On Monday, 20 April 2015 at 20:22:40 UTC, Jonathan M Davis wrote:
There may be languages out there which take the the return type
into account
when overloading, but I've never seen one.
Rust does, as far as I know.
I don't think that the ambiguities are an insurmountable
obstacle. It's probably sufficient to error out when a call is
ambiguous in its context, as can already happen during
overloading.
Also note that, as Ali pointed out, with multiple alias this we
will be able to implement this indirectly. Which means that the
compiler needs to deal with exactly the same ambiguities anyway.
Might as well just take the return type into consideration
directly.
