rvalue references

[Manu]

scope ref a(scope ref int x) { return x; }
void b(scope ref int x);


On 24 April 2013 11:02, Diggory <diggsey at googlemail.com> wrote:

> On Wednesday, 24 April 2013 at 00:54:12 UTC, kenji hara wrote:
>
>> 2013/4/24 Manu <turkeyman at gmail.com>
>>
>>  "The r-value being passed is assigned to a stack allocated temporary,
>>> which has a lifetime that is identical to any other local variable, ie,
>>> the
>>> lifetime of the function in which it appears."
>>> There, I defined it.
>>>
>>>
>> Good definition. If add more,
>> "getting address of "scope" parameter would be disallowed, at least in
>> @safe code, because it would be regarded as the escape of stack allocated
>> temporary."
>>
>> Kenji Hara
>>
>
> Why does the temporary need to exist any longer than the current
> statement? (the current lifetime of temporaries are the statement or
> expression). Surely any longer is just wasting stack space.
>
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