feedc0de/boost_range
1
0
Fork 0
forked from boostorg/range
Code Pull Requests Activity

push_back: added support for not-copyable but moveable value-types like e.g. unique_ptr

Browse Source
This commit is contained in:
Christopher Wecht
2017-09-01 17:53:46 +02:00
parent e65434eb4f
commit d99628981d
2 changed files with 116 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
include/boost/range/algorithm_ext/push_back.hpp
View File

@ -20,9 +20,37 @@
namespace boost
{
namespace range
#if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
namespace range_detail
{
template < class Container, class Range >
inline Container& push_back_impl( Container& on, Range&& from, std::false_type)
{
BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<Range> ));
BOOST_ASSERT_MSG(!range_detail::is_same_object(on, from),
"cannot move from a container to itself");
on.insert( on.end(),
std::make_move_iterator(boost::begin(from)),
std::make_move_iterator(boost::end(from)));
return on;
}
template < class Container, class Range >
inline Container& push_back_impl( Container& on, const Range& from, std::true_type)
{
BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const Range> ));
BOOST_ASSERT_MSG(!range_detail::is_same_object(on, from),
"cannot copy from a container to itself");
on.insert( on.end(), boost::begin(from), boost::end(from));
return on;
}
} //namespace range_detail
#endif
namespace range {
#if defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
template< class Container, class Range >
inline Container& push_back( Container& on, const Range& from )
{
@ -34,6 +62,19 @@ inline Container& push_back( Container& on, const Range& from )
return on;
}
#else
template< class Container, class Range >
inline Container& push_back( Container& on, Range&& from )
{
BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<Container> ));
range_detail::push_back_impl(on,
std::forward<Range>(from),
std::is_lvalue_reference<Range>() );
return on;
}
#endif
} // namespace range
using range::push_back;
} // namespace boost