mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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91 lines
3 KiB
C++
91 lines
3 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2014 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_CONTAINER_SHRINK_TO_FIT_HPP
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#define SPROUT_CONTAINER_SHRINK_TO_FIT_HPP
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#include <utility>
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/type_traits/integral_constant.hpp>
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#include <sprout/type_traits/identity.hpp>
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#include <sprout/utility/forward.hpp>
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#include <sprout/adl/not_found.hpp>
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namespace sprout_adl {
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sprout::not_found_via_adl container_shrink_to_fit(...);
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} // namespace sprout_adl
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namespace sprout {
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namespace detail {
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template<typename T>
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struct has_mem_shrink_to_fit_test {
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public:
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template<
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typename U = T,
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typename = typename sprout::identity<decltype(std::declval<U>().shrink_to_fit())>::type
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>
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static sprout::true_type test(int);
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static sprout::false_type test(...);
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};
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#if defined(_MSC_VER)
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template<typename T, typename Base_ = typename sprout::identity<decltype(sprout::detail::has_mem_shrink_to_fit_test<T>::test(0))>::type>
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struct has_mem_shrink_to_fit
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: public Base_
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{};
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#else
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template<typename T>
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struct has_mem_shrink_to_fit
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: public sprout::identity<decltype(sprout::detail::has_mem_shrink_to_fit_test<T>::test(0))>::type
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{};
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#endif
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template<typename Container>
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inline SPROUT_CXX14_CONSTEXPR typename std::enable_if<
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sprout::detail::has_mem_shrink_to_fit<Container&&>::value
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>::type
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container_shrink_to_fit_default(Container&& cont) {
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return SPROUT_FORWARD(Container, cont).shrink_to_fit();
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}
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template<typename Container>
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inline SPROUT_CXX14_CONSTEXPR typename std::enable_if<
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!sprout::detail::has_mem_shrink_to_fit<Container&&>::value
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>::type
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container_shrink_to_fit_default(Container&&) {
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return ;
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}
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} // namespace detail
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namespace container_detail {
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template<typename Container>
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inline SPROUT_CXX14_CONSTEXPR void
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container_shrink_to_fit(Container&& cont) {
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return sprout::detail::container_shrink_to_fit_default(SPROUT_FORWARD(Container, cont));
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}
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} // namespace container_detail
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//
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// shrink_to_fit
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//
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// effect:
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// ADL callable container_shrink_to_fit(cont) -> container_shrink_to_fit(cont)
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// [default]
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// callable cont.shrink_to_fit() -> cont.shrink_to_fit()
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// otherwise -> no effects
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//
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template<typename Container>
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inline SPROUT_CXX14_CONSTEXPR void
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shrink_to_fit(Container&& cont) {
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using sprout::container_detail::container_shrink_to_fit;
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using sprout_adl::container_shrink_to_fit;
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return container_shrink_to_fit(SPROUT_FORWARD(Container, cont));
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}
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} // namespace sprout
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#include <sprout/container/container_range_traits.hpp>
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#endif // #ifndef SPROUT_CONTAINER_SHRINK_TO_FIT_HPP
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