/** f0 -> "HALLOCATE" f1 -> Exp() */
public PGValue visit(HAllocate n, Node argu) {
int old_hp = HP;
PGValue exp;
n.f0.accept(this, argu);
exp = n.f1.accept(this, argu);
HP = HP + exp.GetVal();
return new Const(old_hp);
}
/** f0 -> "CJUMP" f1 -> Exp() f2 -> Label() */
public PGValue visit(CJumpStmt n, Node argu) {
PGValue p = n.f1.accept(this, argu);
int cond = 0;
if (p == null) return null;
else cond = p.GetVal();
if (cond == 1) return null;
String l_name = (n.f2.accept(this, argu)).GetLabel();
label_name = l_name;
start = false;
stop = false;
// System.out.println("CJUMP " + l_name);
argu.accept(this, argu);
stop = true;
start = true;
return null;
}
/** f0 -> "PRINT" f1 -> Exp() */
public PGValue visit(PrintStmt n, Node argu) {
PGValue _ret = n.f1.accept(this, argu);
System.out.println(_ret.GetVal());
return null;
}
