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