constant.java

用java实现的编译器. 包括语法分析

package inter;
import lexer.*;
import symbols.*;
public class Constant extends Expr {
	public Constant(Token tok, Type p) { super(tok, p);}
	public Constant(int i) { super(new Num(i), Type.Int);}
	public static final Constant
		True = new Constant(Word.True, Type.Bool),
		False = new Constant(Word.False, Type.Bool);
	public void jumping(int t, int f) {
		if ( this == True && t != 0) emit("goto L" + t);
		else if ( this == False && f != 0) emit("goto L" + f);
	}
}