This commit expands on 5eef07d232 by
automatically trying to coerce Type::String PropertyNames into numbers
when a caller checks if the PropertyName is_number/is_string.
This has several benefits:
- We no longer have to duplicate the number coercion code to every
function that accepts a PropertyNumber. (Or more likely, forget to.)
- This keeps the lazy nature of only doing the coercion when and if
there is a semantic difference to the different PropertyName types,
which means this shouldnt cause any performance drop.
- Since this coercion changes the state of the PropertyName itself the
result is essentially cached and can speed up any repeat uses of the
same PropertyName instance.
b9d9187feb