Re: [boost] Temporary objects

2 Nov 2009


      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