27 lines
536 B
OCaml
27 lines
536 B
OCaml
(* Auxiliary functions for parsing *)
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type error =
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Unbound of string
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exception Error of error
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let tbl_ident = (Hashtbl.new 57 : (string, Ident.t) Hashtbl.t)
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let bind_ident s =
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let id = Ident.new s in
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Hashtbl.add tbl_ident s id;
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id
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let find_ident s =
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try
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Hashtbl.find tbl_ident s
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with Not_found ->
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raise(Error(Unbound s))
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let unbind_ident id =
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Hashtbl.remove tbl_ident (Ident.name id)
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let report_error = function
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Unbound s ->
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prerr_string "Unbound identifier "; prerr_string s; prerr_endline "."
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