DMD 1.031 and 2.015 releases
Robert Fraser
fraserofthenight at gmail.com
Wed Jun 18 17:06:43 PDT 2008
Walter Bright Wrote:
> Robert Fraser wrote:
> > Out of curiosity, why doesn't return type deduction work for all
> > functions (is this panned?). It seems to be possible to do:
> >
> > auto foo()()
> > {
> > return 10;
> > }
> >
> > but not:
> >
> > auto foo()
> > {
> > return 10;
> > }
>
> Good question!
>
> Because deducing the return type requires semantic analysis, and for
> functions that introduces the old forward reference chicken-and-egg
> problem. This doesn't happen with function templates, because semantic
> analysis of them doesn't happen until later.
(Apologies for the web interface)
Any way to rewrite them as no-parameter templates automatically if possible and
issue a sensible compiler message if they can't be (i.e. a virtual function).
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