[ceph.git] / ceph / src / boost / libs / type_traits / doc / is_default_constructible.qbk

[/ 
  Copyright 2015 John Maddock.
  Distributed under the Boost Software License, Version 1.0.
  (See accompanying file LICENSE_1_0.txt or copy at
  http://www.boost.org/LICENSE_1_0.txt).
]

[section:is_default_constructible is_default_constructible]

   template <class T>
   struct is_default_constructible : public __tof {};
    
__inherit If `T` can be default-constructed
then inherits from __true_type, otherwise inherits from __false_type.  Type `T`
must be a complete type.

__compat This trait requires the C++11 feature `decltype` support for full support.
While there is some fallback code for cases where this is not the case, the trait should really be considered broken in that case.

__header ` #include <boost/type_traits/is_copy_constructible.hpp>` or ` #include <boost/type_traits.hpp>`

[endsect]
Commit	Line	Data
7c673cae FG	1	[/
	2	Copyright 2015 John Maddock.
	3	Distributed under the Boost Software License, Version 1.0.
	4	(See accompanying file LICENSE_1_0.txt or copy at
	5	http://www.boost.org/LICENSE_1_0.txt).
	6	]
	7
	8	[section:is_default_constructible is_default_constructible]
	9
	10	template <class T>
	11	struct is_default_constructible : public __tof {};
	12
	13	__inherit If `T` can be default-constructed
	14	then inherits from __true_type, otherwise inherits from __false_type. Type `T`
	15	must be a complete type.
	16
	17	__compat This trait requires the C++11 feature `decltype` support for full support.
	18	While there is some fallback code for cases where this is not the case, the trait should really be considered broken in that case.
	19
	20	__header ` #include <boost/type_traits/is_copy_constructible.hpp>` or ` #include <boost/type_traits.hpp>`
	21
	22	[endsect]
	23