src/Pure/ML-Systems/compiler_polyml-5.3.ML
author wenzelm
Tue Sep 29 11:49:22 2009 +0200 (2009-09-29)
changeset 32738 15bb09ca0378
parent 31480 05937d6aafb5
child 33538 edf497b5b5d2
permissions -rw-r--r--
explicit indication of Unsynchronized.ref;
     1 (*  Title:      Pure/ML-Systems/compiler_polyml-5.3.ML
     2 
     3 Runtime compilation for Poly/ML 5.3.
     4 *)
     5 
     6 local
     7 
     8 fun drop_newline s =
     9   if String.isSuffix "\n" s then String.substring (s, 0, size s - 1)
    10   else s;
    11 
    12 in
    13 
    14 fun use_text ({tune_source, name_space, str_of_pos, print, error, ...}: use_context)
    15     (start_line, name) verbose txt =
    16   let
    17     val line = Unsynchronized.ref start_line;
    18     val in_buffer = Unsynchronized.ref (String.explode (tune_source txt));
    19     val out_buffer = Unsynchronized.ref ([]: string list);
    20     fun output () = drop_newline (implode (rev (! out_buffer)));
    21 
    22     fun get () =
    23       (case ! in_buffer of
    24         [] => NONE
    25       | c :: cs => (in_buffer := cs; if c = #"\n" then line := ! line + 1 else (); SOME c));
    26     fun put s = out_buffer := s :: ! out_buffer;
    27     fun put_message {message = msg1, hard, location = {startLine = line, ...}, context} =
    28      (put (if hard then "Error: " else "Warning: ");
    29       PolyML.prettyPrint (put, 76) msg1;
    30       (case context of NONE => () | SOME msg2 => PolyML.prettyPrint (put, 76) msg2);
    31       put ("At" ^ str_of_pos line name ^ "\n"));
    32 
    33     val parameters =
    34      [PolyML.Compiler.CPOutStream put,
    35       PolyML.Compiler.CPNameSpace name_space,
    36       PolyML.Compiler.CPErrorMessageProc put_message,
    37       PolyML.Compiler.CPLineNo (fn () => ! line),
    38       PolyML.Compiler.CPFileName name,
    39       PolyML.Compiler.CPPrintInAlphabeticalOrder false];
    40     val _ =
    41       (while not (List.null (! in_buffer)) do
    42         PolyML.compiler (get, parameters) ())
    43       handle exn =>
    44        (put ("Exception- " ^ General.exnMessage exn ^ " raised");
    45         error (output ()); reraise exn);
    46   in if verbose then print (output ()) else () end;
    47 
    48 fun use_file context verbose name =
    49   let
    50     val instream = TextIO.openIn name;
    51     val txt = Exn.release (Exn.capture TextIO.inputAll instream before TextIO.closeIn instream);
    52   in use_text context (1, name) verbose txt end;
    53 
    54 end;
    55