src/Pure/ML-Systems/compiler_polyml-5.2.ML
changeset 31312 1c00e4ff3c99
child 31480 05937d6aafb5
equal deleted inserted replaced
31311:b82e55f51dcc 31312:1c00e4ff3c99
       
     1 (*  Title:      Pure/ML-Systems/compiler_polyml-5.2.ML
       
     2 
       
     3 Runtime compilation for Poly/ML 5.2 and 5.2.1.
       
     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 current_line = ref start_line;
       
    18     val in_buffer = ref (String.explode (tune_source txt));
       
    19     val out_buffer = 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 =>
       
    26           (in_buffer := cs; if c = #"\n" then current_line := ! current_line + 1 else (); SOME c));
       
    27     fun put s = out_buffer := s :: ! out_buffer;
       
    28     fun message (msg, is_err, line) =
       
    29       (if is_err then "Error: " else "Warning: ") ^ drop_newline msg ^ str_of_pos line name ^ "\n";
       
    30 
       
    31     val parameters =
       
    32      [PolyML.Compiler.CPOutStream put,
       
    33       PolyML.Compiler.CPLineNo (fn () => ! current_line),
       
    34       PolyML.Compiler.CPErrorMessageProc (put o message),
       
    35       PolyML.Compiler.CPNameSpace name_space];
       
    36     val _ =
       
    37       (while not (List.null (! in_buffer)) do
       
    38         PolyML.compiler (get, parameters) ())
       
    39       handle exn =>
       
    40        (put ("Exception- " ^ General.exnMessage exn ^ " raised");
       
    41         error (output ()); raise exn);
       
    42   in if verbose then print (output ()) else () end;
       
    43 
       
    44 fun use_file context verbose name =
       
    45   let
       
    46     val instream = TextIO.openIn name;
       
    47     val txt = Exn.release (Exn.capture TextIO.inputAll instream before TextIO.closeIn instream);
       
    48   in use_text context (1, name) verbose txt end;
       
    49 
       
    50 end;
       
    51