src/Pure/ML-Systems/polyml_old_compiler4.ML
author wenzelm
Sun Mar 01 23:36:12 2009 +0100 (2009-03-01)
changeset 30190 479806475f3c
parent 29564 f8b933a62151
child 30672 beaadd5af500
permissions -rw-r--r--
use long names for old-style fold combinators;
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(*  Title:      Pure/ML-Systems/polyml_old_compiler4.ML
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Runtime compilation -- for old PolyML.compiler (version 4.x).
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*)
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fun use_text (tune: string -> string) _ _ (line: int, name) (print, err) verbose txt =
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  let
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    val in_buffer = ref (explode (tune txt));
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    val out_buffer = ref ([]: string list);
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    fun output () = implode (rev (case ! out_buffer of "\n" :: cs => cs | cs => cs));
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    fun get () =
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      (case ! in_buffer of
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        [] => ""
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      | c :: cs => (in_buffer := cs; c));
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    fun put s = out_buffer := s :: ! out_buffer;
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    fun exec () =
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      (case ! in_buffer of
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        [] => ()
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      | _ => (PolyML.compiler (get, put) (); exec ()));
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  in
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    exec () handle exn =>
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      (err ((if name = "" then "" else "Error in " ^ name ^ "\n") ^ output ()); raise exn);
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    if verbose then print (output ()) else ()
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  end;
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fun use_file tune str_of_pos name_space output verbose name =
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  let
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    val instream = TextIO.openIn name;
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    val txt = Exn.release (Exn.capture TextIO.inputAll instream before TextIO.closeIn instream);
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  in use_text tune str_of_pos name_space (1, name) output verbose txt end;