1 // 2 // ANTLRTreeVisitorAction.h 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 <Cocoa/Cocoa.h> 33 34 35 @interface ANTLRTreeVisitorAction : NSObject 36 { 37 38 } 39 40 + (ANTLRTreeVisitorAction *)newANTLRTreeVisitorAction; 41 - (id) init; 42 43 /** Execute an action before visiting children of t. Return t or 44 * a rewritten t. It is up to the visitor to decide what to do 45 * with the return value. Children of returned value will be 46 * visited if using TreeVisitor.visit(). 47 */ 48 - (ANTLRTreeVisitorAction *)pre:(ANTLRTreeVisitorAction *) t; 49 50 /** Execute an action after visiting children of t. Return t or 51 * a rewritten t. It is up to the visitor to decide what to do 52 * with the return value. 53 */ 54 - (ANTLRTreeVisitorAction *)post:(ANTLRTreeVisitorAction *) t; 55 56 @end 57