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Initial parsing and pretty-printing
author Adam Chlipala <adamc@hcoop.net>
date Sat, 26 Jan 2008 12:35:32 -0500
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children 5c3cc348e9e6
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0:502c6d622477 1:4202f6eda946
1 (* Copyright (c) 2008, Adam Chlipala
2 * All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * - Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 * - Redistributions in binary form must reproduce the above copyright notice,
10 * this list of conditions and the following disclaimer in the documentation
11 * and/or other materials provided with the distribution.
12 * - The names of contributors may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
26 *)
27
28 (* Laconic/Web language parser *)
29
30 structure Compiler :> COMPILER = struct
31
32 structure LacwebLrVals = LacwebLrValsFn(structure Token = LrParser.Token)
33 structure Lex = LacwebLexFn(structure Tokens = LacwebLrVals.Tokens)
34 structure LacwebP = Join(structure ParserData = LacwebLrVals.ParserData
35 structure Lex = Lex
36 structure LrParser = LrParser)
37
38 (* The main parsing routine *)
39 fun parse filename =
40 let
41 val () = (ErrorMsg.resetErrors ();
42 ErrorMsg.resetPositioning filename)
43 val file = TextIO.openIn filename
44 fun get _ = TextIO.input file
45 fun parseerror (s, p1, p2) = ErrorMsg.errorAt' (p1, p2) s
46 val lexer = LrParser.Stream.streamify (Lex.makeLexer get)
47 val (absyn, _) = LacwebP.parse (30, lexer, parseerror, ())
48 in
49 TextIO.closeIn file;
50 SOME absyn
51 end
52 handle LrParser.ParseError => NONE
53
54 fun testParse filename =
55 case parse filename of
56 NONE => print "Parse error\n"
57 | SOME file =>
58 if ErrorMsg.anyErrors () then
59 print "Recoverable parse error\n"
60 else
61 (Print.print (LaconicPrint.p_file file);
62 print "\n")
63
64 end