public class Return extends Op {
final Expr e;
public Return() { this(VOID_EXPR); }
- public Return(Expr e) { this.e = e; }
+ public Return(Expr e) {
+ this.e = e;
+ if(Type.unify(method.getReturnType(),e.getType()) != method.getReturnType())
+ throw new IllegalArgumentException("type mismatch");
+ }
public String toString() { return e.getType() == Type.VOID ? "return" : ("return "+e.toString()); }
}
private final Object o;
public Constant(int i) { this(new Integer(i)); }
public Constant(Object o) { this.o = o; }
- public String _toString() { return o instanceof String ? "\"" + o + "\"" : o.toString(); }
+ public String _toString() { return o == null ? "null" : o instanceof String ? "\"" + o + "\"" : o.toString(); }
public Type getType() {
+ if (o == null) return Type.NULL;
if (o instanceof Byte) return Type.BYTE;
if (o instanceof Short) return Type.SHORT;
if (o instanceof Character) return Type.CHAR;