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Add "back_free_capacity" utility

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Ion Gaztañaga
2020-08-09 23:54:52 +02:00
parent d271c6384d
commit e02b5c9bde
1 changed files with 25 additions and 0 deletions
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25
include/boost/container/detail/is_contiguous_container.hpp
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@@ -26,6 +26,14 @@
#define BOOST_INTRUSIVE_HAS_MEMBER_FUNCTION_CALLABLE_WITH_MAX 0 #define BOOST_INTRUSIVE_HAS_MEMBER_FUNCTION_CALLABLE_WITH_MAX 0
#include <boost/intrusive/detail/has_member_function_callable_with.hpp> #include <boost/intrusive/detail/has_member_function_callable_with.hpp>
//back_free_capacity
#define BOOST_INTRUSIVE_HAS_MEMBER_FUNCTION_CALLABLE_WITH_FUNCNAME back_free_capacity
#define BOOST_INTRUSIVE_HAS_MEMBER_FUNCTION_CALLABLE_WITH_NS_BEG namespace boost { namespace container { namespace back_free_capacity_detail {
#define BOOST_INTRUSIVE_HAS_MEMBER_FUNCTION_CALLABLE_WITH_NS_END }}}
#define BOOST_INTRUSIVE_HAS_MEMBER_FUNCTION_CALLABLE_WITH_MIN 0
#define BOOST_INTRUSIVE_HAS_MEMBER_FUNCTION_CALLABLE_WITH_MAX 0
#include <boost/intrusive/detail/has_member_function_callable_with.hpp>
namespace boost { namespace boost {
namespace container { namespace container {
namespace dtl { namespace dtl {
@@ -40,6 +48,23 @@ struct is_contiguous_container
has_member_function_callable_with_data<const Container>::value; has_member_function_callable_with_data<const Container>::value;
}; };
template < class Container
, bool = boost::container::back_free_capacity_detail::
has_member_function_callable_with_back_free_capacity<const Container>::value>
struct back_free_capacity
{
static typename Container::size_type get(const Container &c)
{ return c.back_free_capacity(); }
};
template < class Container>
struct back_free_capacity<Container, false>
{
static typename Container::size_type get(const Container &c)
{ return c.capacity() - c.size(); }
};
} //namespace dtl { } //namespace dtl {
} //namespace container { } //namespace container {
} //namespace boost { } //namespace boost {