(* Title: Pure/ML-Systems/compiler_polyml.ML
Basic runtime compilation for Poly/ML (cf. Pure/ML/ml_compiler_polyml.ML).
*)
local
fun drop_newline s =
if String.isSuffix "\n" s then String.substring (s, 0, size s - 1)
else s;
in
fun use_text ({tune_source, name_space, str_of_pos, print, error, ...}: use_context)
(line, file) verbose txt =
let
val current_line = Unsynchronized.ref line;
val in_buffer =
Unsynchronized.ref (String.explode (tune_source (ml_positions line file txt)));
val out_buffer = Unsynchronized.ref ([]: string list);
fun output () = drop_newline (implode (rev (! out_buffer)));
fun get () =
(case ! in_buffer of
[] => NONE
| c :: cs =>
(in_buffer := cs; if c = #"\n" then current_line := ! current_line + 1 else (); SOME c));
fun put s = out_buffer := s :: ! out_buffer;
fun put_message {message = msg1, hard, location = {startLine = message_line, ...}, context} =
(put (if hard then "Error: " else "Warning: ");
PolyML.prettyPrint (put, 76) msg1;
(case context of NONE => () | SOME msg2 => PolyML.prettyPrint (put, 76) msg2);
put ("At" ^ str_of_pos message_line file ^ "\n"));
val parameters =
[PolyML.Compiler.CPOutStream put,
PolyML.Compiler.CPNameSpace name_space,
PolyML.Compiler.CPErrorMessageProc put_message,
PolyML.Compiler.CPLineNo (fn () => ! current_line),
PolyML.Compiler.CPFileName file,
PolyML.Compiler.CPPrintInAlphabeticalOrder false];
val _ =
(while not (List.null (! in_buffer)) do
PolyML.compiler (get, parameters) ())
handle exn =>
if Exn.is_interrupt exn then reraise exn
else
(put ("Exception- " ^ General.exnMessage exn ^ " raised");
error (output ()); reraise exn);
in if verbose then print (output ()) else () end;
fun use_file context verbose file =
let
val instream = TextIO.openIn file;
val txt = Exn.release (Exn.capture TextIO.inputAll instream before TextIO.closeIn instream);
in use_text context (1, file) verbose txt end;
end;