src/Pure/ML-Systems/compiler_polyml-5.0.ML

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Pure/ML-Systems/compiler_polyml-5.0.ML	Sun May 31 14:51:21 2009 +0200
@@ -0,0 +1,32 @@
+(*  Title:      Pure/ML-Systems/compiler_polyml-5.0.ML
+
+Runtime compilation -- for PolyML.compilerEx in version 5.0 and 5.1.
+*)
+
+fun use_text ({tune_source, print, error, ...}: use_context) (line, name) verbose txt =
+  let
+    val in_buffer = ref (explode (tune_source txt));
+    val out_buffer = ref ([]: string list);
+    fun output () = implode (rev (case ! out_buffer of "\n" :: cs => cs | cs => cs));
+
+    val current_line = ref line;
+    fun get () =
+      (case ! in_buffer of
+        [] => ""
+      | c :: cs => (in_buffer := cs; if c = "\n" then current_line := ! current_line + 1 else (); c));
+    fun put s = out_buffer := s :: ! out_buffer;
+
+    fun exec () =
+      (case ! in_buffer of
+        [] => ()
+      | _ => (PolyML.compilerEx (get, put, fn () => ! current_line, name) (); exec ()));
+  in
+    exec () handle exn => (error (output ()); raise exn);
+    if verbose then print (output ()) else ()
+  end;
+
+fun use_file context verbose name =
+  let
+    val instream = TextIO.openIn name;
+    val txt = Exn.release (Exn.capture TextIO.inputAll instream before TextIO.closeIn instream);
+  in use_text context (1, name) verbose txt end;