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
