1// 2// ANTLRTreeVisitorAction.m 3// ANTLR 4// 5// Created by Alan Condit on 6/18/10. 6// [The "BSD licence"] 7// Copyright (c) 2010 Alan Condit 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#import "ANTLRTreeVisitorAction.h" 33 34 35@implementation ANTLRTreeVisitorAction 36 37+ (ANTLRTreeVisitorAction *)newANTLRTreeVisitorAction 38{ 39 return [[ANTLRTreeVisitorAction alloc] init]; 40} 41 42- (id) init 43{ 44 if ((self = [super init]) != nil ) { 45 } 46 return self; 47} 48 49/** Execute an action before visiting children of t. Return t or 50 * a rewritten t. It is up to the visitor to decide what to do 51 * with the return value. Children of returned value will be 52 * visited if using TreeVisitor.visit(). 53 */ 54- (ANTLRTreeVisitorAction *)pre:(ANTLRTreeVisitorAction *) t 55{ 56 return nil; 57} 58 59/** Execute an action after visiting children of t. Return t or 60 * a rewritten t. It is up to the visitor to decide what to do 61 * with the return value. 62 */ 63- (ANTLRTreeVisitorAction *)post:(ANTLRTreeVisitorAction *) t 64{ 65 return nil; 66} 67 68 69@end 70