From: David Abrahams (dave_at_[hidden])
Date: 2005-12-12 16:38:41
Karl Friedrich Walkow <walkow_at_[hidden]> writes:
> i try to find a solution for eliminating all duplicates of types in a
> non-integral sequence.
> the only extisting solution i found has a set< > as output, but i want
> to keep the sequence type.
> the following code _should_ solve the problem, but there seems to be
> something wrong with it.
>
> if someone has an idea...
// untested
template <class S>
remove_duplicates
{
typedef typename fold<
S
, pair< typename clear<S>::type, set0<> >
, if_<
contains< second<_1>, _2 >
, _1
, pair<
push_back< first<_1>, _2>
, insert< second<_1>, _2 >
>
>
>::type::first type;
};
HTH,
-- Dave Abrahams Boost Consulting www.boost-consulting.com