10 161 176))(end_p(""10 161 193)))))))(position((start_p(""10 161 163))(end_p(""10 161 193)))))((value(Sequence(((value(Apply((value(Variable((value(Id write))(position((start_p(""11 195 197))(end_p(""11 195 202)))))()))(position((start_p(""11 195 197))(end_p(""11 195 202)))))((value(Tagged((value(KId O))(position((start_p(""11 195 204))(end_p(""11 195 205)))))()()))(position((start_p(""11 195 203))(end_p(""11 195 206)))))))(position((start_p(""11 195 197))(end_p(""11 195 206)))))((value(Sequence(((value(Apply((value(Variable((value(Id write))(position((start_p(""12 208 210))(end_p(""12 208 215)))))()))(position((start_p(""12 208 210))(end_p(""12 208 215)))))((value(Tagged((value(KId K))(position((start_p(""12 208 217))(end_p(""12 208 218)))))()()))(position((start_p(""12 208 216))(end_p(""12 208 219)))))))(position((start_p(""12 208 210))(end_p(""12 208 219)))))((value(Sequence(((value(Apply((value(Variable((value(Id write))(position((start_p(""13 221 223))(end_p(""13 221 228)))))()))(position((start_p(""13 221 223))(end_p(""13 221 228)))))((value(Tagged((value(KId D))(position((start_p(""13 221 230))(end_p(""13 221 231)))))()()))(position((start_p(""13 221 229))(end_p(""13 221 232)))))))(position((start_p(""13 221 223))(end_p(""13 221 232)))))((value(Apply((value(Variable((value(Id write))(position((start_p(""14 234 236))(end_p(""14 234 241)))))()))(position((start_p(""14 234 236))(end_p(""14 234 241)))))((value(Tagged((value(KId N))(position((start_p(""14 234 243))(end_p(""14 234 244)))))()()))(position((start_p(""14 234 242))(end_p(""14 234 245)))))))(position((start_p(""14 234 236))(end_p(""14 234 245))))))))(position((start_p(""13 221 223))(end_p(""14 234 245))))))))(position((start_p(""12 208 210))(end_p(""14 234 245))))))))(position((start_p(""11 195 197))(end_p(""14 234 245))))))))(position((start_p(""10 161 163))(end_p(""14 234 245)))))))))(position((start_p(""9 150 150))(end_p(""14 234 245))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/53-match-12.eval.hopix.human-readable b/flap/tests/02-Interpreter/53-match-12.eval.hopix.human-readable
new file mode 100644
index 0000000..9c1c264
--- /dev/null
+++ b/flap/tests/02-Interpreter/53-match-12.eval.hopix.human-readable
@@ -0,0 +1,14 @@
+let write = \x ->
+  match (x) {
+  | O -> print_string ("O")
+  | K -> print_string ("K")
+  | D -> print_string (".")
+  | N -> print_string ("\n")
+  }
+
+let test =
+  print_string ("This test is ");
+  write (O);
+  write (K);
+  write (D);
+  write (N)
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/53-match-12.expected b/flap/tests/02-Interpreter/53-match-12.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/53-match-12.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/54-match-13.eval.hopix b/flap/tests/02-Interpreter/54-match-13.eval.hopix
new file mode 100644
index 0000000..95c863e
--- /dev/null
+++ b/flap/tests/02-Interpreter/54-match-13.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(RecFunctions((((value(Id show))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()(FunctionDefinition((value(PVariable((value(Id l))(position((start_p(""1 0 10))(end_p(""1 0 11)))))))(position((start_p(""1 0 9))(end_p(""1 0 12)))))((value(Case((value(Variable((value(Id l))(position((start_p(""2 15 24))(end_p(""2 15 25)))))()))(position((start_p(""2 15 24))(end_p(""2 15 25)))))(((value(Branch((value(PTaggedValue((value(KId N))(position((start_p(""2 15 29))(end_p(""2 15 30)))))()()))(position((start_p(""2 15 29))(end_p(""2 15 30)))))((value(Variable((value(Id nothing))(position((start_p(""2 15 34))(end_p(""2 15 41)))))()))(position((start_p(""2 15 34))(end_p(""2 15 41)))))))(position((start_p(""2 15 29))(end_p(""2 15 41)))))((value(Branch((value(PTaggedValue((value(KId C))(position((start_p(""2 15 44))(end_p(""2 15 45)))))()(((value(PVariable((value(Id x))(position((start_p(""2 15 47))(end_p(""2 15 48)))))))(position((start_p(""2 15 47))(end_p(""2 15 48)))))((value(PVariable((value(Id xs))(position((start_p(""2 15 50))(end_p(""2 15 52)))))))(position((start_p(""2 15 50))(end_p(""2 15 52))))))))(position((start_p(""2 15 44))(end_p(""2 15 53)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""2 15 57))(end_p(""2 15 69)))))()))(position((start_p(""2 15 57))(end_p(""2 15 69)))))((value(Variable((value(Id x))(position((start_p(""2 15 71))(end_p(""2 15 72)))))()))(position((start_p(""2 15 70))(end_p(""2 15 73)))))))(position((start_p(""2 15 57))(end_p(""2 15 73)))))((value(Apply((value(Variable((value(Id show))(position((start_p(""2 15 75))(end_p(""2 15 79)))))()))(position((start_p(""2 15 75))(end_p(""2 15 79)))))((value(Variable((value(Id xs))(position((start_p(""2 15 81))(end_p(""2 15 83)))))()))(position((start_p(""2 15 80))(end_p(""2 15 84)))))))(position((start_p(""2 15 75))(end_p(""2 15 84))))))))(position((start_p(""2 15 57))(end_p(""2 15 84)))))))(position((start_p(""2 15 44))(end_p(""2 15 84))))))))(position((start_p(""2 15 17))(end_p(""2 15 86)))))))))))(position((start_p(""1 0 0))(end_p(""2 15 86)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""4 88 92))(end_p(""4 88 96)))))()((value(Apply((value(Variable((value(Id show))(position((start_p(""5 99 101))(end_p(""5 99 105)))))()))(position((start_p(""5 99 101))(end_p(""5 99 105)))))((value(Tagged((value(KId C))(position((start_p(""5 99 107))(end_p(""5 99 108)))))()(((value(Literal((value(LString This))(position((start_p(""5 99 115))(end_p(""5 99 116)))))))(position((start_p(""5 99 115))(end_p(""5 99 116)))))((value(Tagged((value(KId C))(position((start_p(""5 99 118))(end_p(""5 99 119)))))()(((value(Literal((value(LString" test is "))(position((start_p(""5 99 131))(end_p(""5 99 132)))))))(position((start_p(""5 99 131))(end_p(""5 99 132)))))((value(Tagged((value(KId C))(position((start_p(""5 99 134))(end_p(""5 99 135)))))()(((value(Literal((value(LString OK))(position((start_p(""5 99 140))(end_p(""5 99 141)))))))(position((start_p(""5 99 140))(end_p(""5 99 141)))))((value(Tagged((value(KId C))(position((start_p(""5 99 143))(end_p(""5 99 144)))))()(((value(Literal((value(LString".\n."))(position((start_p(""5 99 151))(end_p(""5 99 152)))))))(position((start_p(""5 99 151))(end_p(""5 99 152)))))((value(Tagged((value(KId N))(position((start_p(""5 99 154))(end_p(""5 99 155)))))()()))(position((start_p(""5 99 154))(end_p(""5 99 155))))))))(position((start_p(""5 99 143))(end_p(""5 99 156))))))))(position((start_p(""5 99 134))(end_p(""5 99 157))))))))(position((start_p(""5 99 118))(end_p(""5 99 158))))))))(position((start_p(""5 99 106))(end_p(""5 99 160)))))))(position((start_p(""5 99 101))(end_p(""5 99 160)))))))))(position((start_p(""4 88 88))(end_p(""5 99 160))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/54-match-13.eval.hopix.human-readable b/flap/tests/02-Interpreter/54-match-13.eval.hopix.human-readable
new file mode 100644
index 0000000..a23c1e1
--- /dev/null
+++ b/flap/tests/02-Interpreter/54-match-13.eval.hopix.human-readable
@@ -0,0 +1,5 @@
+fun show (l) =
+  match (l) { N -> nothing | C (x, xs) -> print_string (x); show (xs) }
+
+let test =
+  show (C ("This", C (" test is ", C ("OK", C (".\n.", N)))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/54-match-13.expected b/flap/tests/02-Interpreter/54-match-13.expected
new file mode 100644
index 0000000..814b7e4
--- /dev/null
+++ b/flap/tests/02-Interpreter/54-match-13.expected
@@ -0,0 +1,2 @@
+This test is OK.
+.
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/55-if-01.eval.hopix b/flap/tests/02-Interpreter/55-if-01.eval.hopix
new file mode 100644
index 0000000..ff9837a
--- /dev/null
+++ b/flap/tests/02-Interpreter/55-if-01.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(RecFunctions((((value(Id f))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()(FunctionDefinition((value(PVariable((value(Id x))(position((start_p(""1 0 7))(end_p(""1 0 8)))))))(position((start_p(""1 0 6))(end_p(""1 0 9)))))((value(IfThenElse((value(Apply((value(Apply((value(Variable((value(Id `>?`))(position((start_p(""2 12 20))(end_p(""2 12 22)))))()))(position((start_p(""2 12 20))(end_p(""2 12 22)))))((value(Variable((value(Id x))(position((start_p(""2 12 18))(end_p(""2 12 19)))))()))(position((start_p(""2 12 18))(end_p(""2 12 19)))))))(position((start_p(""2 12 18))(end_p(""2 12 19)))))((value(Literal((value(LInt 0))(position((start_p(""2 12 23))(end_p(""2 12 24)))))))(position((start_p(""2 12 23))(end_p(""2 12 24)))))))(position((start_p(""2 12 17))(end_p(""2 12 25)))))((value(Literal((value(LString OK))(position((start_p(""2 12 36))(end_p(""2 12 37)))))))(position((start_p(""2 12 36))(end_p(""2 12 37)))))((value(Literal((value(LString KO))(position((start_p(""2 12 50))(end_p(""2 12 51)))))))(position((start_p(""2 12 50))(end_p(""2 12 51)))))))(position((start_p(""2 12 14))(end_p(""2 12 53)))))))))))(position((start_p(""1 0 0))(end_p(""2 12 53)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""4 55 59))(end_p(""4 55 63)))))()((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""5 66 68))(end_p(""5 66 80)))))()))(position((start_p(""5 66 68))(end_p(""5 66 80)))))((value(Literal((value(LString"This test is "))(position((start_p(""5 66 96))(end_p(""5 66 97)))))))(position((start_p(""5 66 81))(end_p(""5 66 98)))))))(position((start_p(""5 66 68))(end_p(""5 66 98)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""6 100 102))(end_p(""6 100 114)))))()))(position((start_p(""6 100 102))(end_p(""6 100 114)))))((value(Apply((value(Variable((value(Id f))(position((start_p(""6 100 116))(end_p(""6 100 117)))))()))(position((start_p(""6 100 116))(end_p(""6 100 117)))))((value(Literal((value(LInt 33))(position((start_p(""6 100 119))(end_p(""6 100 121)))))))(position((start_p(""6 100 118))(end_p(""6 100 122)))))))(position((start_p(""6 100 115))(end_p(""6 100 123)))))))(position((start_p(""6 100 102))(end_p(""6 100 123)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""7 125 127))(end_p(""7 125 139)))))()))(position((start_p(""7 125 127))(end_p(""7 125 139)))))((value(Literal((value(LString".\n"))(position((start_p(""7 125 145))(end_p(""7 125 146)))))))(position((start_p(""7 125 140))(end_p(""7 125 147)))))))(position((start_p(""7 125 127))(end_p(""7 125 147))))))))(position((start_p(""6 100 102))(end_p(""7 125 147))))))))(position((start_p(""5 66 68))(end_p(""7 125 147)))))))))(position((start_p(""4 55 55))(end_p(""7 125 147))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/55-if-01.eval.hopix.human-readable b/flap/tests/02-Interpreter/55-if-01.eval.hopix.human-readable
new file mode 100644
index 0000000..0a62b30
--- /dev/null
+++ b/flap/tests/02-Interpreter/55-if-01.eval.hopix.human-readable
@@ -0,0 +1,7 @@
+fun f (x) =
+  if (x >? 0) then { "OK" } else { "KO" }
+
+let test =
+  print_string ("This test is ");
+  print_string (f (33));
+  print_string (".\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/55-if-01.expected b/flap/tests/02-Interpreter/55-if-01.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/55-if-01.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/56-if-02.eval.hopix b/flap/tests/02-Interpreter/56-if-02.eval.hopix
new file mode 100644
index 0000000..15f3d1f
--- /dev/null
+++ b/flap/tests/02-Interpreter/56-if-02.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(RecFunctions((((value(Id f))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()(FunctionDefinition((value(PVariable((value(Id x))(position((start_p(""1 0 7))(end_p(""1 0 8)))))))(position((start_p(""1 0 6))(end_p(""1 0 9)))))((value(IfThenElse((value(Apply((value(Apply((value(Variable((value(Id `>?`))(position((start_p(""2 12 20))(end_p(""2 12 22)))))()))(position((start_p(""2 12 20))(end_p(""2 12 22)))))((value(Variable((value(Id x))(position((start_p(""2 12 18))(end_p(""2 12 19)))))()))(position((start_p(""2 12 18))(end_p(""2 12 19)))))))(position((start_p(""2 12 18))(end_p(""2 12 19)))))((value(Literal((value(LInt 0))(position((start_p(""2 12 23))(end_p(""2 12 24)))))))(position((start_p(""2 12 23))(end_p(""2 12 24)))))))(position((start_p(""2 12 17))(end_p(""2 12 25)))))((value(IfThenElse((value(Apply((value(Apply((value(Variable((value(Id `>?`))(position((start_p(""3 33 43))(end_p(""3 33 45)))))()))(position((start_p(""3 33 43))(end_p(""3 33 45)))))((value(Variable((value(Id x))(position((start_p(""3 33 41))(end_p(""3 33 42)))))()))(position((start_p(""3 33 41))(end_p(""3 33 42)))))))(position((start_p(""3 33 41))(end_p(""3 33 42)))))((value(Literal((value(LInt 1))(position((start_p(""3 33 46))(end_p(""3 33 47)))))))(position((start_p(""3 33 46))(end_p(""3 33 47)))))))(position((start_p(""3 33 40))(end_p(""3 33 48)))))((value(Literal((value(LString OK))(position((start_p(""3 33 59))(end_p(""3 33 60)))))))(position((start_p(""3 33 59))(end_p(""3 33 60)))))((value(Literal((value(LString KO))(position((start_p(""4 63 77))(end_p(""4 63 78)))))))(position((start_p(""4 63 77))(end_p(""4 63 78)))))))(position((start_p(""3 33 37))(end_p(""4 63 80)))))((value(Literal((value(LString KO))(position((start_p(""5 81 95))(end_p(""5 81 96)))))))(position((start_p(""5 81 95))(end_p(""5 81 96)))))))(position((start_p(""2 12 14))(end_p(""5 81 98)))))))))))(position((start_p(""1 0 0))(end_p(""5 81 98)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""7 100 104))(end_p(""7 100 108)))))()((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""8 111 113))(end_p(""8 111 125)))))()))(position((start_p(""8 111 113))(end_p(""8 111 125)))))((value(Literal((value(LString"This test is "))(position((start_p(""8 111 141))(end_p(""8 111 142)))))))(position((start_p(""8 111 126))(end_p(""8 111 143)))))))(position((start_p(""8 111 113))(end_p(""8 111 143)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""9 145 147))(end_p(""9 145 159)))))()))(position((start_p(""9 145 147))(end_p(""9 145 159)))))((value(Apply((value(Variable((value(Id f))(position((start_p(""9 145 161))(end_p(""9 145 162)))))()))(position((start_p(""9 145 161))(end_p(""9 145 162)))))((value(Literal((value(LInt 33))(position((start_p(""9 145 164))(end_p(""9 145 166)))))))(position((start_p(""9 145 163))(end_p(""9 145 167)))))))(position((start_p(""9 145 160))(end_p(""9 145 168)))))))(position((start_p(""9 145 147))(end_p(""9 145 168)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""10 170 172))(end_p(""10 170 184)))))()))(position((start_p(""10 170 172))(end_p(""10 170 184)))))((value(Literal((value(LString".\n"))(position((start_p(""10 170 190))(end_p(""10 170 191)))))))(position((start_p(""10 170 185))(end_p(""10 170 192)))))))(position((start_p(""10 170 172))(end_p(""10 170 192))))))))(position((start_p(""9 145 147))(end_p(""10 170 192))))))))(position((start_p(""8 111 113))(end_p(""10 170 192)))))))))(position((start_p(""7 100 100))(end_p(""10 170 192))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/56-if-02.eval.hopix.human-readable b/flap/tests/02-Interpreter/56-if-02.eval.hopix.human-readable
new file mode 100644
index 0000000..dfbc8e5
--- /dev/null
+++ b/flap/tests/02-Interpreter/56-if-02.eval.hopix.human-readable
@@ -0,0 +1,10 @@
+fun f (x) =
+  if (x >? 0) then {
+    if (x >? 1) then { "OK" }
+    else { "KO" }
+  } else { "KO" }
+
+let test =
+  print_string ("This test is ");
+  print_string (f (33));
+  print_string (".\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/56-if-02.expected b/flap/tests/02-Interpreter/56-if-02.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/56-if-02.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/57-if-03.eval.hopix b/flap/tests/02-Interpreter/57-if-03.eval.hopix
new file mode 100644
index 0000000..f92aff7
--- /dev/null
+++ b/flap/tests/02-Interpreter/57-if-03.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(RecFunctions((((value(Id f))(position((start_p(""1 0 4))(end_p(""1 0 5)))))()(FunctionDefinition((value(PVariable((value(Id x))(position((start_p(""1 0 7))(end_p(""1 0 8)))))))(position((start_p(""1 0 6))(end_p(""1 0 9)))))((value(IfThenElse((value(Apply((value(Apply((value(Variable((value(Id `>?`))(position((start_p(""2 12 20))(end_p(""2 12 22)))))()))(position((start_p(""2 12 20))(end_p(""2 12 22)))))((value(Variable((value(Id x))(position((start_p(""2 12 18))(end_p(""2 12 19)))))()))(position((start_p(""2 12 18))(end_p(""2 12 19)))))))(position((start_p(""2 12 18))(end_p(""2 12 19)))))((value(Literal((value(LInt 0))(position((start_p(""2 12 23))(end_p(""2 12 24)))))))(position((start_p(""2 12 23))(end_p(""2 12 24)))))))(position((start_p(""2 12 17))(end_p(""2 12 25)))))((value(Literal((value(LString KO))(position((start_p(""2 12 36))(end_p(""2 12 37)))))))(position((start_p(""2 12 36))(end_p(""2 12 37)))))((value(IfThenElse((value(Apply((value(Apply((value(Variable((value(Id `<?`))(position((start_p(""3 40 55))(end_p(""3 40 57)))))()))(position((start_p(""3 40 55))(end_p(""3 40 57)))))((value(Variable((value(Id x))(position((start_p(""3 40 53))(end_p(""3 40 54)))))()))(position((start_p(""3 40 53))(end_p(""3 40 54)))))))(position((start_p(""3 40 53))(end_p(""3 40 54)))))((value(Literal((value(LInt 0))(position((start_p(""3 40 58))(end_p(""3 40 59)))))))(position((start_p(""3 40 58))(end_p(""3 40 59)))))))(position((start_p(""3 40 52))(end_p(""3 40 60)))))((value(Literal((value(LString KO))(position((start_p(""3 40 71))(end_p(""3 40 72)))))))(position((start_p(""3 40 71))(end_p(""3 40 72)))))((value(Literal((value(LString OK))(position((start_p(""4 75 87))(end_p(""4 75 88)))))))(position((start_p(""4 75 87))(end_p(""4 75 88)))))))(position((start_p(""3 40 49))(end_p(""4 75 90)))))))(position((start_p(""2 12 14))(end_p(""4 75 92)))))))))))(position((start_p(""1 0 0))(end_p(""4 75 92)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""6 94 98))(end_p(""6 94 102)))))()((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""7 105 107))(end_p(""7 105 119)))))()))(position((start_p(""7 105 107))(end_p(""7 105 119)))))((value(Literal((value(LString"This test is "))(position((start_p(""7 105 135))(end_p(""7 105 136)))))))(position((start_p(""7 105 120))(end_p(""7 105 137)))))))(position((start_p(""7 105 107))(end_p(""7 105 137)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""8 139 141))(end_p(""8 139 153)))))()))(position((start_p(""8 139 141))(end_p(""8 139 153)))))((value(Apply((value(Variable((value(Id f))(position((start_p(""8 139 155))(end_p(""8 139 156)))))()))(position((start_p(""8 139 155))(end_p(""8 139 156)))))((value(Literal((value(LInt 0))(position((start_p(""8 139 158))(end_p(""8 139 159)))))))(position((start_p(""8 139 157))(end_p(""8 139 160)))))))(position((start_p(""8 139 154))(end_p(""8 139 161)))))))(position((start_p(""8 139 141))(end_p(""8 139 161)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""9 163 165))(end_p(""9 163 177)))))()))(position((start_p(""9 163 165))(end_p(""9 163 177)))))((value(Literal((value(LString".\n"))(position((start_p(""9 163 183))(end_p(""9 163 184)))))))(position((start_p(""9 163 178))(end_p(""9 163 185)))))))(position((start_p(""9 163 165))(end_p(""9 163 185))))))))(position((start_p(""8 139 141))(end_p(""9 163 185))))))))(position((start_p(""7 105 107))(end_p(""9 163 185)))))))))(position((start_p(""6 94 94))(end_p(""9 163 185))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/57-if-03.eval.hopix.human-readable b/flap/tests/02-Interpreter/57-if-03.eval.hopix.human-readable
new file mode 100644
index 0000000..7370f46
--- /dev/null
+++ b/flap/tests/02-Interpreter/57-if-03.eval.hopix.human-readable
@@ -0,0 +1,9 @@
+fun f (x) =
+  if (x >? 0) then { "KO" }
+  else { if (x <? 0) then { "KO" }
+  else { "OK" } }
+
+let test =
+  print_string ("This test is ");
+  print_string (f (0));
+  print_string (".\n")
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/57-if-03.expected b/flap/tests/02-Interpreter/57-if-03.expected
new file mode 100644
index 0000000..1ac32ce
--- /dev/null
+++ b/flap/tests/02-Interpreter/57-if-03.expected
@@ -0,0 +1 @@
+This test is OK.
diff --git a/flap/tests/02-Interpreter/58-while-01.eval.hopix b/flap/tests/02-Interpreter/58-while-01.eval.hopix
new file mode 100644
index 0000000..377c6ec
--- /dev/null
+++ b/flap/tests/02-Interpreter/58-while-01.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Define(SimpleValue(((value(Id x))(position((start_p(""2 11 19))(end_p(""2 11 20)))))()((value(Ref((value(Literal((value(LInt 5))(position((start_p(""2 11 27))(end_p(""2 11 28)))))))(position((start_p(""2 11 27))(end_p(""2 11 28)))))))(position((start_p(""2 11 23))(end_p(""2 11 28)))))))((value(Define(SimpleValue(((value(Id y))(position((start_p(""3 30 38))(end_p(""3 30 39)))))()((value(Ref((value(Literal((value(LInt 0))(position((start_p(""3 30 46))(end_p(""3 30 47)))))))(position((start_p(""3 30 46))(end_p(""3 30 47)))))))(position((start_p(""3 30 42))(end_p(""3 30 47)))))))((value(Sequence(((value(While((value(Apply((value(Apply((value(Variable((value(Id `>?`))(position((start_p(""4 49 63))(end_p(""4 49 65)))))()))(position((start_p(""4 49 63))(end_p(""4 49 65)))))((value(Read((value(Variable((value(Id x))(position((start_p(""4 49 61))(end_p(""4 49 62)))))()))(position((start_p(""4 49 61))(end_p(""4 49 62)))))))(position((start_p(""4 49 60))(end_p(""4 49 62)))))))(position((start_p(""4 49 60))(end_p(""4 49 62)))))((value(Literal((value(LInt 0))(position((start_p(""4 49 66))(end_p(""4 49 67)))))))(position((start_p(""4 49 66))(end_p(""4 49 67)))))))(position((start_p(""4 49 60))(end_p(""4 49 67)))))((value(Sequence(((value(Assign((value(Variable((value(Id x))(position((start_p(""5 71 77))(end_p(""5 71 78)))))()))(position((start_p(""5 71 77))(end_p(""5 71 78)))))((value(Apply((value(Apply((value(Variable((value(Id `-`))(position((start_p(""5 71 85))(end_p(""5 71 86)))))()))(position((start_p(""5 71 85))(end_p(""5 71 86)))))((value(Read((value(Variable((value(Id x))(position((start_p(""5 71 83))(end_p(""5 71 84)))))()))(position((start_p(""5 71 83))(end_p(""5 71 84)))))))(position((start_p(""5 71 82))(end_p(""5 71 84)))))))(position((start_p(""5 71 82))(end_p(""5 71 84)))))((value(Literal((value(LInt 1))(position((start_p(""5 71 87))(end_p(""5 71 88)))))))(position((start_p(""5 71 87))(end_p(""5 71 88)))))))(position((start_p(""5 71 82))(end_p(""5 71 88)))))))(position((start_p(""5 71 77))(end_p(""5 71 88)))))((value(Assign((value(Variable((value(Id y))(position((start_p(""6 90 96))(end_p(""6 90 97)))))()))(position((start_p(""6 90 96))(end_p(""6 90 97)))))((value(Apply((value(Apply((value(Variable((value(Id `+`))(position((start_p(""6 90 104))(end_p(""6 90 105)))))()))(position((start_p(""6 90 104))(end_p(""6 90 105)))))((value(Read((value(Variable((value(Id y))(position((start_p(""6 90 102))(end_p(""6 90 103)))))()))(position((start_p(""6 90 102))(end_p(""6 90 103)))))))(position((start_p(""6 90 101))(end_p(""6 90 103)))))))(position((start_p(""6 90 101))(end_p(""6 90 103)))))((value(Literal((value(LInt 1))(position((start_p(""6 90 106))(end_p(""6 90 107)))))))(position((start_p(""6 90 106))(end_p(""6 90 107)))))))(position((start_p(""6 90 101))(end_p(""6 90 107)))))))(position((start_p(""6 90 96))(end_p(""6 90 107))))))))(position((start_p(""5 71 77))(end_p(""6 90 107)))))))(position((start_p(""4 49 53))(end_p(""7 108 113)))))((value(IfThenElse((value(Apply((value(Apply((value(Variable((value(Id `=?`))(position((start_p(""8 115 126))(end_p(""8 115 128)))))()))(position((start_p(""8 115 126))(end_p(""8 115 128)))))((value(Read((value(Variable((value(Id y))(position((start_p(""8 115 124))(end_p(""8 115 125)))))()))(position((start_p(""8 115 124))(end_p(""8 115 125)))))))(position((start_p(""8 115 123))(end_p(""8 115 125)))))))(position((start_p(""8 115 123))(end_p(""8 115 125)))))((value(Literal((value(LInt 5))(position((start_p(""8 115 129))(end_p(""8 115 130)))))))(position((start_p(""8 115 129))(end_p(""8 115 130)))))))(position((start_p(""8 115 122))(end_p(""8 115 131)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""9 139 145))(end_p(""9 139 157)))))()))(position((start_p(""9 139 145))(end_p(""9 139 157)))))((value(Literal((value(LString"This test is OK!\n"))(position((start_p(""9 139 178))(end_p(""9 139 179)))))))(position((start_p(""9 139 158))(end_p(""9 139 180)))))))(position((start_p(""9 139 145))(end_p(""9 139 180)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""11 194 200))(end_p(""11 194 212)))))()))(position((start_p(""11 194 200))(end_p(""11 194 212)))))((value(Literal((value(LString"This is KO!\n"))(position((start_p(""11 194 228))(end_p(""11 194 229)))))))(position((start_p(""11 194 213))(end_p(""11 194 230)))))))(position((start_p(""11 194 200))(end_p(""11 194 230)))))))(position((start_p(""8 115 119))(end_p(""12 231 236))))))))(position((start_p(""4 49 53))(end_p(""12 231 236)))))))(position((start_p(""3 30 34))(end_p(""12 231 236)))))))(position((start_p(""2 11 15))(end_p(""12 231 236)))))))))(position((start_p(""1 0 0))(end_p(""12 231 236))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/58-while-01.eval.hopix.human-readable b/flap/tests/02-Interpreter/58-while-01.eval.hopix.human-readable
new file mode 100644
index 0000000..29a0ae8
--- /dev/null
+++ b/flap/tests/02-Interpreter/58-while-01.eval.hopix.human-readable
@@ -0,0 +1,12 @@
+let test =
+    let x = ref 5;
+    let y = ref 0;
+    while (!x >? 0) {
+      x := !x - 1;
+      y := !y + 1
+    };
+    if (!y =? 5) then {
+      print_string ("This test is OK!\n")
+    } else {
+      print_string ("This is KO!\n")
+    }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/58-while-01.expected b/flap/tests/02-Interpreter/58-while-01.expected
new file mode 100644
index 0000000..e930c03
--- /dev/null
+++ b/flap/tests/02-Interpreter/58-while-01.expected
@@ -0,0 +1 @@
+This test is OK!
diff --git a/flap/tests/02-Interpreter/59-while-02.eval.hopix b/flap/tests/02-Interpreter/59-while-02.eval.hopix
new file mode 100644
index 0000000..38ec83e
--- /dev/null
+++ b/flap/tests/02-Interpreter/59-while-02.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Define(SimpleValue(((value(Id x))(position((start_p(""2 11 19))(end_p(""2 11 20)))))()((value(Ref((value(Literal((value(LInt 5))(position((start_p(""2 11 27))(end_p(""2 11 28)))))))(position((start_p(""2 11 27))(end_p(""2 11 28)))))))(position((start_p(""2 11 23))(end_p(""2 11 28)))))))((value(Define(SimpleValue(((value(Id y))(position((start_p(""3 30 38))(end_p(""3 30 39)))))()((value(Ref((value(Literal((value(LInt 0))(position((start_p(""3 30 46))(end_p(""3 30 47)))))))(position((start_p(""3 30 46))(end_p(""3 30 47)))))))(position((start_p(""3 30 42))(end_p(""3 30 47)))))))((value(Define(SimpleValue(((value(Id z))(position((start_p(""4 49 57))(end_p(""4 49 58)))))()((value(Ref((value(Literal((value(LInt 5))(position((start_p(""4 49 65))(end_p(""4 49 66)))))))(position((start_p(""4 49 65))(end_p(""4 49 66)))))))(position((start_p(""4 49 61))(end_p(""4 49 66)))))))((value(Sequence(((value(While((value(Apply((value(Apply((value(Variable((value(Id `>?`))(position((start_p(""5 68 82))(end_p(""5 68 84)))))()))(position((start_p(""5 68 82))(end_p(""5 68 84)))))((value(Read((value(Variable((value(Id x))(position((start_p(""5 68 80))(end_p(""5 68 81)))))()))(position((start_p(""5 68 80))(end_p(""5 68 81)))))))(position((start_p(""5 68 79))(end_p(""5 68 81)))))))(position((start_p(""5 68 79))(end_p(""5 68 81)))))((value(Literal((value(LInt 0))(position((start_p(""5 68 85))(end_p(""5 68 86)))))))(position((start_p(""5 68 85))(end_p(""5 68 86)))))))(position((start_p(""5 68 79))(end_p(""5 68 86)))))((value(Sequence(((value(Assign((value(Variable((value(Id x))(position((start_p(""6 90 96))(end_p(""6 90 97)))))()))(position((start_p(""6 90 96))(end_p(""6 90 97)))))((value(Apply((value(Apply((value(Variable((value(Id `-`))(position((start_p(""6 90 104))(end_p(""6 90 105)))))()))(position((start_p(""6 90 104))(end_p(""6 90 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173)))))))(position((start_p(""7 109 115))(end_p(""10 174 181)))))((value(Assign((value(Variable((value(Id y))(position((start_p(""11 183 189))(end_p(""11 183 190)))))()))(position((start_p(""11 183 189))(end_p(""11 183 190)))))((value(Apply((value(Apply((value(Variable((value(Id `+`))(position((start_p(""11 183 197))(end_p(""11 183 198)))))()))(position((start_p(""11 183 197))(end_p(""11 183 198)))))((value(Read((value(Variable((value(Id y))(position((start_p(""11 183 195))(end_p(""11 183 196)))))()))(position((start_p(""11 183 195))(end_p(""11 183 196)))))))(position((start_p(""11 183 194))(end_p(""11 183 196)))))))(position((start_p(""11 183 194))(end_p(""11 183 196)))))((value(Literal((value(LInt 1))(position((start_p(""11 183 199))(end_p(""11 183 200)))))))(position((start_p(""11 183 199))(end_p(""11 183 200)))))))(position((start_p(""11 183 194))(end_p(""11 183 200)))))))(position((start_p(""11 183 189))(end_p(""11 183 200))))))))(position((start_p(""7 109 115))(end_p(""11 183 200))))))))(position((start_p(""6 90 96))(end_p(""11 183 200)))))))(position((start_p(""5 68 72))(end_p(""12 201 206)))))((value(IfThenElse((value(Apply((value(Apply((value(Variable((value(Id `=?`))(position((start_p(""13 208 219))(end_p(""13 208 221)))))()))(position((start_p(""13 208 219))(end_p(""13 208 221)))))((value(Read((value(Variable((value(Id y))(position((start_p(""13 208 217))(end_p(""13 208 218)))))()))(position((start_p(""13 208 217))(end_p(""13 208 218)))))))(position((start_p(""13 208 216))(end_p(""13 208 218)))))))(position((start_p(""13 208 216))(end_p(""13 208 218)))))((value(Literal((value(LInt 10))(position((start_p(""13 208 222))(end_p(""13 208 224)))))))(position((start_p(""13 208 222))(end_p(""13 208 224)))))))(position((start_p(""13 208 215))(end_p(""13 208 225)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""14 233 239))(end_p(""14 233 251)))))()))(position((start_p(""14 233 239))(end_p(""14 233 251)))))((value(Literal((value(LString"This test is OK!\n"))(position((start_p(""14 233 272))(end_p(""14 233 273)))))))(position((start_p(""14 233 252))(end_p(""14 233 274)))))))(position((start_p(""14 233 239))(end_p(""14 233 274)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""16 288 294))(end_p(""16 288 306)))))()))(position((start_p(""16 288 294))(end_p(""16 288 306)))))((value(Literal((value(LString"This is KO!\n"))(position((start_p(""16 288 322))(end_p(""16 288 323)))))))(position((start_p(""16 288 307))(end_p(""16 288 324)))))))(position((start_p(""16 288 294))(end_p(""16 288 324)))))))(position((start_p(""13 208 212))(end_p(""17 325 330))))))))(position((start_p(""5 68 72))(end_p(""17 325 330)))))))(position((start_p(""4 49 53))(end_p(""17 325 330)))))))(position((start_p(""3 30 34))(end_p(""17 325 330)))))))(position((start_p(""2 11 15))(end_p(""17 325 330)))))))))(position((start_p(""1 0 0))(end_p(""17 325 330))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/59-while-02.eval.hopix.human-readable b/flap/tests/02-Interpreter/59-while-02.eval.hopix.human-readable
new file mode 100644
index 0000000..7cd739b
--- /dev/null
+++ b/flap/tests/02-Interpreter/59-while-02.eval.hopix.human-readable
@@ -0,0 +1,17 @@
+let test =
+    let x = ref 5;
+    let y = ref 0;
+    let z = ref 5;
+    while (!x >? 0) {
+      x := !x - 1;
+      while (!z >? 0) {
+        y := !y + 1;
+        z := !z - 1
+      };
+      y := !y + 1
+    };
+    if (!y =? 10) then {
+      print_string ("This test is OK!\n")
+    } else {
+      print_string ("This is KO!\n")
+    }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/59-while-02.expected b/flap/tests/02-Interpreter/59-while-02.expected
new file mode 100644
index 0000000..e930c03
--- /dev/null
+++ b/flap/tests/02-Interpreter/59-while-02.expected
@@ -0,0 +1 @@
+This test is OK!
diff --git a/flap/tests/02-Interpreter/60-while-03.eval.hopix b/flap/tests/02-Interpreter/60-while-03.eval.hopix
new file mode 100644
index 0000000..da2895b
--- /dev/null
+++ b/flap/tests/02-Interpreter/60-while-03.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Define(SimpleValue(((value(Id x))(position((start_p(""2 11 19))(end_p(""2 11 20)))))()((value(Ref((value(Literal((value(LInt 5))(position((start_p(""2 11 27))(end_p(""2 11 28)))))))(position((start_p(""2 11 27))(end_p(""2 11 28)))))))(position((start_p(""2 11 23))(end_p(""2 11 28)))))))((value(Define(SimpleValue(((value(Id y))(position((start_p(""3 30 38))(end_p(""3 30 39)))))()((value(Ref((value(Literal((value(LInt 0))(position((start_p(""3 30 46))(end_p(""3 30 47)))))))(position((start_p(""3 30 46))(end_p(""3 30 47)))))))(position((start_p(""3 30 42))(end_p(""3 30 47)))))))((value(Define(SimpleValue(((value(Id z))(position((start_p(""4 49 57))(end_p(""4 49 58)))))()((value(Ref((value(Literal((value(LInt 5))(position((start_p(""4 49 65))(end_p(""4 49 66)))))))(position((start_p(""4 49 65))(end_p(""4 49 66)))))))(position((start_p(""4 49 61))(end_p(""4 49 66)))))))((value(Sequence(((value(While((value(Apply((value(Apply((value(Variable((value(Id `<?`))(position((start_p(""5 68 82))(end_p(""5 68 84)))))()))(position((start_p(""5 68 82))(end_p(""5 68 84)))))((value(Read((value(Variable((value(Id x))(position((start_p(""5 68 80))(end_p(""5 68 81)))))()))(position((start_p(""5 68 80))(end_p(""5 68 81)))))))(position((start_p(""5 68 79))(end_p(""5 68 81)))))))(position((start_p(""5 68 79))(end_p(""5 68 81)))))((value(Literal((value(LInt 0))(position((start_p(""5 68 85))(end_p(""5 68 86)))))))(position((start_p(""5 68 85))(end_p(""5 68 86)))))))(position((start_p(""5 68 79))(end_p(""5 68 86)))))((value(Sequence(((value(Assign((value(Variable((value(Id x))(position((start_p(""6 90 96))(end_p(""6 90 97)))))()))(position((start_p(""6 90 96))(end_p(""6 90 97)))))((value(Apply((value(Apply((value(Variable((value(Id `-`))(position((start_p(""6 90 104))(end_p(""6 90 105)))))()))(position((start_p(""6 90 104))(end_p(""6 90 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5))(position((start_p(""9 134 148))(end_p(""9 134 149)))))))(position((start_p(""9 134 148))(end_p(""9 134 149)))))))(position((start_p(""9 134 141))(end_p(""9 134 150)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""10 158 164))(end_p(""10 158 176)))))()))(position((start_p(""10 158 164))(end_p(""10 158 176)))))((value(Literal((value(LString"This test is OK!\n"))(position((start_p(""10 158 197))(end_p(""10 158 198)))))))(position((start_p(""10 158 177))(end_p(""10 158 199)))))))(position((start_p(""10 158 164))(end_p(""10 158 199)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""12 213 219))(end_p(""12 213 231)))))()))(position((start_p(""12 213 219))(end_p(""12 213 231)))))((value(Literal((value(LString"This is KO!\n"))(position((start_p(""12 213 247))(end_p(""12 213 248)))))))(position((start_p(""12 213 232))(end_p(""12 213 249)))))))(position((start_p(""12 213 219))(end_p(""12 213 249)))))))(position((start_p(""9 134 138))(end_p(""13 250 255))))))))(position((start_p(""5 68 72))(end_p(""13 250 255)))))))(position((start_p(""4 49 53))(end_p(""13 250 255)))))))(position((start_p(""3 30 34))(end_p(""13 250 255)))))))(position((start_p(""2 11 15))(end_p(""13 250 255)))))))))(position((start_p(""1 0 0))(end_p(""13 250 255))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/60-while-03.eval.hopix.human-readable b/flap/tests/02-Interpreter/60-while-03.eval.hopix.human-readable
new file mode 100644
index 0000000..d6d62e1
--- /dev/null
+++ b/flap/tests/02-Interpreter/60-while-03.eval.hopix.human-readable
@@ -0,0 +1,13 @@
+let test =
+    let x = ref 5;
+    let y = ref 0;
+    let z = ref 5;
+    while (!x <? 0) {
+      x := !x - 1;
+      y := !y + 1
+    };
+    if (!x =? 5) then {
+      print_string ("This test is OK!\n")
+    } else {
+      print_string ("This is KO!\n")
+    }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/60-while-03.expected b/flap/tests/02-Interpreter/60-while-03.expected
new file mode 100644
index 0000000..e930c03
--- /dev/null
+++ b/flap/tests/02-Interpreter/60-while-03.expected
@@ -0,0 +1 @@
+This test is OK!
diff --git a/flap/tests/02-Interpreter/61-while-04.eval.hopix b/flap/tests/02-Interpreter/61-while-04.eval.hopix
new file mode 100644
index 0000000..00c746f
--- /dev/null
+++ b/flap/tests/02-Interpreter/61-while-04.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Define(SimpleValue(((value(Id r))(position((start_p(""2 11 19))(end_p(""2 11 20)))))()((value(Ref((value(Literal((value(LInt 1))(position((start_p(""2 11 27))(end_p(""2 11 28)))))))(position((start_p(""2 11 27))(end_p(""2 11 28)))))))(position((start_p(""2 11 23))(end_p(""2 11 28)))))))((value(Define(SimpleValue(((value(Id n))(position((start_p(""3 30 38))(end_p(""3 30 39)))))()((value(Ref((value(Literal((value(LInt 5))(position((start_p(""3 30 46))(end_p(""3 30 47)))))))(position((start_p(""3 30 46))(end_p(""3 30 47)))))))(position((start_p(""3 30 42))(end_p(""3 30 47)))))))((value(Sequence(((value(While((value(Apply((value(Apply((value(Variable((value(Id `>?`))(position((start_p(""4 49 63))(end_p(""4 49 65)))))()))(position((start_p(""4 49 63))(end_p(""4 49 65)))))((value(Read((value(Variable((value(Id n))(position((start_p(""4 49 61))(end_p(""4 49 62)))))()))(position((start_p(""4 49 61))(end_p(""4 49 62)))))))(position((start_p(""4 49 60))(end_p(""4 49 62)))))))(position((start_p(""4 49 60))(end_p(""4 49 62)))))((value(Literal((value(LInt 0))(position((start_p(""4 49 66))(end_p(""4 49 67)))))))(position((start_p(""4 49 66))(end_p(""4 49 67)))))))(position((start_p(""4 49 60))(end_p(""4 49 67)))))((value(Sequence(((value(Assign((value(Variable((value(Id r))(position((start_p(""5 71 77))(end_p(""5 71 78)))))()))(position((start_p(""5 71 77))(end_p(""5 71 78)))))((value(Apply((value(Apply((value(Variable((value(Id `*`))(position((start_p(""5 71 85))(end_p(""5 71 86)))))()))(position((start_p(""5 71 85))(end_p(""5 71 86)))))((value(Read((value(Variable((value(Id r))(position((start_p(""5 71 83))(end_p(""5 71 84)))))()))(position((start_p(""5 71 83))(end_p(""5 71 84)))))))(position((start_p(""5 71 82))(end_p(""5 71 84)))))))(position((start_p(""5 71 82))(end_p(""5 71 84)))))((value(Read((value(Variable((value(Id n))(position((start_p(""5 71 88))(end_p(""5 71 89)))))()))(position((start_p(""5 71 88))(end_p(""5 71 89)))))))(position((start_p(""5 71 87))(end_p(""5 71 89)))))))(position((start_p(""5 71 82))(end_p(""5 71 89)))))))(position((start_p(""5 71 77))(end_p(""5 71 89)))))((value(Assign((value(Variable((value(Id n))(position((start_p(""6 91 97))(end_p(""6 91 98)))))()))(position((start_p(""6 91 97))(end_p(""6 91 98)))))((value(Apply((value(Apply((value(Variable((value(Id `-`))(position((start_p(""6 91 105))(end_p(""6 91 106)))))()))(position((start_p(""6 91 105))(end_p(""6 91 106)))))((value(Read((value(Variable((value(Id n))(position((start_p(""6 91 103))(end_p(""6 91 104)))))()))(position((start_p(""6 91 103))(end_p(""6 91 104)))))))(position((start_p(""6 91 102))(end_p(""6 91 104)))))))(position((start_p(""6 91 102))(end_p(""6 91 104)))))((value(Literal((value(LInt 1))(position((start_p(""6 91 107))(end_p(""6 91 108)))))))(position((start_p(""6 91 107))(end_p(""6 91 108)))))))(position((start_p(""6 91 102))(end_p(""6 91 108)))))))(position((start_p(""6 91 97))(end_p(""6 91 108))))))))(position((start_p(""5 71 77))(end_p(""6 91 108)))))))(position((start_p(""4 49 53))(end_p(""7 109 114)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""8 116 120))(end_p(""8 116 132)))))()))(position((start_p(""8 116 120))(end_p(""8 116 132)))))((value(Literal((value(LString"This test is "))(position((start_p(""8 116 148))(end_p(""8 116 149)))))))(position((start_p(""8 116 133))(end_p(""8 116 150)))))))(position((start_p(""8 116 120))(end_p(""8 116 150)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""9 152 156))(end_p(""9 152 168)))))()))(position((start_p(""9 152 156))(end_p(""9 152 168)))))((value(IfThenElse((value(Apply((value(Apply((value(Variable((value(Id `=?`))(position((start_p(""9 152 177))(end_p(""9 152 179)))))()))(position((start_p(""9 152 177))(end_p(""9 152 179)))))((value(Read((value(Variable((value(Id r))(position((start_p(""9 152 175))(end_p(""9 152 176)))))()))(position((start_p(""9 152 175))(end_p(""9 152 176)))))))(position((start_p(""9 152 174))(end_p(""9 152 176)))))))(position((start_p(""9 152 174))(end_p(""9 152 176)))))((value(Literal((value(LInt 120))(position((start_p(""9 152 180))(end_p(""9 152 183)))))))(position((start_p(""9 152 180))(end_p(""9 152 183)))))))(position((start_p(""9 152 173))(end_p(""9 152 184)))))((value(Literal((value(LString"OK!\n"))(position((start_p(""9 152 198))(end_p(""9 152 199)))))))(position((start_p(""9 152 198))(end_p(""9 152 199)))))((value(Literal((value(LString"KO!\n"))(position((start_p(""9 152 215))(end_p(""9 152 216)))))))(position((start_p(""9 152 215))(end_p(""9 152 216)))))))(position((start_p(""9 152 169))(end_p(""9 152 219)))))))(position((start_p(""9 152 156))(end_p(""9 152 219))))))))(position((start_p(""8 116 120))(end_p(""9 152 219))))))))(position((start_p(""4 49 53))(end_p(""9 152 219)))))))(position((start_p(""3 30 34))(end_p(""9 152 219)))))))(position((start_p(""2 11 15))(end_p(""9 152 219)))))))))(position((start_p(""1 0 0))(end_p(""9 152 219))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/61-while-04.eval.hopix.human-readable b/flap/tests/02-Interpreter/61-while-04.eval.hopix.human-readable
new file mode 100644
index 0000000..a6046a1
--- /dev/null
+++ b/flap/tests/02-Interpreter/61-while-04.eval.hopix.human-readable
@@ -0,0 +1,9 @@
+let test =
+    let r = ref 1;
+    let n = ref 5;
+    while (!n >? 0) {
+      r := !r * !n;
+      n := !n - 1
+    };
+    print_string ("This test is ");
+    print_string (if (!r =? 120) then { "OK!\n" } else { "KO!\n" })
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/61-while-04.expected b/flap/tests/02-Interpreter/61-while-04.expected
new file mode 100644
index 0000000..e930c03
--- /dev/null
+++ b/flap/tests/02-Interpreter/61-while-04.expected
@@ -0,0 +1 @@
+This test is OK!
diff --git a/flap/tests/02-Interpreter/62-for-01.eval.hopix b/flap/tests/02-Interpreter/62-for-01.eval.hopix
new file mode 100644
index 0000000..68ad807
--- /dev/null
+++ b/flap/tests/02-Interpreter/62-for-01.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Define(SimpleValue(((value(Id r))(position((start_p(""2 11 19))(end_p(""2 11 20)))))()((value(Ref((value(Literal((value(LInt 1))(position((start_p(""2 11 27))(end_p(""2 11 28)))))))(position((start_p(""2 11 27))(end_p(""2 11 28)))))))(position((start_p(""2 11 23))(end_p(""2 11 28)))))))((value(Sequence(((value(For((value(Id i))(position((start_p(""3 30 38))(end_p(""3 30 39)))))((value(Literal((value(LInt 1))(position((start_p(""3 30 46))(end_p(""3 30 47)))))))(position((start_p(""3 30 46))(end_p(""3 30 47)))))((value(Literal((value(LInt 5))(position((start_p(""3 30 53))(end_p(""3 30 54)))))))(position((start_p(""3 30 53))(end_p(""3 30 54)))))((value(Assign((value(Variable((value(Id r))(position((start_p(""4 58 64))(end_p(""4 58 65)))))()))(position((start_p(""4 58 64))(end_p(""4 58 65)))))((value(Apply((value(Apply((value(Variable((value(Id `*`))(position((start_p(""4 58 72))(end_p(""4 58 73)))))()))(position((start_p(""4 58 72))(end_p(""4 58 73)))))((value(Read((value(Variable((value(Id r))(position((start_p(""4 58 70))(end_p(""4 58 71)))))()))(position((start_p(""4 58 70))(end_p(""4 58 71)))))))(position((start_p(""4 58 69))(end_p(""4 58 71)))))))(position((start_p(""4 58 69))(end_p(""4 58 71)))))((value(Variable((value(Id i))(position((start_p(""4 58 74))(end_p(""4 58 75)))))()))(position((start_p(""4 58 74))(end_p(""4 58 75)))))))(position((start_p(""4 58 69))(end_p(""4 58 75)))))))(position((start_p(""4 58 64))(end_p(""4 58 75)))))))(position((start_p(""3 30 34))(end_p(""5 76 81)))))((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""6 83 87))(end_p(""6 83 99)))))()))(position((start_p(""6 83 87))(end_p(""6 83 99)))))((value(Literal((value(LString"This test is "))(position((start_p(""6 83 115))(end_p(""6 83 116)))))))(position((start_p(""6 83 100))(end_p(""6 83 117)))))))(position((start_p(""6 83 87))(end_p(""6 83 117)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""7 119 123))(end_p(""7 119 135)))))()))(position((start_p(""7 119 123))(end_p(""7 119 135)))))((value(IfThenElse((value(Apply((value(Apply((value(Variable((value(Id `=?`))(position((start_p(""7 119 144))(end_p(""7 119 146)))))()))(position((start_p(""7 119 144))(end_p(""7 119 146)))))((value(Read((value(Variable((value(Id r))(position((start_p(""7 119 142))(end_p(""7 119 143)))))()))(position((start_p(""7 119 142))(end_p(""7 119 143)))))))(position((start_p(""7 119 141))(end_p(""7 119 143)))))))(position((start_p(""7 119 141))(end_p(""7 119 143)))))((value(Literal((value(LInt 120))(position((start_p(""7 119 147))(end_p(""7 119 150)))))))(position((start_p(""7 119 147))(end_p(""7 119 150)))))))(position((start_p(""7 119 140))(end_p(""7 119 151)))))((value(Literal((value(LString"OK!\n"))(position((start_p(""7 119 165))(end_p(""7 119 166)))))))(position((start_p(""7 119 165))(end_p(""7 119 166)))))((value(Literal((value(LString"KO!\n"))(position((start_p(""7 119 182))(end_p(""7 119 183)))))))(position((start_p(""7 119 182))(end_p(""7 119 183)))))))(position((start_p(""7 119 136))(end_p(""7 119 186)))))))(position((start_p(""7 119 123))(end_p(""7 119 186))))))))(position((start_p(""6 83 87))(end_p(""7 119 186))))))))(position((start_p(""3 30 34))(end_p(""7 119 186)))))))(position((start_p(""2 11 15))(end_p(""7 119 186)))))))))(position((start_p(""1 0 0))(end_p(""7 119 186))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/62-for-01.eval.hopix.human-readable b/flap/tests/02-Interpreter/62-for-01.eval.hopix.human-readable
new file mode 100644
index 0000000..9e77616
--- /dev/null
+++ b/flap/tests/02-Interpreter/62-for-01.eval.hopix.human-readable
@@ -0,0 +1,7 @@
+let test =
+    let r = ref 1;
+    for i from (1) to (5) {
+      r := !r * i
+    };
+    print_string ("This test is ");
+    print_string (if (!r =? 120) then { "OK!\n" } else { "KO!\n" })
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/62-for-01.expected b/flap/tests/02-Interpreter/62-for-01.expected
new file mode 100644
index 0000000..e930c03
--- /dev/null
+++ b/flap/tests/02-Interpreter/62-for-01.expected
@@ -0,0 +1 @@
+This test is OK!
diff --git a/flap/tests/02-Interpreter/63-for-02.eval.hopix b/flap/tests/02-Interpreter/63-for-02.eval.hopix
new file mode 100644
index 0000000..12175e4
--- /dev/null
+++ b/flap/tests/02-Interpreter/63-for-02.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Define(SimpleValue(((value(Id r))(position((start_p(""2 11 19))(end_p(""2 11 20)))))()((value(Ref((value(Literal((value(LInt 1))(position((start_p(""2 11 27))(end_p(""2 11 28)))))))(position((start_p(""2 11 27))(end_p(""2 11 28)))))))(position((start_p(""2 11 23))(end_p(""2 11 28)))))))((value(Sequence(((value(For((value(Id i))(position((start_p(""3 30 38))(end_p(""3 30 39)))))((value(Literal((value(LInt 1))(position((start_p(""3 30 46))(end_p(""3 30 47)))))))(position((start_p(""3 30 46))(end_p(""3 30 47)))))((value(Literal((value(LInt 5))(position((start_p(""3 30 53))(end_p(""3 30 54)))))))(position((start_p(""3 30 53))(end_p(""3 30 54)))))((value(Sequence(((value(For((value(Id j))(position((start_p(""4 58 68))(end_p(""4 58 69)))))((value(Literal((value(LInt 1))(position((start_p(""4 58 76))(end_p(""4 58 77)))))))(position((start_p(""4 58 76))(end_p(""4 58 77)))))((value(Literal((value(LInt 5))(position((start_p(""4 58 83))(end_p(""4 58 84)))))))(position((start_p(""4 58 83))(end_p(""4 58 84)))))((value(Assign((value(Variable((value(Id r))(position((start_p(""5 88 96))(end_p(""5 88 97)))))()))(position((start_p(""5 88 96))(end_p(""5 88 97)))))((value(Apply((value(Apply((value(Variable((value(Id `*`))(position((start_p(""5 88 104))(end_p(""5 88 105)))))()))(position((start_p(""5 88 104))(end_p(""5 88 105)))))((value(Read((value(Variable((value(Id r))(position((start_p(""5 88 102))(end_p(""5 88 103)))))()))(position((start_p(""5 88 102))(end_p(""5 88 103)))))))(position((start_p(""5 88 101))(end_p(""5 88 103)))))))(position((start_p(""5 88 101))(end_p(""5 88 103)))))((value(Variable((value(Id j))(position((start_p(""5 88 106))(end_p(""5 88 107)))))()))(position((start_p(""5 88 106))(end_p(""5 88 107)))))))(position((start_p(""5 88 101))(end_p(""5 88 107)))))))(position((start_p(""5 88 96))(end_p(""5 88 107)))))))(position((start_p(""4 58 64))(end_p(""6 108 115)))))((value(Sequence(((value(Assign((value(Variable((value(Id r))(position((start_p(""7 117 123))(end_p(""7 117 124)))))()))(position((start_p(""7 117 123))(end_p(""7 117 124)))))((value(Apply((value(Apply((value(Variable((value(Id `*`))(position((start_p(""7 117 131))(end_p(""7 117 132)))))()))(position((start_p(""7 117 131))(end_p(""7 117 132)))))((value(Read((value(Variable((value(Id r))(position((start_p(""7 117 129))(end_p(""7 117 130)))))()))(position((start_p(""7 117 129))(end_p(""7 117 130)))))))(position((start_p(""7 117 128))(end_p(""7 117 130)))))))(position((start_p(""7 117 128))(end_p(""7 117 130)))))((value(Variable((value(Id i))(position((start_p(""7 117 133))(end_p(""7 117 134)))))()))(position((start_p(""7 117 133))(end_p(""7 117 134)))))))(position((start_p(""7 117 128))(end_p(""7 117 134)))))))(position((start_p(""7 117 123))(end_p(""7 117 134)))))((value(For((value(Id j))(position((start_p(""8 136 146))(end_p(""8 136 147)))))((value(Literal((value(LInt 1))(position((start_p(""8 136 154))(end_p(""8 136 155)))))))(position((start_p(""8 136 154))(end_p(""8 136 155)))))((value(Literal((value(LInt 5))(position((start_p(""8 136 161))(end_p(""8 136 162)))))))(position((start_p(""8 136 161))(end_p(""8 136 162)))))((value(Assign((value(Variable((value(Id r))(position((start_p(""9 166 174))(end_p(""9 166 175)))))()))(position((start_p(""9 166 174))(end_p(""9 166 175)))))((value(Apply((value(Apply((value(Variable((value(Id `/`))(position((start_p(""9 166 182))(end_p(""9 166 183)))))()))(position((start_p(""9 166 182))(end_p(""9 166 183)))))((value(Read((value(Variable((value(Id r))(position((start_p(""9 166 180))(end_p(""9 166 181)))))()))(position((start_p(""9 166 180))(end_p(""9 166 181)))))))(position((start_p(""9 166 179))(end_p(""9 166 181)))))))(position((start_p(""9 166 179))(end_p(""9 166 181)))))((value(Variable((value(Id j))(position((start_p(""9 166 184))(end_p(""9 166 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253)))))((value(IfThenElse((value(Apply((value(Apply((value(Variable((value(Id `=?`))(position((start_p(""13 237 262))(end_p(""13 237 264)))))()))(position((start_p(""13 237 262))(end_p(""13 237 264)))))((value(Read((value(Variable((value(Id r))(position((start_p(""13 237 260))(end_p(""13 237 261)))))()))(position((start_p(""13 237 260))(end_p(""13 237 261)))))))(position((start_p(""13 237 259))(end_p(""13 237 261)))))))(position((start_p(""13 237 259))(end_p(""13 237 261)))))((value(Literal((value(LInt 120))(position((start_p(""13 237 265))(end_p(""13 237 268)))))))(position((start_p(""13 237 265))(end_p(""13 237 268)))))))(position((start_p(""13 237 258))(end_p(""13 237 269)))))((value(Literal((value(LString"OK!\n"))(position((start_p(""13 237 283))(end_p(""13 237 284)))))))(position((start_p(""13 237 283))(end_p(""13 237 284)))))((value(Literal((value(LString"KO!\n"))(position((start_p(""13 237 300))(end_p(""13 237 301)))))))(position((start_p(""13 237 300))(end_p(""13 237 301)))))))(position((start_p(""13 237 254))(end_p(""13 237 304)))))))(position((start_p(""13 237 241))(end_p(""13 237 304))))))))(position((start_p(""12 201 205))(end_p(""13 237 304))))))))(position((start_p(""3 30 34))(end_p(""13 237 304)))))))(position((start_p(""2 11 15))(end_p(""13 237 304)))))))))(position((start_p(""1 0 0))(end_p(""13 237 304))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/63-for-02.eval.hopix.human-readable b/flap/tests/02-Interpreter/63-for-02.eval.hopix.human-readable
new file mode 100644
index 0000000..607237d
--- /dev/null
+++ b/flap/tests/02-Interpreter/63-for-02.eval.hopix.human-readable
@@ -0,0 +1,13 @@
+let test =
+    let r = ref 1;
+    for i from (1) to (5) {
+      for j from (1) to (5) {
+        r := !r * j
+      };
+      r := !r * i;
+      for j from (1) to (5) {
+        r := !r / j
+      }
+    };
+    print_string ("This test is ");
+    print_string (if (!r =? 120) then { "OK!\n" } else { "KO!\n" })
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/63-for-02.expected b/flap/tests/02-Interpreter/63-for-02.expected
new file mode 100644
index 0000000..e930c03
--- /dev/null
+++ b/flap/tests/02-Interpreter/63-for-02.expected
@@ -0,0 +1 @@
+This test is OK!
diff --git a/flap/tests/02-Interpreter/64-for-03.eval.hopix b/flap/tests/02-Interpreter/64-for-03.eval.hopix
new file mode 100644
index 0000000..3529f63
--- /dev/null
+++ b/flap/tests/02-Interpreter/64-for-03.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Define(SimpleValue(((value(Id r))(position((start_p(""2 11 19))(end_p(""2 11 20)))))()((value(Ref((value(Literal((value(LInt 1))(position((start_p(""2 11 27))(end_p(""2 11 28)))))))(position((start_p(""2 11 27))(end_p(""2 11 28)))))))(position((start_p(""2 11 23))(end_p(""2 11 28)))))))((value(Sequence(((value(For((value(Id i))(position((start_p(""3 30 38))(end_p(""3 30 39)))))((value(Literal((value(LInt 1))(position((start_p(""3 30 46))(end_p(""3 30 47)))))))(position((start_p(""3 30 46))(end_p(""3 30 47)))))((value(Literal((value(LInt 5))(position((start_p(""3 30 53))(end_p(""3 30 54)))))))(position((start_p(""3 30 53))(end_p(""3 30 54)))))((value(Sequence(((value(For((value(Id i))(position((start_p(""4 58 68))(end_p(""4 58 69)))))((value(Literal((value(LInt 1))(position((start_p(""4 58 76))(end_p(""4 58 77)))))))(position((start_p(""4 58 76))(end_p(""4 58 77)))))((value(Literal((value(LInt 5))(position((start_p(""4 58 83))(end_p(""4 58 84)))))))(position((start_p(""4 58 83))(end_p(""4 58 84)))))((value(Assign((value(Variable((value(Id r))(position((start_p(""5 88 96))(end_p(""5 88 97)))))()))(position((start_p(""5 88 96))(end_p(""5 88 97)))))((value(Apply((value(Apply((value(Variable((value(Id `*`))(position((start_p(""5 88 104))(end_p(""5 88 105)))))()))(position((start_p(""5 88 104))(end_p(""5 88 105)))))((value(Read((value(Variable((value(Id r))(position((start_p(""5 88 102))(end_p(""5 88 103)))))()))(position((start_p(""5 88 102))(end_p(""5 88 103)))))))(position((start_p(""5 88 101))(end_p(""5 88 103)))))))(position((start_p(""5 88 101))(end_p(""5 88 103)))))((value(Variable((value(Id i))(position((start_p(""5 88 106))(end_p(""5 88 107)))))()))(position((start_p(""5 88 106))(end_p(""5 88 107)))))))(position((start_p(""5 88 101))(end_p(""5 88 107)))))))(position((start_p(""5 88 96))(end_p(""5 88 107)))))))(position((start_p(""4 58 64))(end_p(""6 108 115)))))((value(Sequence(((value(Assign((value(Variable((value(Id r))(position((start_p(""7 117 123))(end_p(""7 117 124)))))()))(position((start_p(""7 117 123))(end_p(""7 117 124)))))((value(Apply((value(Apply((value(Variable((value(Id `*`))(position((start_p(""7 117 131))(end_p(""7 117 132)))))()))(position((start_p(""7 117 131))(end_p(""7 117 132)))))((value(Read((value(Variable((value(Id r))(position((start_p(""7 117 129))(end_p(""7 117 130)))))()))(position((start_p(""7 117 129))(end_p(""7 117 130)))))))(position((start_p(""7 117 128))(end_p(""7 117 130)))))))(position((start_p(""7 117 128))(end_p(""7 117 130)))))((value(Variable((value(Id i))(position((start_p(""7 117 133))(end_p(""7 117 134)))))()))(position((start_p(""7 117 133))(end_p(""7 117 134)))))))(position((start_p(""7 117 128))(end_p(""7 117 134)))))))(position((start_p(""7 117 123))(end_p(""7 117 134)))))((value(For((value(Id i))(position((start_p(""8 136 146))(end_p(""8 136 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\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/64-for-03.eval.hopix.human-readable b/flap/tests/02-Interpreter/64-for-03.eval.hopix.human-readable
new file mode 100644
index 0000000..46ca3d2
--- /dev/null
+++ b/flap/tests/02-Interpreter/64-for-03.eval.hopix.human-readable
@@ -0,0 +1,13 @@
+let test =
+    let r = ref 1;
+    for i from (1) to (5) {
+      for i from (1) to (5) {
+        r := !r * i
+      };
+      r := !r * i;
+      for i from (1) to (5) {
+        r := !r / i
+      }
+    };
+    print_string ("This test is ");
+    print_string (if (!r =? 120) then { "OK!\n" } else { "KO!\n" })
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/64-for-03.expected b/flap/tests/02-Interpreter/64-for-03.expected
new file mode 100644
index 0000000..e930c03
--- /dev/null
+++ b/flap/tests/02-Interpreter/64-for-03.expected
@@ -0,0 +1 @@
+This test is OK!
diff --git a/flap/tests/02-Interpreter/65-for-04.eval.hopix b/flap/tests/02-Interpreter/65-for-04.eval.hopix
new file mode 100644
index 0000000..610330e
--- /dev/null
+++ b/flap/tests/02-Interpreter/65-for-04.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()((value(Define(SimpleValue(((value(Id r))(position((start_p(""2 11 19))(end_p(""2 11 20)))))()((value(Ref((value(Literal((value(LInt 1))(position((start_p(""2 11 27))(end_p(""2 11 28)))))))(position((start_p(""2 11 27))(end_p(""2 11 28)))))))(position((start_p(""2 11 23))(end_p(""2 11 28)))))))((value(Sequence(((value(For((value(Id i))(position((start_p(""3 30 38))(end_p(""3 30 39)))))((value(Literal((value(LInt 1))(position((start_p(""3 30 46))(end_p(""3 30 47)))))))(position((start_p(""3 30 46))(end_p(""3 30 47)))))((value(Literal((value(LInt 10))(position((start_p(""3 30 53))(end_p(""3 30 55)))))))(position((start_p(""3 30 53))(end_p(""3 30 55)))))((value(Sequence(((value(For((value(Id i))(position((start_p(""4 59 69))(end_p(""4 59 70)))))((value(Literal((value(LInt 1))(position((start_p(""4 59 77))(end_p(""4 59 78)))))))(position((start_p(""4 59 77))(end_p(""4 59 78)))))((value(Literal((value(LInt 5))(position((start_p(""4 59 84))(end_p(""4 59 85)))))))(position((start_p(""4 59 84))(end_p(""4 59 85)))))((value(Assign((value(Variable((value(Id r))(position((start_p(""5 89 97))(end_p(""5 89 98)))))()))(position((start_p(""5 89 97))(end_p(""5 89 98)))))((value(Apply((value(Apply((value(Variable((value(Id `*`))(position((start_p(""5 89 105))(end_p(""5 89 106)))))()))(position((start_p(""5 89 105))(end_p(""5 89 106)))))((value(Read((value(Variable((value(Id r))(position((start_p(""5 89 103))(end_p(""5 89 104)))))()))(position((start_p(""5 89 103))(end_p(""5 89 104)))))))(position((start_p(""5 89 102))(end_p(""5 89 104)))))))(position((start_p(""5 89 102))(end_p(""5 89 104)))))((value(Variable((value(Id i))(position((start_p(""5 89 107))(end_p(""5 89 108)))))()))(position((start_p(""5 89 107))(end_p(""5 89 108)))))))(position((start_p(""5 89 102))(end_p(""5 89 108)))))))(position((start_p(""5 89 97))(end_p(""5 89 108)))))))(position((start_p(""4 59 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314))))))))(position((start_p(""3 30 34))(end_p(""13 249 314)))))))(position((start_p(""2 11 15))(end_p(""13 249 314)))))))))(position((start_p(""1 0 0))(end_p(""13 249 314))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/65-for-04.eval.hopix.human-readable b/flap/tests/02-Interpreter/65-for-04.eval.hopix.human-readable
new file mode 100644
index 0000000..4beac80
--- /dev/null
+++ b/flap/tests/02-Interpreter/65-for-04.eval.hopix.human-readable
@@ -0,0 +1,13 @@
+let test =
+    let r = ref 1;
+    for i from (1) to (10) {
+      for i from (1) to (5) {
+        r := !r * i
+      };
+      r := !r * (1 + i / 10);
+      for i from (1) to (5) {
+        r := !r / i
+      }
+    };
+    print_string ("This test is ");
+    print_string (if (!r =? 2) then { "OK!\n" } else { "KO!\n" })
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/65-for-04.expected b/flap/tests/02-Interpreter/65-for-04.expected
new file mode 100644
index 0000000..e930c03
--- /dev/null
+++ b/flap/tests/02-Interpreter/65-for-04.expected
@@ -0,0 +1 @@
+This test is OK!
diff --git a/flap/tests/02-Interpreter/66-concat.eval.hopix b/flap/tests/02-Interpreter/66-concat.eval.hopix
new file mode 100644
index 0000000..a924fe5
--- /dev/null
+++ b/flap/tests/02-Interpreter/66-concat.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(RecFunctions((((value(Id concat))(position((start_p(""1 0 4))(end_p(""1 0 10)))))()(FunctionDefinition((value(PTuple(((value(PVariable((value(Id l1))(position((start_p(""1 0 12))(end_p(""1 0 14)))))))(position((start_p(""1 0 12))(end_p(""1 0 14)))))((value(PVariable((value(Id l2))(position((start_p(""1 0 16))(end_p(""1 0 18)))))))(position((start_p(""1 0 16))(end_p(""1 0 18))))))))(position((start_p(""1 0 11))(end_p(""1 0 19)))))((value(Case((value(Variable((value(Id l1))(position((start_p(""2 22 31))(end_p(""2 22 33)))))()))(position((start_p(""2 22 31))(end_p(""2 22 33)))))(((value(Branch((value(PTaggedValue((value(KId N))(position((start_p(""3 37 41))(end_p(""3 37 42)))))()()))(position((start_p(""3 37 41))(end_p(""3 37 42)))))((value(Variable((value(Id l2))(position((start_p(""3 37 46))(end_p(""3 37 48)))))()))(position((start_p(""3 37 46))(end_p(""3 37 48)))))))(position((start_p(""3 37 41))(end_p(""3 37 48)))))((value(Branch((value(PTaggedValue((value(KId 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diff --git a/flap/tests/02-Interpreter/66-concat.eval.hopix.human-readable b/flap/tests/02-Interpreter/66-concat.eval.hopix.human-readable
new file mode 100644
index 0000000..1939a5e
--- /dev/null
+++ b/flap/tests/02-Interpreter/66-concat.eval.hopix.human-readable
@@ -0,0 +1,25 @@
+fun concat (l1, l2) =
+  match (l1) {
+  | N -> l2
+  | C (x, xs) -> C (x, concat (xs, l2))
+  }
+
+let l = C (1, C (2, N))
+let l = concat (l, l)
+let l = concat (l, l)
+let l = concat (l, l)
+let l = concat (l, l)
+let l = concat (l, l)
+let l = concat (l, l)
+
+fun len (l) =
+  match (l) {
+  | N -> 0
+  | C (x, xs) -> 1 + len (xs)
+  }
+
+let test =
+  print_int (len (l));
+  print_string ("\n")
+
+
diff --git a/flap/tests/02-Interpreter/66-concat.expected b/flap/tests/02-Interpreter/66-concat.expected
new file mode 100644
index 0000000..a949a93
--- /dev/null
+++ b/flap/tests/02-Interpreter/66-concat.expected
@@ -0,0 +1 @@
+128
diff --git a/flap/tests/02-Interpreter/67-sorted.eval.hopix b/flap/tests/02-Interpreter/67-sorted.eval.hopix
new file mode 100644
index 0000000..8e29b3b
--- /dev/null
+++ b/flap/tests/02-Interpreter/67-sorted.eval.hopix
@@ -0,0 +1 @@
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diff --git a/flap/tests/02-Interpreter/67-sorted.eval.hopix.human-readable b/flap/tests/02-Interpreter/67-sorted.eval.hopix.human-readable
new file mode 100644
index 0000000..06bb230
--- /dev/null
+++ b/flap/tests/02-Interpreter/67-sorted.eval.hopix.human-readable
@@ -0,0 +1,43 @@
+fun concat (l1, l2) =
+  match (l1) {
+  | N -> l2
+  | C (x, xs) -> C (x, concat (xs, l2))
+  }
+
+let l = C (1, C (2, N))
+let l = concat (l, l)
+let l = concat (l, l)
+let l = concat (l, l)
+let l = concat (l, l)
+let l = concat (l, l)
+let l = concat (l, l)
+
+fun len (l) =
+  match (l) {
+  | N -> 0
+  | C (x, xs) -> 1 + len (xs)
+  }
+
+fun sorted (l) =
+  match (l) {
+  | N | C (_, N) -> true
+  | C (x, C (y, _) & l) -> x <=? y && sorted (l)
+  }
+
+let l2 = C (1, C (2, C (6, C (7, N))))
+
+let l3 = C (-1, C (2, C (6, C (70, N))))
+
+let l4 = C (-1, C (20, C (6, C (70, N))))
+
+fun not (b) = if (b) then { false } else { true }
+
+let r =
+  not (sorted (l)) &&
+  sorted (l2) &&
+  sorted (l3) &&
+  not (sorted (l4))
+
+let test =
+  print_string ("This test is ");
+  print_string (if (r) then { "OK!\n" } else { "KO!\n" })
diff --git a/flap/tests/02-Interpreter/67-sorted.expected b/flap/tests/02-Interpreter/67-sorted.expected
new file mode 100644
index 0000000..e930c03
--- /dev/null
+++ b/flap/tests/02-Interpreter/67-sorted.expected
@@ -0,0 +1 @@
+This test is OK!
diff --git a/flap/tests/02-Interpreter/68-sort.eval.hopix b/flap/tests/02-Interpreter/68-sort.eval.hopix
new file mode 100644
index 0000000..4d86ab6
--- /dev/null
+++ b/flap/tests/02-Interpreter/68-sort.eval.hopix
@@ -0,0 +1 @@
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diff --git a/flap/tests/02-Interpreter/68-sort.eval.hopix.human-readable b/flap/tests/02-Interpreter/68-sort.eval.hopix.human-readable
new file mode 100644
index 0000000..3dadba0
--- /dev/null
+++ b/flap/tests/02-Interpreter/68-sort.eval.hopix.human-readable
@@ -0,0 +1,74 @@
+fun concat (l1, l2) =
+  match (l1) {
+  | N -> l2
+  | C (x, xs) -> C (x, concat (xs, l2))
+  }
+
+let l = C (1, C (2, N))
+let l = concat (l, l)
+let l = concat (l, l)
+let l = concat (l, l)
+let l = concat (l, l)
+let l = concat (l, l)
+let l = concat (l, l)
+
+fun len (l) =
+  match (l) {
+  | N -> 0
+  | C (x, xs) -> 1 + len (xs)
+  }
+
+fun sorted (l) =
+  match (l) {
+  | N | C (_, N) -> true
+  | C (x, C (y, _) & l) -> x <=? y && sorted (l)
+  }
+
+let l2 = C (1, C (2, C (6, C (7, N))))
+
+let l3 = C (-1, C (2, C (6, C (70, N))))
+
+let l4 = C (-1, C (20, C (6, C (70, N))))
+
+fun not (b) = if (b) then { false } else { true }
+
+fun sort (l) =
+    match (l) {
+    | N -> N
+    | C (x, xs) -> match (pivot (x, xs)) {
+      | (l1, l2) ->
+        let l1 = sort (l1);
+        let l2 = sort (l2);
+        concat (l1, C (x, l2))
+      }
+    }
+and pivot (x, l) =
+    match (l) {
+    | N ->
+      (N, N)
+    | C (y, ys) ->
+      match (pivot (x, ys)) {
+      | (l1, l2) ->
+         if (y >? x) then { (l1,  C (y, l2)) } else { (C (y, l1), l2) }
+      }
+    }
+
+fun print (l) =
+    match (l) {
+    | N -> print_string ("\n")
+    | C (x, xs) -> print_int (x); print_string (" "); print (xs)
+    }
+
+fun show (l) =
+    print (l);
+    l
+
+let r =
+  sorted (sort (l)) &&
+  sorted (sort (l2)) &&
+  sorted (sort (l3)) &&
+  sorted (sort (l4))
+
+let test =
+  print_string ("This test is ");
+  print_string (if (r) then { "OK!\n" } else { "KO!\n" })
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/68-sort.expected b/flap/tests/02-Interpreter/68-sort.expected
new file mode 100644
index 0000000..e930c03
--- /dev/null
+++ b/flap/tests/02-Interpreter/68-sort.expected
@@ -0,0 +1 @@
+This test is OK!
diff --git a/flap/tests/02-Interpreter/69-sort-big.eval.hopix b/flap/tests/02-Interpreter/69-sort-big.eval.hopix
new file mode 100644
index 0000000..84d44a2
--- /dev/null
+++ b/flap/tests/02-Interpreter/69-sort-big.eval.hopix
@@ -0,0 +1 @@
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1343)))))))(position((start_p(""70 1309 1318))(end_p(""70 1309 1344)))))))(position((start_p(""70 1309 1311))(end_p(""70 1309 1344)))))))))(position((start_p(""69 1301 1301))(end_p(""70 1309 1344)))))((value(DefineValue(SimpleValue(((value(Id test))(position((start_p(""72 1346 1350))(end_p(""72 1346 1354)))))()((value(Sequence(((value(Apply((value(Variable((value(Id print_string))(position((start_p(""73 1357 1359))(end_p(""73 1357 1371)))))()))(position((start_p(""73 1357 1359))(end_p(""73 1357 1371)))))((value(Literal((value(LString"This test is "))(position((start_p(""73 1357 1387))(end_p(""73 1357 1388)))))))(position((start_p(""73 1357 1372))(end_p(""73 1357 1389)))))))(position((start_p(""73 1357 1359))(end_p(""73 1357 1389)))))((value(Apply((value(Variable((value(Id print_string))(position((start_p(""74 1391 1393))(end_p(""74 1391 1405)))))()))(position((start_p(""74 1391 1393))(end_p(""74 1391 1405)))))((value(IfThenElse((value(Variable((value(Id r))(position((start_p(""74 1391 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\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/69-sort-big.eval.hopix.human-readable b/flap/tests/02-Interpreter/69-sort-big.eval.hopix.human-readable
new file mode 100644
index 0000000..b41a271
--- /dev/null
+++ b/flap/tests/02-Interpreter/69-sort-big.eval.hopix.human-readable
@@ -0,0 +1,74 @@
+fun concat (l1, l2) =
+  match (l1) {
+  | N -> l2
+  | C (x, xs) -> C (x, concat (xs, l2))
+  }
+
+let l = C (1, C (2, N))
+let l = concat (l, l)
+let l = concat (l, l)
+let l = concat (l, l)
+let l = concat (l, l)
+let l = concat (l, l)
+let l = concat (l, l)
+
+fun len (l) =
+  match (l) {
+  | N -> 0
+  | C (x, xs) -> 1 + len (xs)
+  }
+
+fun sorted (l) =
+  match (l) {
+  | N | C (_, N) -> true
+  | C (x, C (y, _) & l) -> x <=? y && sorted (l)
+  }
+
+let l2 = C (1, C (2, C (6, C (7, N))))
+
+let l3 = C (-1, C (2, C (6, C (70, N))))
+
+let l4 = C (-1, C (20, C (6, C (70, N))))
+
+fun not (b) = if (b) then { false } else { true }
+
+fun sort (l) =
+    match (l) {
+    | N -> N
+    | C (x, xs) -> match (pivot (x, xs)) {
+      | (l1, l2) ->
+        let l1 = sort (l1);
+        let l2 = sort (l2);
+        concat (l1, C (x, l2))
+      }
+    }
+and pivot (x, l) =
+    match (l) {
+    | N ->
+      (N, N)
+    | C (y, ys) ->
+      match (pivot (x, ys)) {
+      | (l1, l2) ->
+         if (y >? x) then { (l1,  C (y, l2)) } else { (C (y, l1), l2) }
+      }
+    }
+
+fun print (l) =
+    match (l) {
+    | N -> print_string ("\n")
+    | C (x, xs) -> print_int (x); print_string (" "); print (xs)
+    }
+
+fun show (l) =
+    print (l);
+    l
+
+fun generate (accu, n) =
+    if (n =? 0) then { accu } else { generate (C (n, accu), n - 1) }
+
+let r =
+  sorted (sort (generate (N, 500)))
+
+let test =
+  print_string ("This test is ");
+  print_string (if (r) then { "OK!\n" } else { "KO!\n" })
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/69-sort-big.expected b/flap/tests/02-Interpreter/69-sort-big.expected
new file mode 100644
index 0000000..e930c03
--- /dev/null
+++ b/flap/tests/02-Interpreter/69-sort-big.expected
@@ -0,0 +1 @@
+This test is OK!
diff --git a/flap/tests/02-Interpreter/70-tree.eval.hopix b/flap/tests/02-Interpreter/70-tree.eval.hopix
new file mode 100644
index 0000000..ccb443b
--- /dev/null
+++ b/flap/tests/02-Interpreter/70-tree.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(RecFunctions((((value(Id make))(position((start_p(""1 0 4))(end_p(""1 0 8)))))()(FunctionDefinition((value(PVariable((value(Id n))(position((start_p(""1 0 10))(end_p(""1 0 11)))))))(position((start_p(""1 0 9))(end_p(""1 0 12)))))((value(IfThenElse((value(Apply((value(Apply((value(Variable((value(Id `=?`))(position((start_p(""2 15 25))(end_p(""2 15 27)))))()))(position((start_p(""2 15 25))(end_p(""2 15 27)))))((value(Variable((value(Id n))(position((start_p(""2 15 23))(end_p(""2 15 24)))))()))(position((start_p(""2 15 23))(end_p(""2 15 24)))))))(position((start_p(""2 15 23))(end_p(""2 15 24)))))((value(Literal((value(LInt 0))(position((start_p(""2 15 28))(end_p(""2 15 29)))))))(position((start_p(""2 15 28))(end_p(""2 15 29)))))))(position((start_p(""2 15 22))(end_p(""2 15 30)))))((value(Tagged((value(KId Leaf))(position((start_p(""2 15 38))(end_p(""2 15 42)))))()()))(position((start_p(""2 15 38))(end_p(""2 15 42)))))((value(Tagged((value(KId 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205))(end_p(""14 314 319))))))
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/70-tree.eval.hopix.human-readable b/flap/tests/02-Interpreter/70-tree.eval.hopix.human-readable
new file mode 100644
index 0000000..0276c64
--- /dev/null
+++ b/flap/tests/02-Interpreter/70-tree.eval.hopix.human-readable
@@ -0,0 +1,14 @@
+fun make (n) =
+    if (n =? 0) then { Leaf } else { Node (make (n - 1), make (n - 1)) }
+
+fun count (accu, t) =
+    match (t) {
+    | Leaf -> 1 + accu
+    | Node (l, r) -> count (count (accu, l), r)
+    }
+
+let test =
+    for i from (0) to (14) {
+        print_int (count (0, make (i)));
+        print_string ("\n")
+    }
\ No newline at end of file
diff --git a/flap/tests/02-Interpreter/70-tree.expected b/flap/tests/02-Interpreter/70-tree.expected
new file mode 100644
index 0000000..d1382b3
--- /dev/null
+++ b/flap/tests/02-Interpreter/70-tree.expected
@@ -0,0 +1,15 @@
+1
+2
+4
+8
+16
+32
+64
+128
+256
+512
+1024
+2048
+4096
+8192
+16384
diff --git a/flap/tests/02-Interpreter/71-list-monad.eval.hopix b/flap/tests/02-Interpreter/71-list-monad.eval.hopix
new file mode 100644
index 0000000..203976e
--- /dev/null
+++ b/flap/tests/02-Interpreter/71-list-monad.eval.hopix
@@ -0,0 +1 @@
+(((value(DefineValue(RecFunctions((((value(Id map))(position((start_p(""1 0 4))(end_p(""1 0 7)))))()(FunctionDefinition((value(PTuple(((value(PVariable((value(Id f))(position((start_p(""1 0 9))(end_p(""1 0 10)))))))(position((start_p(""1 0 9))(end_p(""1 0 10)))))((value(PVariable((value(Id l))(position((start_p(""1 0 12))(end_p(""1 0 13)))))))(position((start_p(""1 0 12))(end_p(""1 0 13))))))))(position((start_p(""1 0 8))(end_p(""1 0 14)))))((value(Case((value(Variable((value(Id l))(position((start_p(""2 17 28))(end_p(""2 17 29)))))()))(position((start_p(""2 17 28))(end_p(""2 17 29)))))(((value(Branch((value(PTaggedValue((value(KId N))(position((start_p(""2 17 33))(end_p(""2 17 34)))))()()))(position((start_p(""2 17 33))(end_p(""2 17 34)))))((value(Tagged((value(KId N))(position((start_p(""2 17 38))(end_p(""2 17 39)))))()()))(position((start_p(""2 17 38))(end_p(""2 17 39)))))))(position((start_p(""2 17 33))(end_p(""2 17 39)))))((value(Branch((value(PTaggedValue((value(KId 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diff --git a/flap/tests/02-Interpreter/71-list-monad.eval.hopix.human-readable b/flap/tests/02-Interpreter/71-list-monad.eval.hopix.human-readable
new file mode 100644
index 0000000..3938f61
--- /dev/null
+++ b/flap/tests/02-Interpreter/71-list-monad.eval.hopix.human-readable
@@ -0,0 +1,39 @@
+fun map (f, l) =
+    match (l) { N -> N | C (x, xs) -> C (f (x), map (f, xs)) }
+
+fun concat (l1, l2) =
+    match (l1) { N -> l2 | C (x, xs) -> C (x, concat (xs, l2)) }
+
+fun flatten (l) =
+    match (l) { N -> N | C (l, ls) -> concat (l, flatten (ls)) }
+
+fun return (x) = C (x, N)
+
+fun bind (x, f) = flatten (map (f, x))
+
+let fail = N
+
+fun some d = C (d, N)
+
+fun range (start, stop) =
+    if (start >? stop) then { N } else { C (start, range (start + 1, stop)) }
+
+fun all_sums (start, stop, n) =
+    bind (range (start, stop), \x ->
+    bind (range (start, stop), \y ->
+    if (x + y =? n) then { return (some (x, y, n)) } else { fail }
+    ))
+
+fun show_sum (x, y, n) =
+    print_int (x);
+    print_string (" + ");
+    print_int (y);
+    print_string (" = ");
+    print_int (n);
+    print_string ("\n")
+
+fun iter (f, l) =
+    match (l) { N -> nothing | C (x, xs) -> f (x); iter (f, xs) }
+
+let test =
+    iter (show_sum, flatten (all_sums (13, 73, 73)))
diff --git a/flap/tests/02-Interpreter/71-list-monad.expected b/flap/tests/02-Interpreter/71-list-monad.expected
new file mode 100644
index 0000000..0d86eda
--- /dev/null
+++ b/flap/tests/02-Interpreter/71-list-monad.expected
@@ -0,0 +1,48 @@
+13 + 60 = 73
+14 + 59 = 73
+15 + 58 = 73
+16 + 57 = 73
+17 + 56 = 73
+18 + 55 = 73
+19 + 54 = 73
+20 + 53 = 73
+21 + 52 = 73
+22 + 51 = 73
+23 + 50 = 73
+24 + 49 = 73
+25 + 48 = 73
+26 + 47 = 73
+27 + 46 = 73
+28 + 45 = 73
+29 + 44 = 73
+30 + 43 = 73
+31 + 42 = 73
+32 + 41 = 73
+33 + 40 = 73
+34 + 39 = 73
+35 + 38 = 73
+36 + 37 = 73
+37 + 36 = 73
+38 + 35 = 73
+39 + 34 = 73
+40 + 33 = 73
+41 + 32 = 73
+42 + 31 = 73
+43 + 30 = 73
+44 + 29 = 73
+45 + 28 = 73
+46 + 27 = 73
+47 + 26 = 73
+48 + 25 = 73
+49 + 24 = 73
+50 + 23 = 73
+51 + 22 = 73
+52 + 21 = 73
+53 + 20 = 73
+54 + 19 = 73
+55 + 18 = 73
+56 + 17 = 73
+57 + 16 = 73
+58 + 15 = 73
+59 + 14 = 73
+60 + 13 = 73
diff --git a/flap/tests/02-Interpreter/72-list-monad-3.eval.hopix b/flap/tests/02-Interpreter/72-list-monad-3.eval.hopix
new file mode 100644
index 0000000..de9eb6e
--- /dev/null
+++ b/flap/tests/02-Interpreter/72-list-monad-3.eval.hopix
@@ -0,0 +1 @@
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diff --git a/flap/tests/02-Interpreter/72-list-monad-3.eval.hopix.human-readable b/flap/tests/02-Interpreter/72-list-monad-3.eval.hopix.human-readable
new file mode 100644
index 0000000..5a31d31
--- /dev/null
+++ b/flap/tests/02-Interpreter/72-list-monad-3.eval.hopix.human-readable
@@ -0,0 +1,34 @@
+fun map f = \l ->
+    match (l) { N -> N | C (x, xs) -> C (f x, map f xs) }
+
+fun concat l1 = \l2 ->
+    match (l1) { N -> l2 | C (x, xs) -> C (x, concat xs l2) }
+
+fun flatten l =
+    match (l) { N -> N | C (l, ls) -> concat l (flatten ls) }
+
+fun return (x) = C (x, N)
+
+fun bind x = \f -> flatten (map f x)
+
+fun range (start, stop) = if (start >? stop) then { N } else { C (start, range (start + 1, stop)) }
+
+fun all_sums (start, stop, n) =
+    bind (range (start, stop)) (\x ->
+    bind (range (start, stop)) (\y ->
+    if (x + y =? n) then { return (C ((x, y, n), N)) } else { N }
+    ))
+
+fun show_sum (x, y, n) =
+   print_int (x);
+   print_string (" + ");
+   print_int (y);
+   print_string (" = ");
+   print_int (n);
+   print_string ("\n")
+
+fun iter f = \l ->
+    match (l) { N -> nothing | C (x, xs) -> f x; iter f xs }
+
+let test =
+    iter show_sum (flatten (all_sums (13, 73, 73)))
diff --git a/flap/tests/02-Interpreter/72-list-monad-3.expected b/flap/tests/02-Interpreter/72-list-monad-3.expected
new file mode 100644
index 0000000..0d86eda
--- /dev/null
+++ b/flap/tests/02-Interpreter/72-list-monad-3.expected
@@ -0,0 +1,48 @@
+13 + 60 = 73
+14 + 59 = 73
+15 + 58 = 73
+16 + 57 = 73
+17 + 56 = 73
+18 + 55 = 73
+19 + 54 = 73
+20 + 53 = 73
+21 + 52 = 73
+22 + 51 = 73
+23 + 50 = 73
+24 + 49 = 73
+25 + 48 = 73
+26 + 47 = 73
+27 + 46 = 73
+28 + 45 = 73
+29 + 44 = 73
+30 + 43 = 73
+31 + 42 = 73
+32 + 41 = 73
+33 + 40 = 73
+34 + 39 = 73
+35 + 38 = 73
+36 + 37 = 73
+37 + 36 = 73
+38 + 35 = 73
+39 + 34 = 73
+40 + 33 = 73
+41 + 32 = 73
+42 + 31 = 73
+43 + 30 = 73
+44 + 29 = 73
+45 + 28 = 73
+46 + 27 = 73
+47 + 26 = 73
+48 + 25 = 73
+49 + 24 = 73
+50 + 23 = 73
+51 + 22 = 73
+52 + 21 = 73
+53 + 20 = 73
+54 + 19 = 73
+55 + 18 = 73
+56 + 17 = 73
+57 + 16 = 73
+58 + 15 = 73
+59 + 14 = 73
+60 + 13 = 73
diff --git a/jalons/jalon-2.pdf b/jalons/jalon-2.pdf
new file mode 100644
index 0000000..c3cd417
Binary files /dev/null and b/jalons/jalon-2.pdf differ
diff --git a/tp/tp-reduce-reduce/functions-multiple-arguments/AST.ml b/tp/tp-reduce-reduce/functions-multiple-arguments/AST.ml
new file mode 100644
index 0000000..2e2b8a5
--- /dev/null
+++ b/tp/tp-reduce-reduce/functions-multiple-arguments/AST.ml
@@ -0,0 +1,9 @@
+type expression =
+Var of Id.t
+| Int of int
+| Add of expression * expression
+| Fun of boundN
+| App of expression * expression list
+
+and boundN = { bound : Id.t list;
+               body : expression; }
diff --git a/tp/tp-reduce-reduce/functions-multiple-arguments/Makefile b/tp/tp-reduce-reduce/functions-multiple-arguments/Makefile
new file mode 100644
index 0000000..0e58deb
--- /dev/null
+++ b/tp/tp-reduce-reduce/functions-multiple-arguments/Makefile
@@ -0,0 +1,11 @@
+.PHONY: all clean
+
+MAIN=fun
+
+all:
+	dune build $(MAIN).exe
+	ln -sf _build/default/$(MAIN).exe $(MAIN)
+
+clean:
+	dune clean
+	rm -fr *~ l1
diff --git a/tp/tp-reduce-reduce/functions-multiple-arguments/dune b/tp/tp-reduce-reduce/functions-multiple-arguments/dune
new file mode 100644
index 0000000..eb6e61b
--- /dev/null
+++ b/tp/tp-reduce-reduce/functions-multiple-arguments/dune
@@ -0,0 +1,11 @@
+(ocamllex lexer)
+
+(menhir
+ (flags --explain --inspection --table)
+ (modules parser))
+
+(executable
+ (name fun)
+ (ocamlopt_flags :standard)
+ (libraries menhirLib)
+)
\ No newline at end of file
diff --git a/tp/tp-reduce-reduce/functions-multiple-arguments/dune-project b/tp/tp-reduce-reduce/functions-multiple-arguments/dune-project
new file mode 100644
index 0000000..ca4766b
--- /dev/null
+++ b/tp/tp-reduce-reduce/functions-multiple-arguments/dune-project
@@ -0,0 +1,2 @@
+(lang dune 1.11)
+(using menhir 2.0)
diff --git a/tp/tp-reduce-reduce/functions-multiple-arguments/fun.ml b/tp/tp-reduce-reduce/functions-multiple-arguments/fun.ml
new file mode 100644
index 0000000..5133f58
--- /dev/null
+++ b/tp/tp-reduce-reduce/functions-multiple-arguments/fun.ml
@@ -0,0 +1,32 @@
+let rec interactive_loop () =
+  welcome_message ();
+  let rec loop () =
+    match read () |> eval |> print with
+    | () -> loop ()
+    | exception End_of_file -> print_newline ()
+    | exception exn ->
+       Printf.printf "Error: %s\n%!" (Printexc.to_string exn);
+       loop ()
+  in
+  loop ()
+
+and welcome_message () =
+  Printf.printf ""
+
+and read () =
+  prompt (); input_line stdin |> parse
+
+and prompt () =
+  Printf.printf "> %!"
+
+and parse input =
+  let lexbuf = Lexing.from_string input in
+  Parser.phrase Lexer.token lexbuf
+
+and print e =
+  Printf.printf ":- %s\n%!" (Printer.string_of_exp e)
+
+and eval e =
+  e
+
+let main = interactive_loop ()
diff --git a/tp/tp-reduce-reduce/functions-multiple-arguments/id.ml b/tp/tp-reduce-reduce/functions-multiple-arguments/id.ml
new file mode 100644
index 0000000..c6a8e28
--- /dev/null
+++ b/tp/tp-reduce-reduce/functions-multiple-arguments/id.ml
@@ -0,0 +1 @@
+type t = string
diff --git a/tp/tp-reduce-reduce/functions-multiple-arguments/lexer.mll b/tp/tp-reduce-reduce/functions-multiple-arguments/lexer.mll
new file mode 100644
index 0000000..28aef70
--- /dev/null
+++ b/tp/tp-reduce-reduce/functions-multiple-arguments/lexer.mll
@@ -0,0 +1,21 @@
+{ (* Emacs, open this file with -*- tuareg -*- *)
+  open Parser
+}
+
+let layout = ' ' | '\t' | '\n'
+let number = ['0'-'9']+
+let identifier = ['a'-'z']['A'-'Z' '0'-'9' 'a'-'z' '_']*
+
+rule token = parse
+| eof             { EOF }
+| layout          { token lexbuf }
+| number as i     { INT (int_of_string i) }
+| "fun"           { FUN }
+| identifier as s { ID s }
+| "("             { LP }
+| ")"             { RP }
+| "->"            { RIGHT_ARROW }
+| "+"             { PLUS }
+| _ as c {
+  failwith (Printf.sprintf "Invalid character: %c\n" c)
+}
diff --git a/tp/tp-reduce-reduce/functions-multiple-arguments/parser.mly b/tp/tp-reduce-reduce/functions-multiple-arguments/parser.mly
new file mode 100644
index 0000000..3243332
--- /dev/null
+++ b/tp/tp-reduce-reduce/functions-multiple-arguments/parser.mly
@@ -0,0 +1,35 @@
+%{ (* Emacs, open this with -*- tuareg -*- *)
+open AST
+%}
+
+%token<int> INT
+%token<string> ID
+%token PLUS EOF FUN RIGHT_ARROW LP RP
+
+%start<AST.expression> phrase
+
+%nonassoc RIGHT_ARROW
+%left PLUS
+
+%nonassoc prec_application
+
+%nonassoc LP INT ID FUN
+
+%%
+
+phrase:
+  e=expression EOF { e }
+
+arguments:
+ | e=expression { [ e ] } %prec prec_application
+ | hd=expression tl=arguments { hd::tl }
+
+expression:
+ | LP e=expression RP { e }
+ | n=INT { Int n }
+ | x=ID  { Var x }
+ | e1=expression PLUS e2=expression { Add (e1, e2) }
+ | FUN vars=nonempty_list(ID) RIGHT_ARROW e=expression
+   { Fun { bound=vars; body=e }}
+ | f=expression args=arguments
+   { App (f, args) }
diff --git a/tp/tp-reduce-reduce/functions-multiple-arguments/printer.ml b/tp/tp-reduce-reduce/functions-multiple-arguments/printer.ml
new file mode 100644
index 0000000..81db7c7
--- /dev/null
+++ b/tp/tp-reduce-reduce/functions-multiple-arguments/printer.ml
@@ -0,0 +1,18 @@
+open AST
+
+let string_of_exp e =
+  let rec aux = function
+    | Var x ->
+       x
+    | Int x ->
+       string_of_int x
+    | Add (e1, e2) ->
+       Printf.sprintf "(%s + %s)" (aux e1) (aux e2)
+    | Fun b ->
+       Printf.sprintf "(fun %s -> %s)"
+         (String.concat " " b.bound)
+         (aux b.body)
+    | App (f, a) ->
+       "(" ^ String.concat " " (List.map aux (f::a)) ^ ")"
+  in
+  aux e