1// 2// ANTLRStreamEnumertor.m 3// ANTLR 4// 5// Created by Ian Michell on 29/04/2010. 6// [The "BSD licence"] 7// Copyright (c) 2010 Ian Michell 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 "ANTLRStreamEnumerator.h" 33 34 35@implementation ANTLRStreamEnumerator 36 37-(id) init 38{ 39 self = [super init]; 40 if (self) 41 { 42 i = 0; 43 } 44 return self; 45} 46 47-(id) initWithNodes:(AMutableArray *) n andEOF:(id) obj 48{ 49 self = [self init]; 50 if (self) 51 { 52 nodes = n; 53 eof = obj; 54 } 55 return self; 56} 57 58-(BOOL) hasNext 59{ 60 return i < [nodes count]; 61} 62 63-(id) nextObject 64{ 65 NSUInteger current = i; 66 i++; 67 if (current < [nodes count]) 68 { 69 return [nodes objectAtIndex:current]; 70 } 71 return eof; 72} 73 74@synthesize i; 75@synthesize eof; 76@synthesize nodes; 77@end 78