1324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver/* 2324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * [The "BSD licence"] 3324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Copyright (c) 2005-2008 Terence Parr 4324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * All rights reserved. 5324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 6324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Conversion to C#: 7324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc. 8324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * All rights reserved. 9324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 10324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Redistribution and use in source and binary forms, with or without 11324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * modification, are permitted provided that the following conditions 12324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * are met: 13324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 1. Redistributions of source code must retain the above copyright 14324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * notice, this list of conditions and the following disclaimer. 15324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 2. Redistributions in binary form must reproduce the above copyright 16324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * notice, this list of conditions and the following disclaimer in the 17324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * documentation and/or other materials provided with the distribution. 18324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 3. The name of the author may not be used to endorse or promote products 19324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * derived from this software without specific prior written permission. 20324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 21324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver */ 32324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 33324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruvergrammar Expr; 34324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 35324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver/* 36324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver I had to make the following changes to the basic Expr grammar to make it work with the CSharp3 target in "Java compatibility mode". 37324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver For reference, see http://www.antlr.org/wiki/display/ANTLR3/Expression+evaluator. 38324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 39324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver Add an options section to set the language to CSharp3. 40324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 41324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver In the @header section, add: 42324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // 'member' is obsolete 43324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver #pragma warning disable 612 44324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver using Antlr.Runtime.JavaExtensions; 45324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 46324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver In the @header section, replace: 47324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver import java.util.HashMap; 48324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver with: 49324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver using HashMap = System.Collections.Generic.Dictionary<object,object>; 50324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 51324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver Change all instances of "System.out" with "JSystem.@out". 52324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 53324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver Change all instances of "System.err" with "JSystem.err". 54324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 55324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver Change all instances of "skip()" with "Skip()". 56324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver */ 57324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 58324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruveroptions 59324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver{ 60324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver language=CSharp3; 61324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver} 62324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 63324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver@header { 64324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver// 'member' is obsolete 65324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver#pragma warning disable 612 66324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 67324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverusing Antlr.Runtime.JavaExtensions; 68324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverusing HashMap = System.Collections.Generic.Dictionary<object,object>; 69324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverusing Integer = java.lang.Integer; 70324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver} 71324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 72324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver@members { 73324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver/** Map variable name to Integer object holding value */ 74324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverHashMap memory = new HashMap(); 75324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver} 76324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 77324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverprog: stat+ ; 78324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 79324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverstat: expr NEWLINE {JSystem.@out.println($expr.value);} 80324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver | ID '=' expr NEWLINE 81324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver {memory.put($ID.text, new Integer($expr.value));} 82324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver | NEWLINE 83324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ; 84324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 85324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverexpr returns [int value] 86324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver : e=multExpr {$value = $e.value;} 87324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ( '+' e=multExpr {$value += $e.value;} 88324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver | '-' e=multExpr {$value -= $e.value;} 89324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver )* 90324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ; 91324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 92324c4644fee44b9898524c09511bd33c3f12e2dfBen GruvermultExpr returns [int value] 93324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver : e=atom {$value = $e.value;} ('*' e=atom {$value *= $e.value;})* 94324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ; 95324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 96324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruveratom returns [int value] 97324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver : INT {$value = Integer.parseInt($INT.text);} 98324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver | ID 99324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 100324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver Integer v = (Integer)memory.get($ID.text); 101324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( v!=null ) $value = v.intValue(); 102324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver else JSystem.err.println("undefined variable "+$ID.text); 103324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 104324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver | '(' expr ')' {$value = $expr.value;} 105324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ; 106324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 107324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverID : ('a'..'z'|'A'..'Z')+ ; 108324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverINT : '0'..'9'+ ; 109324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverNEWLINE:'\r'? '\n' ; 110324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverWS : (' '|'\t')+ {Skip();} ; 111