172 lines
5.3 KiB
Plaintext
172 lines
5.3 KiB
Plaintext
// (C) Copyright Gennadiy Rozental 2001.
|
|
// 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)
|
|
|
|
// See http://www.boost.org/libs/test for the library home page.
|
|
//
|
|
//! @file
|
|
//! Defines the is_forward_iterable collection type trait
|
|
// ***************************************************************************
|
|
|
|
#ifndef BOOST_TEST_UTILS_IS_FORWARD_ITERABLE_HPP
|
|
#define BOOST_TEST_UTILS_IS_FORWARD_ITERABLE_HPP
|
|
|
|
#if defined(BOOST_NO_CXX11_DECLTYPE) || \
|
|
defined(BOOST_NO_CXX11_NULLPTR) || \
|
|
defined(BOOST_NO_CXX11_TRAILING_RESULT_TYPES)
|
|
|
|
// some issues with boost.config
|
|
#if !defined(BOOST_MSVC) || BOOST_MSVC_FULL_VER < 170061030 /* VC2012 upd 5 */
|
|
#define BOOST_TEST_FWD_ITERABLE_CXX03
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(BOOST_TEST_FWD_ITERABLE_CXX03)
|
|
// Boost
|
|
#include <boost/mpl/bool.hpp>
|
|
|
|
// STL
|
|
#include <list>
|
|
#include <vector>
|
|
#include <map>
|
|
#include <set>
|
|
|
|
#else
|
|
|
|
// Boost
|
|
#include <boost/utility/declval.hpp>
|
|
#include <boost/type_traits/is_same.hpp>
|
|
#include <boost/type_traits/remove_reference.hpp>
|
|
#include <boost/type_traits/remove_cv.hpp>
|
|
#include <boost/test/utils/is_cstring.hpp>
|
|
|
|
// STL
|
|
#include <utility>
|
|
#include <type_traits>
|
|
|
|
#endif
|
|
//____________________________________________________________________________//
|
|
|
|
namespace boost {
|
|
namespace unit_test {
|
|
|
|
// ************************************************************************** //
|
|
// ************** is_forward_iterable ************** //
|
|
// ************************************************************************** //
|
|
|
|
#if defined(BOOST_TEST_FWD_ITERABLE_CXX03) && !defined(BOOST_TEST_DOXYGEN_DOC__)
|
|
template<typename T>
|
|
struct is_forward_iterable : public mpl::false_ {};
|
|
|
|
template<typename T>
|
|
struct is_forward_iterable<T const> : public is_forward_iterable<T> {};
|
|
|
|
template<typename T>
|
|
struct is_forward_iterable<T&> : public is_forward_iterable<T> {};
|
|
|
|
template<typename T, typename A>
|
|
struct is_forward_iterable< std::vector<T, A> > : public mpl::true_ {};
|
|
|
|
template<typename T, typename A>
|
|
struct is_forward_iterable< std::list<T, A> > : public mpl::true_ {};
|
|
|
|
template<typename K, typename V, typename C, typename A>
|
|
struct is_forward_iterable< std::map<K, V, C, A> > : public mpl::true_ {};
|
|
|
|
template<typename K, typename C, typename A>
|
|
struct is_forward_iterable< std::set<K, C, A> > : public mpl::true_ {};
|
|
|
|
// string is also forward iterable, even if sometimes we want to treat the
|
|
// assertions differently.
|
|
template<>
|
|
struct is_forward_iterable< std::string > : public mpl::true_ {};
|
|
|
|
#else
|
|
|
|
namespace ut_detail {
|
|
|
|
template<typename T>
|
|
struct is_present : public mpl::true_ {};
|
|
|
|
//____________________________________________________________________________//
|
|
|
|
// some compiler do not implement properly decltype non expression involving members (eg. VS2013)
|
|
// a workaround is to use -> decltype syntax.
|
|
template <class T>
|
|
struct has_member_size {
|
|
private:
|
|
struct nil_t {};
|
|
template<typename U> static auto test( U* ) -> decltype(boost::declval<U>().size());
|
|
template<typename> static nil_t test( ... );
|
|
|
|
public:
|
|
static bool const value = !std::is_same< decltype(test<T>( nullptr )), nil_t>::value;
|
|
};
|
|
|
|
//____________________________________________________________________________//
|
|
|
|
template <class T>
|
|
struct has_member_begin {
|
|
private:
|
|
struct nil_t {};
|
|
template<typename U> static auto test( U* ) -> decltype(boost::declval<U>().begin());
|
|
template<typename> static nil_t test( ... );
|
|
public:
|
|
static bool const value = !std::is_same< decltype(test<T>( nullptr )), nil_t>::value;
|
|
};
|
|
|
|
//____________________________________________________________________________//
|
|
|
|
template <class T>
|
|
struct has_member_end {
|
|
private:
|
|
struct nil_t {};
|
|
template<typename U> static auto test( U* ) -> decltype(boost::declval<U>().end());
|
|
template<typename> static nil_t test( ... );
|
|
public:
|
|
static bool const value = !std::is_same< decltype(test<T>( nullptr )), nil_t>::value;
|
|
};
|
|
|
|
//____________________________________________________________________________//
|
|
|
|
template <class T, class enabled = void>
|
|
struct is_forward_iterable_impl : std::false_type {
|
|
};
|
|
|
|
//____________________________________________________________________________//
|
|
|
|
template <class T>
|
|
struct is_forward_iterable_impl<
|
|
T,
|
|
typename std::enable_if<
|
|
is_present<typename T::const_iterator>::value &&
|
|
is_present<typename T::value_type>::value &&
|
|
has_member_size<T>::value &&
|
|
has_member_begin<T>::value &&
|
|
has_member_end<T>::value &&
|
|
!is_cstring<T>::value
|
|
>::type
|
|
> : std::true_type
|
|
{};
|
|
|
|
//____________________________________________________________________________//
|
|
|
|
} // namespace ut_detail
|
|
|
|
/*! Indicates that a specific type implements the forward iterable concept. */
|
|
template<typename T>
|
|
struct is_forward_iterable {
|
|
typedef typename std::remove_reference<T>::type T_ref;
|
|
typedef ut_detail::is_forward_iterable_impl<T_ref> is_fwd_it_t;
|
|
typedef mpl::bool_<is_fwd_it_t::value> type;
|
|
enum { value = is_fwd_it_t::value };
|
|
};
|
|
|
|
#endif /* defined(BOOST_TEST_FWD_ITERABLE_CXX03) */
|
|
|
|
} // namespace unit_test
|
|
} // namespace boost
|
|
|
|
#endif // BOOST_TEST_UTILS_IS_FORWARD_ITERABLE_HPP
|