codegentreewalker.java

antlr最新版本V3源代码

			default:
			{
				throw new NoViableAltException(_t);
			}
			}
		}
		catch (RecognitionException ex) {
			reportError(ex);
			if (_t!=null) {_t = _t.getNextSibling();}
		}
		_retTree = _t;
		return code;
	}
	
	public final StringTemplate  tree(AST _t) throws RecognitionException {
		StringTemplate code=templates.getInstanceOf("tree");
		
		GrammarAST tree_AST_in = (_t == ASTNULL) ? null : (GrammarAST)_t;
		
		StringTemplate el=null, act=null;
		GrammarAST elAST=null, actAST=null;
		NFAState afterDOWN = (NFAState)tree_AST_in.NFATreeDownState.transition(0).target;
		LookaheadSet s = grammar.LOOK(afterDOWN);
		if ( s.member(Label.UP) ) {
			// nullable child list if we can see the UP as the next token
			// we need an "if ( input.LA(1)==Token.DOWN )" gate around
			// the child list.
			code.setAttribute("nullableChildList", "true");
		}
		
		
		try {      // for error handling
			AST __t77 = _t;
			GrammarAST tmp50_AST_in = (GrammarAST)_t;
			match(_t,TREE_BEGIN);
			_t = _t.getFirstChild();
			elAST=(GrammarAST)_t;
			el=element(_t,null,null);
			_t = _retTree;
			
			code.setAttribute("root.{el,line,pos}",
										  el,
										  Utils.integer(elAST.getLine()),
										  Utils.integer(elAST.getColumn())
										  );
			
			{
			_loop79:
			do {
				if (_t==null) _t=ASTNULL;
				if ((_t.getType()==ACTION)) {
					actAST=(GrammarAST)_t;
					act=element_action(_t);
					_t = _retTree;
					
					code.setAttribute("actionsAfterRoot.{el,line,pos}",
					act,
					Utils.integer(actAST.getLine()),
					Utils.integer(actAST.getColumn())
					);
					
				}
				else {
					break _loop79;
				}
				
			} while (true);
			}
			{
			_loop81:
			do {
				if (_t==null) _t=ASTNULL;
				if ((_t.getType()==BLOCK||_t.getType()==OPTIONAL||_t.getType()==CLOSURE||_t.getType()==POSITIVE_CLOSURE||_t.getType()==CHAR_RANGE||_t.getType()==EPSILON||_t.getType()==GATED_SEMPRED||_t.getType()==SYN_SEMPRED||_t.getType()==BACKTRACK_SEMPRED||_t.getType()==ACTION||_t.getType()==ASSIGN||_t.getType()==STRING_LITERAL||_t.getType()==CHAR_LITERAL||_t.getType()==TOKEN_REF||_t.getType()==BANG||_t.getType()==PLUS_ASSIGN||_t.getType()==SEMPRED||_t.getType()==ROOT||_t.getType()==RULE_REF||_t.getType()==NOT||_t.getType()==TREE_BEGIN||_t.getType()==WILDCARD)) {
					elAST=(GrammarAST)_t;
					el=element(_t,null,null);
					_t = _retTree;
					
								 code.setAttribute("children.{el,line,pos}",
												  el,
												  Utils.integer(elAST.getLine()),
												  Utils.integer(elAST.getColumn())
												  );
								
				}
				else {
					break _loop81;
				}
				
			} while (true);
			}
			_t = __t77;
			_t = _t.getNextSibling();
		}
		catch (RecognitionException ex) {
			reportError(ex);
			if (_t!=null) {_t = _t.getNextSibling();}
		}
		_retTree = _t;
		return code;
	}
	
	public final StringTemplate  element_action(AST _t) throws RecognitionException {
		StringTemplate code=null;
		
		GrammarAST element_action_AST_in = (_t == ASTNULL) ? null : (GrammarAST)_t;
		GrammarAST act = null;
		
		try {      // for error handling
			act = (GrammarAST)_t;
			match(_t,ACTION);
			_t = _t.getNextSibling();
			
			code = templates.getInstanceOf("execAction");
			code.setAttribute("action", generator.translateAction(currentRuleName,act));
			
		}
		catch (RecognitionException ex) {
			reportError(ex);
			if (_t!=null) {_t = _t.getNextSibling();}
		}
		_retTree = _t;
		return code;
	}
	
	public final StringTemplate  set(AST _t,
		GrammarAST label, GrammarAST astSuffix
	) throws RecognitionException {
		StringTemplate code=null;
		
		GrammarAST set_AST_in = (_t == ASTNULL) ? null : (GrammarAST)_t;
		GrammarAST s = null;
		
		String labelText=null;
		if ( label!=null ) {
		labelText = label.getText();
		}
		
		
		try {      // for error handling
			s = (GrammarAST)_t;
			match(_t,BLOCK);
			_t = _t.getNextSibling();
			
			code = getTokenElementST("matchSet", "set", s, astSuffix, labelText);
			int i = ((TokenWithIndex)s.getToken()).getIndex();
					code.setAttribute("elementIndex", i);
					if ( grammar.type!=Grammar.LEXER ) {
						generator.generateLocalFOLLOW(s,"set",currentRuleName,i);
			}
			code.setAttribute("s", generator.genSetExpr(templates,s.getSetValue(),1,false));
			
		}
		catch (RecognitionException ex) {
			reportError(ex);
			if (_t!=null) {_t = _t.getNextSibling();}
		}
		_retTree = _t;
		return code;
	}
	
	public final void ast_suffix(AST _t) throws RecognitionException {
		
		GrammarAST ast_suffix_AST_in = (_t == ASTNULL) ? null : (GrammarAST)_t;
		
		try {      // for error handling
			if (_t==null) _t=ASTNULL;
			switch ( _t.getType()) {
			case ROOT:
			{
				GrammarAST tmp51_AST_in = (GrammarAST)_t;
				match(_t,ROOT);
				_t = _t.getNextSibling();
				break;
			}
			case BANG:
			{
				GrammarAST tmp52_AST_in = (GrammarAST)_t;
				match(_t,BANG);
				_t = _t.getNextSibling();
				break;
			}
			default:
			{
				throw new NoViableAltException(_t);
			}
			}
		}
		catch (RecognitionException ex) {
			reportError(ex);
			if (_t!=null) {_t = _t.getNextSibling();}
		}
		_retTree = _t;
	}
	
	public final void setElement(AST _t) throws RecognitionException {
		
		GrammarAST setElement_AST_in = (_t == ASTNULL) ? null : (GrammarAST)_t;
		GrammarAST c = null;
		GrammarAST t = null;
		GrammarAST s = null;
		GrammarAST c1 = null;
		GrammarAST c2 = null;
		
		try {      // for error handling
			if (_t==null) _t=ASTNULL;
			switch ( _t.getType()) {
			case CHAR_LITERAL:
			{
				c = (GrammarAST)_t;
				match(_t,CHAR_LITERAL);
				_t = _t.getNextSibling();
				break;
			}
			case TOKEN_REF:
			{
				t = (GrammarAST)_t;
				match(_t,TOKEN_REF);
				_t = _t.getNextSibling();
				break;
			}
			case STRING_LITERAL:
			{
				s = (GrammarAST)_t;
				match(_t,STRING_LITERAL);
				_t = _t.getNextSibling();
				break;
			}
			case CHAR_RANGE:
			{
				AST __t90 = _t;
				GrammarAST tmp53_AST_in = (GrammarAST)_t;
				match(_t,CHAR_RANGE);
				_t = _t.getFirstChild();
				c1 = (GrammarAST)_t;
				match(_t,CHAR_LITERAL);
				_t = _t.getNextSibling();
				c2 = (GrammarAST)_t;
				match(_t,CHAR_LITERAL);
				_t = _t.getNextSibling();
				_t = __t90;
				_t = _t.getNextSibling();
				break;
			}
			default:
			{
				throw new NoViableAltException(_t);
			}
			}
		}
		catch (RecognitionException ex) {
			reportError(ex);
			if (_t!=null) {_t = _t.getNextSibling();}
		}
		_retTree = _t;
	}
	
	public final StringTemplate  rewrite_alternative(AST _t) throws RecognitionException {
		StringTemplate code=null;
		
		GrammarAST rewrite_alternative_AST_in = (_t == ASTNULL) ? null : (GrammarAST)_t;
		GrammarAST a = null;
		
		StringTemplate el,st;
		
		
		try {      // for error handling
			if (_t==null) _t=ASTNULL;
			if (((_t.getType()==ALT))&&(generator.grammar.buildAST())) {
				AST __t99 = _t;
				a = _t==ASTNULL ? null :(GrammarAST)_t;
				match(_t,ALT);
				_t = _t.getFirstChild();
				code=templates.getInstanceOf("rewriteElementList");
				{
				if (_t==null) _t=ASTNULL;
				switch ( _t.getType()) {
				case OPTIONAL:
				case CLOSURE:
				case POSITIVE_CLOSURE:
				case LABEL:
				case ACTION:
				case STRING_LITERAL:
				case CHAR_LITERAL:
				case TOKEN_REF:
				case RULE_REF:
				case TREE_BEGIN:
				{
					{
					int _cnt102=0;
					_loop102:
					do {
						if (_t==null) _t=ASTNULL;
						if ((_t.getType()==OPTIONAL||_t.getType()==CLOSURE||_t.getType()==POSITIVE_CLOSURE||_t.getType()==LABEL||_t.getType()==ACTION||_t.getType()==STRING_LITERAL||_t.getType()==CHAR_LITERAL||_t.getType()==TOKEN_REF||_t.getType()==RULE_REF||_t.getType()==TREE_BEGIN)) {
							GrammarAST elAST=(GrammarAST)_t;
							el=rewrite_element(_t);
							_t = _retTree;
							code.setAttribute("elements.{el,line,pos}",
												 					el,
														  		Utils.integer(elAST.getLine()),
														  		Utils.integer(elAST.getColumn())
												 					);
												
						}
						else {
							if ( _cnt102>=1 ) { break _loop102; } else {throw new NoViableAltException(_t);}
						}
						
						_cnt102++;
					} while (true);
					}
					break;
				}
				case EPSILON:
				{
					GrammarAST tmp54_AST_in = (GrammarAST)_t;
					match(_t,EPSILON);
					_t = _t.getNextSibling();
					code.setAttribute("elements.{el,line,pos}",
												   templates.getInstanceOf("rewriteEmptyAlt"),
												   Utils.integer(a.getLine()),
												   Utils.integer(a.getColumn())
										 			   );
									
					break;
				}
				default:
				{
					throw new NoViableAltException(_t);
				}
				}
				}
				GrammarAST tmp55_AST_in = (GrammarAST)_t;
				match(_t,EOA);
				_t = _t.getNextSibling();
				_t = __t99;
				_t = _t.getNextSibling();
			}
			else if (((_t.getType()==ALT||_t.getType()==TEMPLATE||_t.getType()==ACTION))&&(generator.grammar.buildTemplate())) {
				code=rewrite_template(_t);
				_t = _retTree;
			}
			else {
				throw new NoViableAltException(_t);
			}
			
		}
		catch (RecognitionException ex) {
			reportError(ex);
			if (_t!=null) {_t = _t.getNextSibling();}
		}
		_retTree = _t;
		return code;
	}
	
	public final StringTemplate  rewrite_block(AST _t,
		String blockTemplateName
	) throws RecognitionException {
		StringTemplate code=null;
		
		GrammarAST rewrite_block_AST_in = (_t == ASTNULL) ? null : (GrammarAST)_t;
		
		rewriteBlockNestingLevel++;
		code = templates.getInstanceOf(blockTemplateName);
		StringTemplate save_currentBlockST = currentBlockST;
		currentBlockST = code;
		code.setAttribute("rewriteBlockLevel", rewriteBlockNestingLevel);
		StringTemplate alt=null;
		
		
		try {      // for error handling
			AST __t97 = _t;
			GrammarAST tmp56_AST_in = (GrammarAST)_t;
			match(_t,BLOCK);
			_t = _t.getFirstChild();
			
			currentBlockST.setAttribute("referencedElementsDeep",
			getTokenTypesAsTargetLabels(tmp56_AST_in.rewriteRefsDeep));
			currentBlockST.setAttribute("referencedElements",
			getTokenTypesAsTargetLabels(tmp56_AST_in.rewriteRefsShallow));
			
			alt=rewrite_alternative(_t);
			_t = _retTree;
			GrammarAST tmp57_AST_in = (GrammarAST)_t;
			match(_t,EOB);
			_t = _t.getNextSibling();
			_t = __t97;
			_t = _t.getNextSibling();
			
				code.setAttribute("alt", alt);
				rewriteBlockNestingLevel--;
				currentBlockST = save_currentBlockST;
				
		}
		catch (RecognitionException ex) {
			reportError(ex);
			if (_t!=null) {_t = _t.getNextSibling();}
		}
		_retTree = _t;
		return code;
	}
	
	public final StringTemplate  rewrite_element(AST _t) throws RecognitionException {
		StringTemplate code=null;
		
		GrammarAST rewrite_element_AST_in = (_t == ASTNULL) ? null : (GrammarAST)_t;
		
		IntSet elements=null;
		GrammarAST ast = null;
		
		
		try {      // for error handling
			if (_t==null) _t=ASTNULL;
			switch ( _t.getType()) {
			case LABEL:
			case ACTION:
			case STRING_LITERAL:
			case CHAR_LITERAL:
			case TOKEN_REF:
			case RULE_REF:
			{
				code=rewrite_atom(_t,false);
				_t = _retTree;
				break;
			}
			case OPTIONAL:
			case CLOSURE:
			case POSITIVE_CLOSURE:
			{
				code=rewrite_ebnf(_t);
				_t = _retTree;
				break;
			}
			case TREE_BEGIN:
			{
				code=rewrite_tree(_t);
				_t = _retTree;
				break;
			}
			default:
			{
				throw new NoViableAltException(_t);
			}
			}
		}
		catch (RecognitionException ex) {
			reportError(ex);
			if (_t!=null) {_t = _t.getNextSibling();}
		}
		_retTree = _t;
		return code;
	}
	
	public final StringTemplate  rewrite_template(AST _t) throws RecognitionException {
		StringTemplate code=null;
		
		GrammarAST rewrite_template_AST_in = (_t == ASTNULL) ? null : (GrammarAST)_t;
		GrammarAST id = null;
		GrammarAST ind = null;
		GrammarAST arg = null;
		GrammarAST a = null;
		GrammarAST act = null;
		
		try {      // for error handling
			if (_t==null) _t=ASTNULL;
			switch ( _t.getType()) {
			case ALT:
			{
				AST __t117 = _t;
				GrammarAST tmp58_AST_in = (GrammarAST)_t;
				match(_t,ALT);
				_t = _t.getFirstChild();
				GrammarAST tmp59_AST_in = (GrammarAST)_t;
				match(_t,EPSILON);
				_t = _t.getNextSibling();
				GrammarAST tmp60_AST_in = (GrammarAST)_t;
				match(_t,EOA);
				_t = _t.getNextSibling();
				_t = __t117;
				_t = _t.getNextSibling();
				code=templates.getInstanceOf("rewriteEmptyTemplate");
				break;
			}
			case TEMPLATE:
			{
				AST __t118 = _t;
				GrammarAST tmp61_AST_in = (GrammarAST)_t;
				match(_t,TEMPLATE);
				_t = _t.getFirstChild();
				{
				if (_t==null) _t=ASTNULL;
				switch ( _t.getType()) {
				case ID:
				{
					id = (GrammarAST)_t;
					match(_t,ID);
					_t = _t.getNextSibling();
					break;
				}
				case ACTION:
				{
					ind = (GrammarAST)_t;
					match(_t,ACTION);
					_t = _t.getNextSibling();
					break;
				}
				default:
				{
					throw new NoViableAltException(_t);
				}
				}