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

   1 [/
   2   Copyright 2009 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:has_new_operator has_new_operator]
   9    template <class T>
  10    struct has_new_operator : public __tof {};
  11
  12 __inherit If T is a (possibly cv-qualified) type with an overloaded new-operator
  13 then inherits from __true_type, otherwise inherits from __false_type.
  14
  15 [has_binary_operator_compat]  Also known to be broken with the Borland/Codegear compilers.
  16
  17 __std_ref 12.5.
  18
  19 __header ` #include <boost/type_traits/has_new_operator.hpp>` or ` #include <boost/type_traits.hpp>`
  20
  21 __examples
  22
  23 Given:
  24
  25         class A { void* operator new(std::size_t); };
  26         class B { void* operator new(std::size_t, const std::nothrow&); };
  27         class C { void* operator new(std::size_t, void*); };
  28         class D { void* operator new[](std::size_t); };
  29         class E { void* operator new[](std::size_t, const std::nothrow&); };
  30         class F { void* operator new[](std::size_t, void*); };
  31
  32 Then:
  33
  34 [:`has_new_operator<A>` inherits from `__true_type`.]
  35
  36 [:`has_new_operator<B>` inherits from `__true_type`.]
  37
  38 [:`has_new_operator<C>` inherits from `__true_type`.]
  39
  40 [:`has_new_operator<D>` inherits from `__true_type`.]
  41
  42 [:`has_new_operator<E>` inherits from `__true_type`.]
  43
  44 [:`has_new_operator<F>` inherits from `__true_type`.]
  45
  46 [endsect]
  47