134 lines
4.2 KiB
C++
Executable File
134 lines
4.2 KiB
C++
Executable File
// (C) Copyright Gennadiy Rozental 2001.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// See http://www.boost.org/libs/test for the library home page.
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//
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//! @file
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//! Defines the is_cstring type trait
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// ***************************************************************************
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#ifndef BOOST_TEST_UTILS_IS_CSTRING_HPP
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#define BOOST_TEST_UTILS_IS_CSTRING_HPP
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// Boost
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#include <boost/mpl/bool.hpp>
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#include <boost/type_traits/is_same.hpp>
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#include <boost/type_traits/decay.hpp>
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#include <boost/type_traits/remove_pointer.hpp>
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#include <boost/type_traits/remove_const.hpp>
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#include <boost/type_traits/add_const.hpp>
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#include <boost/test/utils/basic_cstring/basic_cstring_fwd.hpp>
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#include <string>
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#if defined(BOOST_TEST_STRING_VIEW)
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#include <string_view>
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#endif
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//____________________________________________________________________________//
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namespace boost {
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namespace unit_test {
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// ************************************************************************** //
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// ************** is_cstring ************** //
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// ************************************************************************** //
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namespace ut_detail {
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template<typename T>
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struct is_cstring_impl : public mpl::false_ {};
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template<typename T>
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struct is_cstring_impl<T const*> : public is_cstring_impl<T*> {};
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template<typename T>
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struct is_cstring_impl<T const* const> : public is_cstring_impl<T*> {};
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template<>
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struct is_cstring_impl<char*> : public mpl::true_ {};
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template<>
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struct is_cstring_impl<wchar_t*> : public mpl::true_ {};
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template <typename T, bool is_cstring = is_cstring_impl<typename boost::decay<T>::type>::value >
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struct deduce_cstring_transform_impl;
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template <typename T, bool is_cstring >
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struct deduce_cstring_transform_impl<T&, is_cstring> : public deduce_cstring_transform_impl<T, is_cstring>{};
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template <typename T, bool is_cstring >
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struct deduce_cstring_transform_impl<T const, is_cstring> : public deduce_cstring_transform_impl<T, is_cstring>{};
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template <typename T>
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struct deduce_cstring_transform_impl<T, true> {
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typedef typename boost::add_const<
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typename boost::remove_pointer<
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typename boost::decay<T>::type
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>::type
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>::type U;
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typedef boost::unit_test::basic_cstring<U> type;
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};
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template <typename T>
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struct deduce_cstring_transform_impl< T, false > {
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typedef typename
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boost::remove_const<
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typename boost::remove_reference<T>::type
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>::type type;
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};
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template <typename T>
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struct deduce_cstring_transform_impl< std::basic_string<T, std::char_traits<T> >, false > {
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typedef boost::unit_test::basic_cstring<typename boost::add_const<T>::type> type;
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};
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#if defined(BOOST_TEST_STRING_VIEW)
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template <typename T>
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struct deduce_cstring_transform_impl< std::basic_string_view<T, std::char_traits<T> >, false > {
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private:
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using sv_t = std::basic_string_view<T, std::char_traits<T> > ;
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public:
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using type = stringview_cstring_helper<typename boost::add_const<T>::type, sv_t>;
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};
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#endif
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} // namespace ut_detail
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template<typename T>
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struct is_cstring : public ut_detail::is_cstring_impl<typename decay<T>::type> {};
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template<typename T, bool is_cstring = is_cstring<typename boost::decay<T>::type>::value >
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struct is_cstring_comparable: public mpl::false_ {};
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template<typename T>
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struct is_cstring_comparable< T, true > : public mpl::true_ {};
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template<typename T>
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struct is_cstring_comparable< std::basic_string<T, std::char_traits<T> >, false > : public mpl::true_ {};
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#if defined(BOOST_TEST_STRING_VIEW)
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template<typename T>
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struct is_cstring_comparable< std::basic_string_view<T, std::char_traits<T> >, false > : public mpl::true_ {};
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#endif
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template<typename T>
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struct is_cstring_comparable< boost::unit_test::basic_cstring<T>, false > : public mpl::true_ {};
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template <class T>
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struct deduce_cstring_transform {
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typedef typename
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boost::remove_const<
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typename boost::remove_reference<T>::type
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>::type U;
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typedef typename ut_detail::deduce_cstring_transform_impl<typename boost::decay<U>::type>::type type;
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};
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} // namespace unit_test
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} // namespace boost
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#endif // BOOST_TEST_UTILS_IS_CSTRING_HPP
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