Re: [Boost-users] Runtime identity

30 Nov 2010

      AMDG

On 11/30/2010 7:06 AM, Robert Jones wrote:
...
I'm not sure if this is a stupid question, but is there a runtime equivalent
of boost.mpl's identity
metafunction?
Something that just returns it's single argument, eg.,
template<typename T>  T identity( T t ) { return t; }
I think it's trivially simple to write, but I wonder if it already exists in
Boost or
indeed the STL?
(I need this because I need to pass a function object which simply returns
an
object I already have - maybe I've missed a more obvious method?)
boost::lambda::_1?

In Christ,
Steven Watanabe