Re: [Boost-users] Runtime identity

Subject: Re: [Boost-users] Runtime identity
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2010-11-30 10:20:17

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