methoddeclaratornode.java

是有关解释器的.用JAVA编写.可以解释一般的JAVA程序.

class MethodDeclaratorNode extends ExecutableNode
{
	ResultTypeNode vResultTypeNode;
	IdentifierNode vIdentifierNode;
	FormalParametersNode vFormalParametersNode;
	
	static MethodDeclaratorNode parserMethodDeclarator(Environment env,Scanner s) throws ParserException, ScannerException
	{
		ResultTypeNode tmpResultTypeNode;
		IdentifierNode tmpIdentifierNode;
		FormalParametersNode tmpFormalParametersNode;
		
		tmpResultTypeNode= ResultTypeNode.parserResultType(env,s);		
		tmpIdentifierNode= IdentifierNode.parserIndentifier(env,s);
		tmpFormalParametersNode= FormalParametersNode.parserFormalParameters(env,s);		
				
		return new MethodDeclaratorNode(tmpResultTypeNode,tmpIdentifierNode,tmpFormalParametersNode);
	}
	String mGetMethodName()
	{
		return vIdentifierNode.vName;
	}
	MethodDeclaratorNode()
	{
		vResultTypeNode= null;
		vFormalParametersNode= null;		
	}
	MethodDeclaratorNode(ResultTypeNode aResultTypeNode,IdentifierNode aIdentifierNode,FormalParametersNode aFormalParametersNode)
	{
		vResultTypeNode= aResultTypeNode;
		vIdentifierNode= aIdentifierNode;
		vFormalParametersNode= aFormalParametersNode;
	}
	String format(int indent)
	{
		String str= vResultTypeNode.format(indent) + " " + vIdentifierNode.format(indent);
		if(vFormalParametersNode!=null)
			str+= vFormalParametersNode.format(indent);
		else str+="()";
		return str;
	}
	Environment run(Environment env) throws InterpreterException
	{
		return env;
	}
	boolean typeCheck(Environment env) throws InterpreterException
	{			
		if(PrimitiveSelectorNode.mIsPrimitiveSelector(mGetMethodName()))
			ProgramNode.mTypeCheckError("Method Name: " + mGetMethodName() + " is invalid.");
		return vFormalParametersNode.typeCheck(env);
	}
}