From: Ronald Garcia (garcia_at_[hidden])
Date: 2008-05-16 22:01:56
On May 16, 2008, at 6:33 PM, Peter Dimov wrote:
> Ronald Garcia:
>> Hi all,
>>
>> boost::reference_wrapper exists at the top-level of boost (in boost/
>> ref.hpp), but that header provides no way to unwrap a
>> reference_wrapper. There are two implementations floating around of
>> "unwrap", one in boost.bind's implementation details, and one in
>> boost.mpl's implementation details. Is there any problem with
>> providing a version of unwrap in ref.hpp?
>
> What is the specification of unwrap that you have in mind?
Something like the following:
template< typename F >
inline
F& unwrap(F& f)
{
return f;
}
template< typename F >
inline
F&
unwrap(reference_wrapper<F>& f)
{
return f;
}
template< typename F >
inline
F&
unwrap(reference_wrapper<F> const& f)
{
return f;
}
The above is adapted from the mpl implementation.
ron