1 /* 2 * [The "BSD licence"] 3 * Copyright (c) 2005-2008 Terence Parr 4 * All rights reserved. 5 * 6 * Conversion to C#: 7 * Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 grammar DebugGrammar; 34 35 options 36 { 37 language=CSharp3; 38 output=AST; 39 ASTLabelType=CommonTree; 40 } 41 42 tokens 43 { 44 // define pseudo-operations 45 FUNC; 46 CALL; 47 } 48 49 // START:stat 50 prog: ( stat )* 51 ; 52 53 stat: expr NEWLINE -> expr 54 | ID '=' expr NEWLINE -> ^('=' ID expr) 55 | func NEWLINE -> func 56 | NEWLINE -> // ignore 57 ; 58 59 func: ID '(' formalPar ')' '=' expr -> ^(FUNC ID formalPar expr) 60 ; 61 finally { 62 functionDefinitions.Add($func.tree); 63 } 64 65 formalPar 66 : ID 67 | INT 68 ; 69 70 // END:stat 71 72 // START:expr 73 expr: multExpr (('+'^|'-'^) multExpr)* 74 ; 75 76 multExpr 77 : atom (('*'|'/'|'%')^ atom)* 78 ; 79 80 atom: INT 81 | ID 82 | '(' expr ')' -> expr 83 | ID '(' expr ')' -> ^(CALL ID expr) 84 ; 85 // END:expr 86 87 // START:tokens 88 ID : ('a'..'z'|'A'..'Z')+ 89 ; 90 91 INT : '0'..'9'+ 92 ; 93 94 NEWLINE 95 : '\r'? '\n' 96 ; 97 98 WS : (' '|'\t')+ { Skip(); } 99 ; 100 // END:tokens 101
