On Wed, 14 Jan 2026 at 13:47, Frederick Virchanza Gotham via
Std-Proposals <std-proposals_at_[hidden]> wrote:
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> On Wednesday, January 14, 2026, Thiago Macieira via Std-Proposals <std-proposals_at_[hidden]> wrote:
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>> On Tuesday, 13 January 2026 15:50:02 Pacific Standard Time Frederick Virchanza
>> Gotham via Std-Proposals wrote:
>> > No actually it's a bit longer than that:
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>> > if ( decltype(auto) x = SomeFunction() ) return
>> > !static_cast<decltype(x)>(x);
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>> Why are you casting x to x's type?
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>> And how often do you need to do that anyway?
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> Just in case SomeFunction returns an Rvalue reference

So what if it does? If your function returns an rvalue reference or it
returns a decltype(auto), that just works,
and if your function returns a prvalue, that also works without the
cast, the returned value is subject to auto-elision
and auto-move.