rel.java

用java实现的编译器. 包括语法分析

package inter;
import lexer.*;
import symbols.*;
public class Rel extends Logical {
	public Rel(Token tok, Expr x1, Expr x2) { 
		super(tok, x1, x2);
	}
	public Type check(Type p1, Type p2) {
		if(p1 instanceof Array || p2 instanceof Array)
			return null;
		else if(p1 == p2)
			return Type.Bool;
		else return null;
	}
	public void jumping(int t, int f) {
		Expr a = expr1.reduce();
		Expr b = expr2.reduce();
		String test = a.toString() + " " + op.toString() + " " + b.toString();
		emitjumps(test, t, f);
	}
	
}