function overload on full signature?

[Rob T]

On Wednesday, 14 November 2012 at 07:26:44 UTC, Tove wrote:
> it would be a very useful feature to allow overload on void and 
> 1 other type... as sometimes the return is very expensive to 
> calculate... I have seen this trick used by compiler build-in 
> functions.
>
> struct A
> {
>   int i;
>   string s;
>
>   alias i this;
>   alias s this;
> }
>
> but... 2 alias this are not currently allowed.

Was the single conversion limitation specified by design, or do 
we have room to expand it to allow for multiple conversions?

In C++ I used multiple conversions for a variant class and it 
worked like a charm. The alternative was to manually specify a 
named function based on the type to return, which is not as fun 
to work with.

--rt