42 lines
923 B
OCaml
42 lines
923 B
OCaml
open Ast
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open Lexing
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exception LexerError of char
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exception SemanticsError of string * Lexing.position
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let err msg pos =
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Printf.eprintf
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"Error on line %d col %d: %s.\n"
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pos.pos_lnum
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(pos.pos_cnum - pos.pos_bol)
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msg;
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exit 1
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;;
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let errt expected given pos =
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let rec string_of_type_t = function
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| Int_t -> "int"
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| Bool_t -> "bool"
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| Func_t (r, a) ->
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(if List.length a > 1 then "(" else "")
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^ String.concat ", " (List.map string_of_type_t a)
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^ (if List.length a > 1 then ")" else "")
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^ " -> "
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^ string_of_type_t r
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in
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raise
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(SemanticsError
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( Printf.sprintf
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"Expected %s but given %s"
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(string_of_type_t expected)
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(string_of_type_t given)
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, pos ))
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;;
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let warn msg (pos : Lexing.position) =
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Printf.eprintf
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"Warning on line %d col %d: %s.\n"
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pos.pos_lnum
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(pos.pos_cnum - pos.pos_bol)
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msg
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;;
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