W dniu 1 października 2011 14:57 użytkownik Krzysztof Żelechowski <giecrilj@stegny.2a.pl> napisał:

I use the following function on a regular basis:

template < class P_T > P_T const &same (P_T const &p) { return p; }

I use it for two purposes:

 1. to pass an identity function to an API that expects a unary function,
 2. to help the compiler identify the right chain of type conversions.

The standard uses static_cast for (2), which could be used but it disables
some compile-time verification so I would rather not use static_cast when
not absolutely necessary.

I have been unable to find a corresponding feature in Boost (although the
value factory comes close).  Do you think adding such a function to Boost
utilities would be worthwhile?

Chris