Around 20 years ago the GCC compiler had what was called "named return
values". It got taken away because compiler optimizations could generate
equivalent code.

But I just found one case where this can't be true and I wanted to share
my workaround with the community for potential discussion. Suppose you
have a std::wstring wrapper:

#include <string>


namespace personal

{

struct string : std::wstring

{

     typedef std::string base;

[...]


     wchar_t const * get(std::wstring && r = std::wstring())
     {
         r = std::wstring(base::begin(), base::end());

         return r.c_str();
     }
};

}

personal::string s = "Hello world";

cout << s.get() << endl; // will be just fine


In the aforementioned case, I am creating the return value before the
function get() is called; this way the returned c_str() will live during
the duration of the temporary variable created thus will not get
destroyed within the function.

Anyway I just thought this might be useful to know.


Regards,

-- 
*Phil Bouchard*
Founder & CTO
C.: (819) 328-4743
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