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 FastSimpleExpression; 34 35 options 36 { 37 language=CSharp3; 38 //slim=true; 39 output=AST; 40 ASTLabelType=CommonTree; 41 } 42 43 @lexer::superClass{Antlr.Runtime.SlimLexer} 44 45 public 46 expression 47 : additive_expression 48 EOF 49 ; 50 51 additive_expression 52 : multiplicative_expression 53 ( ('+'^ | '-'^) 54 multiplicative_expression 55 )* 56 ; 57 58 multiplicative_expression 59 : atom 60 ( ('*'^ | '/'^ | '%'^) 61 atom 62 )* 63 ; 64 65 atom 66 : IDENTIFIER 67 | NUMBER 68 ; 69 70 // 71 // LEXER 72 // 73 74 IDENTIFIER 75 : ('a'..'z' | 'A'..'Z' | '_') 76 ('a'..'z' | 'A'..'Z' | '_' | '0'..'9')* 77 ; 78 79 NUMBER 80 : '0'..'9'+ 81 ; 82 83 WS 84 : (' ' | '\t' | '\n' | '\r' | '\f') 85 {$channel = Hidden;} 86 ; 87
