@Override
public Value apply(Spreadsheet s, List<Expression> args) {
Value a = args.get(0).evaluate(s).resolve(s);
Value b = args.get(1).evaluate(s).resolve(s);
switch (op) {
case less:
return a.compareTo(b) < 0 ? TrueValue.get() : null;
case lesseq:
return a.compareTo(b) <= 0 ? TrueValue.get() : null;
case eq:
return a.compareTo(b) == 0 ? TrueValue.get() : null;
case grtr:
return a.compareTo(b) > 0 ? TrueValue.get() : null;
case grtreq:
return a.compareTo(b) >= 0 ? TrueValue.get() : null;
case noteq:
return a.compareTo(b) != 0 ? TrueValue.get() : null;
default:
return null;
}
}
@Override
public Value apply(Spreadsheet s, List<Expression> args) {
return args.get(0).evaluate(s).resolve(s) == null ? TrueValue.get() : null;
}