ceph/src/boost/libs/type_traits/doc/is_member_object_pointer.qbk

   1 [/
   2   Copyright 2007 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_member_object_pointer is_member_object_pointer]
   9    template <class T>
  10    struct is_member_object_pointer : public __tof {};
  11
  12 __inherit If T is a (possibly cv-qualified) pointer to a member object (a data member)
  13 then inherits from __true_type,
  14 otherwise inherits from __false_type.
  15
  16 __std_ref 3.9.2 and 8.3.3.
  17
  18 [all_compilers]
  19
  20 __header ` #include <boost/type_traits/is_member_object_pointer.hpp>` or ` #include <boost/type_traits.hpp>`
  21
  22 __examples
  23
  24 [:`is_member_object_pointer<int (MyClass::*)>` inherits from `__true_type`.]
  25
  26 [:`is_member_object_pointer<double (MyClass::*)>::type` is the type `__true_type`.]
  27
  28 [:`is_member_object_pointer<const int (MyClass::*)>::value` is an integral constant
  29 expression that evaluates to /true/.]
  30
  31 [:`is_member_object_pointer<int (MyClass::*)(void)>::value` is an integral constant
  32 expression that evaluates to /false/: the argument in this case is a pointer to
  33 a member function and not a member object, see __is_member_function_pointer
  34 and __is_member_pointer]
  35
  36 [:`is_member_object_pointer<T>::value_type` is the type `bool`.]
  37
  38 [endsect]
  39