RE: [Boost-Users] NRVO (was Re: "Correct" way to return empty shared_ptr?)

From: dick.bridges_at_[hidden]
Date: 2003-04-25 14:04:27

return shared_ptr<int>();

works with VC6.0 but elicits the [AFAICT] uninformative <emsg>parse error
before `;'</emsg> from gcc version 2.96 20000731 (Red Hat Linux 7.3
2.96-110).

Drat!

                                                                                                                                      
                      "Duane Murphy"                                                                                                  
                      <duanemurphy_at_mac         To:      "Boost Users" <Boost-Users_at_[hidden]>                                   
                      .com>                    cc:                                                                                    
                                               Subject: RE: [Boost-Users] NRVO (was Re: "Correct" way to return empty shared_ptr?)    
                      04/24/2003 09:40                                                                                                
                      AM                                                                                                              
                      Please respond                                                                                                  
                      to Boost-Users                                                                                                  
                                                                                                                                      
                                                                                                                                      

--- At Thu, 24 Apr 2003 16:56:40 +0100, Ben Hutchings wrote:

<snip>

shared_ptr<int> maybe_get_a_pointer()
{
      return shared_ptr<int>();
}

is perfectly reasonable and can also be optimized.

Is there more recent and complete discussion concerning this
optimization? Is naming actually required?

 ...Duane

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