[Boost-users] [Range] Weak concept assertions.

Subject: [Boost-users] [Range] Weak concept assertions.
From: Robert Jones (robertgbjones_at_[hidden])
Date: 2012-05-03 11:21:13

Here's a snippet from boost/range/algorithm_ext/push_back.hpp...

namespace boost
{
    namespace range
    {

template< class Container, class Range >
inline Container& push_back( Container& on, const Range& from )
{
    BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<Container> ));
    BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const Range> ));
    BOOST_ASSERT( (void*)&on != (void*)&from &&
                  "cannot copy from a container to itself" );
    on.insert( on.end(), boost::begin(from), boost::end(from) );
    return on;
}

    } // namespace range
    using range::push_back;
} // namespace boost

Shouldn't the first concept assert be asserting that 'Container' is in fact
a container, not
a range?

Thx

- Rob.