1/* 2 * [The "BSD license"] 3 * Copyright (c) 2011 Terence Parr 4 * All rights reserved. 5 * 6 * Conversion to C#: 7 * Copyright (c) 2011 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 33tree grammar ProfileTreeGrammar; 34 35options 36{ 37 language=CSharp3; 38 tokenVocab=ProfileGrammar; 39 ASTLabelType=CommonTree; 40} 41 42// START:members 43@header 44{ 45//import java.util.Map; 46//import java.util.HashMap; 47using BigInteger = java.math.BigInteger; 48using Console = System.Console; 49} 50// END:members 51 52@namespace{Antlr3.Runtime.Test.BuildOptions} 53 54// START:rules 55prog: stat* 56 ; 57 58stat: expr { string result = $expr.value.ToString(); 59 Console.Out.WriteLine($expr.value + " (about " + result[0] + "*10^" + (result.Length-1) + ")"); 60 } 61 | ^('=' ID expr) { globalMemory[$ID.text] = $expr.value; } 62 | ^(FUNC .+) // ignore FUNCs - we added them to functionDefinitions already in parser. 63 ; 64 65expr returns [BigInteger value] 66 : ^('+' a=expr b=expr) { $value = $a.value.add($b.value); } 67 | ^('-' a=expr b=expr) { $value = $a.value.subtract($b.value); } 68 | ^('*' a=expr b=expr) { $value = $a.value.multiply($b.value); } 69 | ^('/' a=expr b=expr) { $value = $a.value.divide($b.value); } 70 | ^('%' a=expr b=expr) { $value = $a.value.remainder($b.value); } 71 | ID { $value = getValue($ID.text); } 72 | INT { $value = new BigInteger($INT.text); } 73 | call { $value = $call.value; } 74 ; 75 76call returns [BigInteger value] 77 : ^(CALL ID expr) { BigInteger p = $expr.value; 78 CommonTree funcRoot = findFunction($ID.text, p); 79 if (funcRoot == null) { 80 Console.Error.WriteLine("No match found for " + $ID.text + "(" + p + ")"); 81 } else { 82 // Here we set up the local evaluator to run over the 83 // function definition with the parameter value. 84 // This re-reads a sub-AST of our input AST! 85 ProfileTreeGrammar e = new ProfileTreeGrammar(funcRoot, functionDefinitions, globalMemory, p); 86 $value = e.expr(); 87 } 88 } 89 ; 90// END:rules 91