Subject: Re: [boost] Temporary objects
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2009-11-02 12:52:35
AMDG
DE wrote:
> on 31.10.2009 at 17:12
> Mathias Gaunard wrote :
>
>> NRVO doesn't involve the assignment operator at all.
>> The optimization also doesn't even require to know what the definition
>> of the copy constructor is, so static analysis of its definition is
>> irrelevant.
>>
> i mean that in an example like
>
> type foo(const type &to_be_processed)
> {
> type ret;
> //processing
> return ret;
> }
>
> semantics of the copy constructor does matter
> here nrvo likely not to take place (actually it should NOT take place)
>
This is exactly the case where NRVO should happen.
(NRVO stands for named return value optimization as
opposed to RVO which is for temporaries)
In Christ,
Steven Watanabe