symboltableparser.m

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

// $ANTLR start method
// /Users/kroepke/Projects/antlr3/code/antlr/main/lib/ObjC/Framework/examples/scopes/SymbolTable.g:41:1: method : 'method' ID '(' ')' block ;
- (void) method
{
    @try {
        // /Users/kroepke/Projects/antlr3/code/antlr/main/lib/ObjC/Framework/examples/scopes/SymbolTable.g:42:9: ( 'method' ID '(' ')' block ) // ruleBlockSingleAlt
        // /Users/kroepke/Projects/antlr3/code/antlr/main/lib/ObjC/Framework/examples/scopes/SymbolTable.g:42:9: 'method' ID '(' ')' block // alt
        {
        [self match:input tokenType:7 follow:FOLLOW_7_in_method110]; 
        [self match:input tokenType:SymbolTableParser_ID follow:FOLLOW_SymbolTableParser_ID_in_method112]; 
        [self match:input tokenType:8 follow:FOLLOW_8_in_method114]; 
        [self match:input tokenType:9 follow:FOLLOW_9_in_method116]; 
        [following addObject:FOLLOW_block_in_method118];
        [self block];
        [following removeLastObject];



        }

    }
	@catch (ANTLRRecognitionException *re) {
		[self reportError:re];
		[self recover:input exception:re];
	}
	@finally {
		// token labels
		// token+rule list labels
		// rule labels
		// rule refs in alts with rewrites

	}
	return ;
}
// $ANTLR end method

// $ANTLR start block
// /Users/kroepke/Projects/antlr3/code/antlr/main/lib/ObjC/Framework/examples/scopes/SymbolTable.g:45:1: block : '{' ( decl )* ( stat )* '}' ;
- (void) block
{
    [SymbolTableParser_Symbols_stack addObject:[[[SymbolTableParserSymbolsScope alloc] init] autorelease]];


        level++;
        [[SymbolTableParser_Symbols_stack lastObject] setValue: [[NSMutableArray alloc] init] forKey:@"names"];

    @try {
        // /Users/kroepke/Projects/antlr3/code/antlr/main/lib/ObjC/Framework/examples/scopes/SymbolTable.g:51:9: ( '{' ( decl )* ( stat )* '}' ) // ruleBlockSingleAlt
        // /Users/kroepke/Projects/antlr3/code/antlr/main/lib/ObjC/Framework/examples/scopes/SymbolTable.g:51:9: '{' ( decl )* ( stat )* '}' // alt
        {
        [self match:input tokenType:10 follow:FOLLOW_10_in_block147]; 
        do {
            int alt3=2;
            {
            	int LA3_0 = [input LA:1];
            	if ( LA3_0==14 ) {
            		alt3 = 1;
            	}

            }
            switch (alt3) {
        	case 1 :
        	    // /Users/kroepke/Projects/antlr3/code/antlr/main/lib/ObjC/Framework/examples/scopes/SymbolTable.g:51:14: decl // alt
        	    {
        	    [following addObject:FOLLOW_decl_in_block150];
        	    [self decl];
        	    [following removeLastObject];



        	    }
        	    break;

        	default :
        	    goto loop3;
            }
        } while (YES); loop3: ;

        do {
            int alt4=2;
            {
            	int LA4_0 = [input LA:1];
            	if ( LA4_0==SymbolTableParser_ID||LA4_0==10 ) {
            		alt4 = 1;
            	}

            }
            switch (alt4) {
        	case 1 :
        	    // /Users/kroepke/Projects/antlr3/code/antlr/main/lib/ObjC/Framework/examples/scopes/SymbolTable.g:51:22: stat // alt
        	    {
        	    [following addObject:FOLLOW_stat_in_block155];
        	    [self stat];
        	    [following removeLastObject];



        	    }
        	    break;

        	default :
        	    goto loop4;
            }
        } while (YES); loop4: ;

        [self match:input tokenType:11 follow:FOLLOW_11_in_block159]; 

                NSLog(@"level %d symbols: %@", level, [[SymbolTableParser_Symbols_stack lastObject] valueForKey:@"names"]);
                level--;
                

        }

    }
	@catch (ANTLRRecognitionException *re) {
		[self reportError:re];
		[self recover:input exception:re];
	}
	@finally {
		// token labels
		// token+rule list labels
		// rule labels
		// rule refs in alts with rewrites

		[SymbolTableParser_Symbols_stack removeLastObject];

	}
	return ;
}
// $ANTLR end block

// $ANTLR start stat
// /Users/kroepke/Projects/antlr3/code/antlr/main/lib/ObjC/Framework/examples/scopes/SymbolTable.g:58:1: stat : ( ID '=' INT ';' | block );
- (void) stat
{
    @try {
        // /Users/kroepke/Projects/antlr3/code/antlr/main/lib/ObjC/Framework/examples/scopes/SymbolTable.g:58:9: ( ID '=' INT ';' | block ) //ruleblock
        int alt5=2;
        {
        	int LA5_0 = [input LA:1];
        	if ( LA5_0==SymbolTableParser_ID ) {
        		alt5 = 1;
        	}
        	else if ( LA5_0==10 ) {
        		alt5 = 2;
        	}
        else {
            ANTLRNoViableAltException *nvae = [ANTLRNoViableAltException exceptionWithDecision:5 state:0 stream:input];
        	@throw nvae;
        	}
        }
        switch (alt5) {
        	case 1 :
        	    // /Users/kroepke/Projects/antlr3/code/antlr/main/lib/ObjC/Framework/examples/scopes/SymbolTable.g:58:9: ID '=' INT ';' // alt
        	    {
        	    [self match:input tokenType:SymbolTableParser_ID follow:FOLLOW_SymbolTableParser_ID_in_stat183]; 
        	    [self match:input tokenType:12 follow:FOLLOW_12_in_stat185]; 
        	    [self match:input tokenType:SymbolTableParser_INT follow:FOLLOW_SymbolTableParser_INT_in_stat187]; 
        	    [self match:input tokenType:13 follow:FOLLOW_13_in_stat189]; 

        	    }
        	    break;
        	case 2 :
        	    // /Users/kroepke/Projects/antlr3/code/antlr/main/lib/ObjC/Framework/examples/scopes/SymbolTable.g:59:9: block // alt
        	    {
        	    [following addObject:FOLLOW_block_in_stat199];
        	    [self block];
        	    [following removeLastObject];



        	    }
        	    break;

        }
    }
	@catch (ANTLRRecognitionException *re) {
		[self reportError:re];
		[self recover:input exception:re];
	}
	@finally {
		// token labels
		// token+rule list labels
		// rule labels
		// rule refs in alts with rewrites

	}
	return ;
}
// $ANTLR end stat

// $ANTLR start decl
// /Users/kroepke/Projects/antlr3/code/antlr/main/lib/ObjC/Framework/examples/scopes/SymbolTable.g:62:1: decl : 'int' ID ';' ;
- (void) decl
{
    ANTLRToken * _ID1 = nil;

    @try {
        // /Users/kroepke/Projects/antlr3/code/antlr/main/lib/ObjC/Framework/examples/scopes/SymbolTable.g:62:9: ( 'int' ID ';' ) // ruleBlockSingleAlt
        // /Users/kroepke/Projects/antlr3/code/antlr/main/lib/ObjC/Framework/examples/scopes/SymbolTable.g:62:9: 'int' ID ';' // alt
        {
        [self match:input tokenType:14 follow:FOLLOW_14_in_decl213]; 
        _ID1=(ANTLRToken *)[input LT:1];
        [_ID1 retain];
        [self match:input tokenType:SymbolTableParser_ID follow:FOLLOW_SymbolTableParser_ID_in_decl215]; 
        [self match:input tokenType:13 follow:FOLLOW_13_in_decl217]; 
        [[[SymbolTableParser_Symbols_stack lastObject] valueForKey:@"names"] addObject:_ID1];

        }

    }
	@catch (ANTLRRecognitionException *re) {
		[self reportError:re];
		[self recover:input exception:re];
	}
	@finally {
		// token labels
		[_ID1 release];
		// token+rule list labels
		// rule labels
		// rule refs in alts with rewrites

	}
	return ;
}
// $ANTLR end decl



@end