binaryoperatorast.java

Java写的词法/语法分析器。可生成JAVA语言或者是C++的词法和语法分析器。并可产生语法分析树和对该树进行遍历

public abstract class BinaryOperatorAST extends CalcAST {
    public CalcAST left() {
	return (CalcAST)getFirstChild();
    }

    public CalcAST right() {
	CalcAST t = left();
	if ( t==null ) return null;
	return (CalcAST)t.getNextSibling();
    }
}