[Issue 12313] Unneeded stack temporaries created by tuple foreach

[d-bugmail at puremagic.com]

https://d.puremagic.com/issues/show_bug.cgi?id=12313


Vladimir Panteleev <thecybershadow at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |thecybershadow at gmail.com


--- Comment #3 from Vladimir Panteleev <thecybershadow at gmail.com> 2014-03-07 17:54:23 EET ---
(In reply to comment #2)
> It does not also make any sense from language semantics point of view as
> a.tupleof is effectively tuple of variable aliases. And there is no such thing
> as `ref alias`.
> 
> Sounds more like a hack to fix another hack.

I see it more like the foreach body being like a function (whose body is
implicitly inlined). In this context, "ref" works out fine. Since .tupleof only
enumerates fields, and not functions, each member can be mapped to a concrete
value (and thus can work with "ref").

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