| // |
| // ANTLRRewriteRuleSubtreeStream.m |
| // ANTLR |
| // |
| // Created by Kay Röpke on 7/16/07. |
| // [The "BSD licence"] |
| // Copyright (c) 2007 Kay Röpke 2010 Alan Condit |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions |
| // are met: |
| // 1. Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // 2. Redistributions in binary form must reproduce the above copyright |
| // notice, this list of conditions and the following disclaimer in the |
| // documentation and/or other materials provided with the distribution. |
| // 3. The name of the author may not be used to endorse or promote products |
| // derived from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| // IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| // NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| // THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #import "ANTLRRewriteRuleSubtreeStream.h" |
| |
| |
| @implementation ANTLRRewriteRuleSubtreeStream |
| |
| + (ANTLRRewriteRuleSubtreeStream*) newANTLRRewriteRuleSubtreeStream:(id<ANTLRTreeAdaptor>)aTreeAdaptor |
| description:(NSString *)anElementDescription; |
| { |
| return [[ANTLRRewriteRuleSubtreeStream alloc] initWithTreeAdaptor:aTreeAdaptor |
| description:anElementDescription]; |
| } |
| |
| + (ANTLRRewriteRuleSubtreeStream*) newANTLRRewriteRuleSubtreeStream:(id<ANTLRTreeAdaptor>)aTreeAdaptor |
| description:(NSString *)anElementDescription |
| element:(id)anElement; |
| { |
| return [[ANTLRRewriteRuleSubtreeStream alloc] initWithTreeAdaptor:aTreeAdaptor |
| description:anElementDescription |
| element:anElement]; |
| } |
| |
| + (ANTLRRewriteRuleSubtreeStream*) newANTLRRewriteRuleSubtreeStream:(id<ANTLRTreeAdaptor>)aTreeAdaptor |
| description:(NSString *)anElementDescription |
| elements:(NSArray *)theElements; |
| { |
| return [[ANTLRRewriteRuleSubtreeStream alloc] initWithTreeAdaptor:aTreeAdaptor |
| description:anElementDescription |
| elements:theElements]; |
| } |
| |
| - (id) initWithTreeAdaptor:(id<ANTLRTreeAdaptor>)aTreeAdaptor description:(NSString *)anElementDescription |
| { |
| if ((self = [super initWithTreeAdaptor:aTreeAdaptor description:anElementDescription]) != nil) { |
| dirty = NO; |
| isSingleElement = YES; |
| } |
| return self; |
| } |
| |
| - (id) initWithTreeAdaptor:(id<ANTLRTreeAdaptor>)aTreeAdaptor description:(NSString *)anElementDescription element:(id)anElement |
| { |
| if ((self = [super initWithTreeAdaptor:aTreeAdaptor description:anElementDescription element:anElement]) != nil) { |
| dirty = NO; |
| } |
| return self; |
| } |
| |
| - (id) initWithTreeAdaptor:(id<ANTLRTreeAdaptor>)aTreeAdaptor description:(NSString *)anElementDescription elements:(NSArray *)theElements |
| { |
| if ((self = [super initWithTreeAdaptor:aTreeAdaptor description:anElementDescription elements:theElements]) != nil) { |
| dirty = NO; |
| } |
| return self; |
| } |
| |
| |
| - (id) nextNode |
| { |
| if (dirty || (cursor >= [self size] && [self size] == 1)) |
| return [treeAdaptor dupNode:[self _next]]; |
| else |
| return [self _next]; |
| } |
| |
| - (id) dup:(id)element |
| { |
| return [treeAdaptor dupTree:element]; |
| } |
| |
| @end |
