49 lines
1.4 KiB
OCaml
49 lines
1.4 KiB
OCaml
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(* Driver for the parser of Mini-ML *)
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(* Error printing and exception tracing *)
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Printexc.record_backtrace true;;
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(* Path to the Mini-ML standard library *)
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let lib_path =
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match EvalOpt.libs with
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[] -> ""
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| libs -> let mk_I dir path = Printf.sprintf " -I %s%s" dir path
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in List.fold_right mk_I libs ""
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(* Opening the input channel and setting the lexing engine *)
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let cin, reset =
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match EvalOpt.input with
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None | Some "-" -> stdin, fun ?(line=1) _buffer -> ignore line
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| Some file -> open_in file, Lexer.reset ~file
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let buffer = Lexing.from_channel cin
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let () = reset buffer
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(* Tokeniser *)
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let tokeniser =
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if Utils.String.Set.mem "lexer" EvalOpt.verbose then
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Lexer.get_token ~log:(stdout, Lexer.output_token buffer)
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else Lexer.get_token ?log:None
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let () =
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try
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let ast = Parser.program tokeniser buffer in
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if Utils.String.Set.mem "unparsing" EvalOpt.verbose then
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AST.print_tokens ~undo:true ast
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else () (* AST.print_tokens ast *)
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with
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Lexer.Error diag ->
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close_in cin; Lexer.prerr ~kind:"Lexical" diag
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| Parser.Error ->
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let start = Pos.from_byte (Lexing.lexeme_start_p buffer)
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and stop = Pos.from_byte (Lexing.lexeme_end_p buffer) in
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let region = Region.make ~start ~stop in
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close_in cin;
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Lexer.prerr ~kind:"Syntactical"
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Region.{value="Parse error."; region}
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| Sys_error msg -> Utils.highlight msg
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