Distinguish between Values containing integers and floats

[evroon]

Hi, I would like to be able to distinguish between a Value representing integers (ValueRepr::U64, ValueRepr::I64 etc.) and a Value representing a float (ValueRepr::F64).

Right now, there isn't a way to know whether a Value contains a float or int because

• The ValueRepr (Value.0) is private
• ValueKind considers ints and floats all to be a ValueKind::Number
• Converting a Value doesn't reveal this information either, it just converts floats to ints and vice versa:

assert_eq!(Value::from(0.0).as_i64().unwrap(), 0);
assert_eq!(f64::try_from(Value::from(0)).unwrap(), 0.0);

This distinction can be quite useful if you want to format a value differently based on whether it's an int or float for example.

I'm happy to create a PR for this if that helps but I'm not sure what the best approach is.

[evroon]

Thanks a lot!