@Override
public TLValue evaluate() {
TLValue a = lhs.evaluate();
TLValue b = rhs.evaluate();
// number + number
if (a.isNumber() && b.isNumber()) {
return new TLValue(a.asDouble() + b.asDouble());
}
// list + any
if (a.isList()) {
List<TLValue> list = a.asList();
list.add(b);
return new TLValue(list);
}
// string + any
if (a.isString()) {
return new TLValue(a.asString() + "" + b.toString());
}
// any + string
if (b.isString()) {
return new TLValue(a.toString() + "" + b.asString());
}
throw new RuntimeException("illegal expression: " + this);
}
@Override
public TLValue evaluate() {
TLValue a = lhs.evaluate();
TLValue b = rhs.evaluate();
if (a.isNumber() && b.isNumber()) {
return new TLValue(a.asDouble() < b.asDouble());
}
if (a.isString() && b.isString()) {
return new TLValue(a.asString().compareTo(b.asString()) < -1);
}
throw new RuntimeException("illegal expression: " + this);
}
