antlrparser.m

ANTLR(ANother Tool for Language Recognition)它是这样的一种工具

// [The "BSD licence"]
// Copyright (c) 2006 Kay Roepke
// 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 "ANTLRParser.h"


@implementation ANTLRParser

- (id) initWithTokenStream:(id<ANTLRTokenStream>)theStream
{
	if ((self = [super init])) {
		[super reset];
		[self setInput:theStream];
	}
	return self;
}

- (void) dealloc
{
	[self setInput:nil];
	[super dealloc];
}

//---------------------------------------------------------- 
//  input 
//---------------------------------------------------------- 
- (id<ANTLRTokenStream>) input
{
    return input; 
}

- (void) setInput: (id<ANTLRTokenStream>) anInput
{
    if (input != anInput) {
        [anInput retain];
        [input release];
        input = anInput;
    }
}

@end