ceph/src/boost/libs/test/include/boost/test/utils/is_cstring.hpp

   1 //  (C) Copyright Gennadiy Rozental 2001.
   2 //  Distributed under the Boost Software License, Version 1.0.
   3 //  (See accompanying file LICENSE_1_0.txt or copy at
   4 //  http://www.boost.org/LICENSE_1_0.txt)
   5
   6 //  See http://www.boost.org/libs/test for the library home page.
   7 //
   8 //  File        : $RCSfile$
   9 //
  10 //  Version     : $Revision$
  11 //
  12 //  Description : defines the is_cstring type trait
  13 // ***************************************************************************
  14
  15 #ifndef BOOST_TEST_UTILS_IS_CSTRING_HPP
  16 #define BOOST_TEST_UTILS_IS_CSTRING_HPP
  17
  18 // Boost
  19 #include <boost/mpl/bool.hpp>
  20 #include <boost/type_traits/is_same.hpp>
  21 #include <boost/type_traits/decay.hpp>
  22 #include <boost/type_traits/remove_pointer.hpp>
  23
  24 //____________________________________________________________________________//
  25
  26 namespace boost {
  27 namespace unit_test {
  28
  29 // ************************************************************************** //
  30 // **************                  is_cstring                  ************** //
  31 // ************************************************************************** //
  32
  33 namespace ut_detail {
  34
  35 template<typename T>
  36 struct is_cstring_impl : public mpl::false_ {};
  37
  38 template<typename T>
  39 struct is_cstring_impl<T const*> : public is_cstring_impl<T*> {};
  40
  41 template<typename T>
  42 struct is_cstring_impl<T const* const> : public is_cstring_impl<T*> {};
  43
  44 template<>
  45 struct is_cstring_impl<char*> : public mpl::true_ {};
  46
  47 template<>
  48 struct is_cstring_impl<wchar_t*> : public mpl::true_ {};
  49
  50 } // namespace ut_detail
  51
  52 template<typename T>
  53 struct is_cstring : public ut_detail::is_cstring_impl<typename decay<T>::type> {};
  54
  55 } // namespace unit_test
  56 } // namespace boost
  57
  58 #endif // BOOST_TEST_UTILS_IS_CSTRING_HPP