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add container_range_traits default

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bolero-MURAKAMI 2016-04-18 00:34:15 +09:00
parent 0080332dd5
commit 8efb1a3748
23 changed files with 1822 additions and 1384 deletions
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76
sprout/container/detail/range_empty.hpp Normal file
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/*=============================================================================
Copyright (c) 2011-2016 Bolero MURAKAMI
https://github.com/bolero-MURAKAMI/Sprout
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)
=============================================================================*/
#ifndef SPROUT_CONTAINER_DETAIL_RANGE_EMPTY_HPP
#define SPROUT_CONTAINER_DETAIL_RANGE_EMPTY_HPP
#include <utility>
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/type_traits/integral_constant.hpp>
#include <sprout/type_traits/identity.hpp>
#include <sprout/container/traits_fwd.hpp>
#include <sprout/container/container_traits.hpp>
#include <sprout/container/range_functions_fwd.hpp>
#include <sprout/adl/not_found.hpp>
namespace sprout_adl {
sprout::not_found_via_adl range_empty(...);
} // namespace sprout_adl
namespace sprout {
namespace detail {
template<typename T>
struct has_mem_empty_test {
public:
template<
typename U = T,
typename = typename sprout::identity<decltype(std::declval<U>().empty())>::type
>
static sprout::true_type test(int);
static sprout::false_type test(...);
};
#if defined(_MSC_VER) && (_MSC_VER > 1900)
template<typename T, typename Base_ = typename sprout::identity<decltype(sprout::detail::has_mem_empty_test<T>::test(0))>::type>
struct has_mem_empty
: public Base_
{};
#else
template<typename T>
struct has_mem_empty
: public sprout::identity<decltype(sprout::detail::has_mem_empty_test<T>::test(0))>::type
{};
#endif
template<typename Container>
inline SPROUT_CONSTEXPR typename std::enable_if<
sprout::detail::has_mem_empty<Container const>::value,
bool
>::type
range_empty_impl(Container const& cont) {
return cont.empty();
}
template<typename Container>
inline SPROUT_CONSTEXPR typename std::enable_if<
!sprout::detail::has_mem_empty<Container const>::value,
bool
>::type
range_empty_impl(Container const& cont) {
return sprout::size(cont) == 0;
}
} // namespace detail
} // namespace sprout
namespace sprout_container_range_detail {
template<typename Container>
inline SPROUT_CONSTEXPR bool
range_empty(Container const& cont) {
return sprout::detail::range_empty_impl(cont);
}
} // namespace sprout_container_range_detail
#endif // #ifndef SPROUT_CONTAINER_DETAIL_RANGE_EMPTY_HPP