numberliteralnode.java

来自「是有关解释器的.用JAVA编写.可以解释一般的JAVA程序.」· Java 代码 · 共 39 行

class NumberLiteralNode extends EvaluatableNode
{
	int vInt;
	
	static NumberLiteralNode parserNumberLiteral(Environment env, Scanner s) throws ParserException, ScannerException
	{
		int tmp=0;
		
		if(isNumberLiteral(s))
		{
			tmp= ((NumberLiteralToken)s.token()).content();
			matchNumberLiteral(s);
		}
		else parserError(s.token(),"NumberLiteral Expected!!!");
		
		return new NumberLiteralNode(tmp);		
	}
	static boolean mIsNumberLiteral(Scanner s) throws ScannerException
	{
		return isNumberLiteral(s);
	}
	NumberLiteralNode(int aInt)
	{
		vInt= aInt;
	}
	NumberLiteralNode()
	{
		vInt= 0;
	}
	String format(int indent)
	{
		return ""+vInt;
	}
	Value evaluate(Environment env) throws InterpreterException
	{		
		return new NumberValue(vInt);
	}
	//type checker returns true
}