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(* Copyright (c) 2008, Adam Chlipala
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - The names of contributors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*)
(* Laconic/Web language parser *)
structure Compiler :> COMPILER = struct
structure LacwebLrVals = LacwebLrValsFn(structure Token = LrParser.Token)
structure Lex = LacwebLexFn(structure Tokens = LacwebLrVals.Tokens)
structure LacwebP = Join(structure ParserData = LacwebLrVals.ParserData
structure Lex = Lex
structure LrParser = LrParser)
(* The main parsing routine *)
fun parse filename =
let
val () = (ErrorMsg.resetErrors ();
ErrorMsg.resetPositioning filename)
val file = TextIO.openIn filename
fun get _ = TextIO.input file
fun parseerror (s, p1, p2) = ErrorMsg.errorAt' (p1, p2) s
val lexer = LrParser.Stream.streamify (Lex.makeLexer get)
val (absyn, _) = LacwebP.parse (30, lexer, parseerror, ())
in
TextIO.closeIn file;
SOME absyn
end
handle LrParser.ParseError => NONE
fun testParse filename =
case parse filename of
NONE => print "Parse error\n"
| SOME file =>
if ErrorMsg.anyErrors () then
print "Recoverable parse error\n"
else
(Print.print (LaconicPrint.p_file file);
print "\n")
end
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