79 lines
2.9 KiB
Standard ML
79 lines
2.9 KiB
Standard ML
(*****************************************************************************
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* su4sml --- an SML repository for managing (Secure)UML/OCL models
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* http://projects.brucker.ch/su4sml/
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*
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* polyml.sml --- interactive eval
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* This file is part of su4sml.
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*
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* Copyright (c) 2005-2007, ETH Zurich, Switzerland
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* * Neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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******************************************************************************)
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(* $Id$ *)
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structure CompilerExt : COMPILER_EXT =
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struct
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exception EvalNotSupported
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fun drop_last [] = []
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| drop_last [x] = []
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| drop_last (x :: xs) = x :: drop_last xs;
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fun eval verbose txt =
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let
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fun eval_fh (print, err) verbose txt =
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let
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val in_buffer = ref (SML90.explode txt);
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val out_buffer = ref ([]: string list);
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fun output () = SML90.implode (drop_last (rev (! out_buffer)));
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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 => (err (output ()); raise exn);
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if verbose then print (output ()) else ()
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end
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in
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eval_fh (fn s => print (s^"\n"), fn s => Logger.error (s^"\n")) verbose txt
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end
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fun exnHistory _ = []
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end
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