Subject: [Boost-users] identity function
From: Krzysztof Żelechowski (giecrilj_at_[hidden])
Date: 2011-10-01 08:57:27
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