Re: [Boost-users] [shared_ptr] Can the custom deleter be a simplefunction?

8 Nov 2011


      on Mon Nov 07 2011, "Peter Dimov"  wrote:
...
Robert Jones wrote:
...
Thanks Gents - The phrasing of my question was hopelessly lax: I
...
appreciate in the
general case why one might choose to use a functor rather than a
function as a callable
object, what I didn't grasp (and there may be nothing to grasp), was
why this (from the
shared_ptr docs)
struct null_deleter
{
    void operator()(void const *) const
    {
    }
};
Is implemented as a functor rather than a function.
There's nothing to grasp. The only difference is that sizeof(
null_deleter ) is 1,
...or effectively zero if EBO is leveraged.

-- 
Dave Abrahams
BoostPro Computing
http://www.boostpro.com