1//
2//  RuleReturnScope.m
3//  ANTLR
4//
5//  Created by Alan Condit on 6/17/10.
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 "RuleReturnScope.h"
33
34
35@implementation RuleReturnScope
36
37/** Return the start token or tree */
38- (id) getStart
39{
40    return nil;
41}
42
43/** Return the stop token or tree */
44- (id) getStop
45{
46    return nil;
47}
48
49/** Has a value potentially if output=AST; */
50- (id) getTree
51{
52    return nil;
53}
54
55/** Has a value potentially if output=template; Don't use StringTemplate
56 *  type as it then causes a dependency with ST lib.
57 */
58- (id) getTemplate
59{
60    return nil;
61}
62
63// create a copy, including the text if available
64// the input stream is *not* copied!
65- (id) copyWithZone:(NSZone *)theZone
66{
67    RuleReturnScope *copy = [[[self class] allocWithZone:theZone] init];
68    return copy;
69}
70
71@end
72