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      1 //
      2 //  ANTLRRewriteRuleTokenStream.m
      3 //  ANTLR
      4 //
      5 //  Created by Kay Rpke on 7/16/07.
      6 // [The "BSD licence"]
      7 // Copyright (c) 2006-2007 Kay Roepke 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 "ANTLRRewriteRuleTokenStream.h"
     33 #import "ANTLRRuntimeException.h"
     34 #import "ANTLRHashMap.h"
     35 #import "ANTLRMapElement.h"
     36 
     37 @implementation ANTLRRewriteRuleTokenStream
     38 
     39 + (id) newANTLRRewriteRuleTokenStream:(id<ANTLRTreeAdaptor>)anAdaptor
     40                           description:(NSString *)elementDescription
     41 {
     42     return [[ANTLRRewriteRuleTokenStream alloc] initWithTreeAdaptor:anAdaptor
     43                                                         description:elementDescription];
     44 }
     45 
     46 /** Create a stream with one element */
     47 + (id) newANTLRRewriteRuleTokenStream:(id<ANTLRTreeAdaptor>)adaptor
     48                           description:(NSString *)elementDescription
     49                               element:(id) oneElement
     50 {
     51     return [[ANTLRRewriteRuleTokenStream alloc] initWithTreeAdaptor:adaptor
     52                                                         description:elementDescription
     53                                                             element:oneElement];
     54 }
     55 
     56 /** Create a stream, but feed off an existing list */
     57 + (id) newANTLRRewriteRuleTokenStream:(id<ANTLRTreeAdaptor>)adaptor
     58                           description:(NSString *)elementDescription
     59                              elements:(AMutableArray *)elements
     60 {
     61     return [[ANTLRRewriteRuleTokenStream alloc] initWithTreeAdaptor:adaptor
     62                                                         description:elementDescription
     63                                                            elements:elements];
     64 }
     65 
     66 - (id) init
     67 {
     68     if ((self = [super init]) != nil ) {
     69     }
     70     return self;
     71 }
     72 
     73 - (id) initWithTreeAdaptor:(id<ANTLRTreeAdaptor>)anAdaptor
     74                description:(NSString *)aDescription
     75 {
     76     if ((self = [super initWithTreeAdaptor:anAdaptor
     77                                description:aDescription]) != nil ) {
     78     }
     79     return self;
     80 }
     81 
     82 - (id) initWithTreeAdaptor:(id<ANTLRTreeAdaptor>)anAdaptor
     83                description:(NSString *)aDescription
     84                    element:(id)anElement
     85 {
     86     if ((self = [super initWithTreeAdaptor:anAdaptor
     87                                description:aDescription
     88                                    element:anElement]) != nil ) {
     89     }
     90     return self;
     91 }
     92 
     93 - (id) initWithTreeAdaptor:(id<ANTLRTreeAdaptor>)anAdaptor
     94                description:(NSString *)aDescription
     95                   elements:(AMutableArray *)elementList
     96 {
     97     if ((self = [super initWithTreeAdaptor:anAdaptor
     98                                description:aDescription
     99                                   elements:elementList]) != nil ) {
    100     }
    101     return self;
    102 }
    103 
    104 - (id<ANTLRBaseTree>) nextNode
    105 {
    106     id<ANTLRToken> t = [self _next];
    107     return [treeAdaptor create:t];
    108 }
    109 
    110 - (id) nextToken
    111 {
    112     return [self _next];
    113 }
    114 
    115 /** Don't convert to a tree unless they explicitly call nextTree.
    116  *  This way we can do hetero tree nodes in rewrite.
    117  */
    118 - (id<ANTLRBaseTree>) toTree:(id<ANTLRToken>)element
    119 {
    120     return element;
    121 }
    122 
    123 - (id) copyElement:(id)element
    124 {
    125     @throw [ANTLRRuntimeException newException:@"copy can't be called for a token stream."];
    126 }
    127 
    128 @end
    129