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