6 lines
349 B
Standard ML
6 lines
349 B
Standard ML
type e =
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| EInt of int (** Ex: "42", "31" *)
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| EVar of string (** Ex: "x", "y", "foo" *)
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| EPlus of e * e (** Ex: "1 + 2", "2 * 3 + 4" *)
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| EMult of e * e (** Ex: "1 * 2", "(1 + 2) * 3" *)
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| ESum of string * e * e * e (** Ex: "sum (x, 1, 10, x * x)" *)
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