Re: [boost] Temporary objects

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