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1d42c4f6de
Per XLS-0095, we are taking steps to rename ripple(d) to xrpl(d). This change specifically removes all copyright notices referencing Ripple, XRPLF, and certain affiliated contributors upon mutual agreement, so the notice in the LICENSE.md file applies throughout. Copyright notices referencing external contributions remain as-is. Duplicate verbiage is also removed.
99 lines
2.3 KiB
C++
99 lines
2.3 KiB
C++
// 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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// Official repository: https://github.com/boostorg/beast
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//
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#ifndef BEAST_CONTAINER_DETAIL_EMPTY_BASE_OPTIMIZATION_H_INCLUDED
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#define BEAST_CONTAINER_DETAIL_EMPTY_BASE_OPTIMIZATION_H_INCLUDED
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#include <boost/type_traits/is_final.hpp>
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#include <type_traits>
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#include <utility>
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namespace beast {
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namespace detail {
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template <class T>
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struct is_empty_base_optimization_derived
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: std::integral_constant<
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bool,
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std::is_empty<T>::value && !boost::is_final<T>::value>
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{
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};
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template <
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class T,
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int UniqueID = 0,
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bool isDerived = is_empty_base_optimization_derived<T>::value>
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class empty_base_optimization : private T
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{
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public:
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empty_base_optimization() = default;
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empty_base_optimization(empty_base_optimization&&) = default;
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empty_base_optimization(empty_base_optimization const&) = default;
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empty_base_optimization&
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operator=(empty_base_optimization&&) = default;
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empty_base_optimization&
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operator=(empty_base_optimization const&) = default;
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template <class Arg1, class... ArgN>
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explicit empty_base_optimization(Arg1&& arg1, ArgN&&... argn)
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: T(std::forward<Arg1>(arg1), std::forward<ArgN>(argn)...)
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{
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}
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T&
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member() noexcept
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{
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return *this;
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}
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T const&
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member() const noexcept
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{
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return *this;
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}
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};
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//------------------------------------------------------------------------------
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template <class T, int UniqueID>
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class empty_base_optimization<T, UniqueID, false>
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{
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T t_;
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public:
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empty_base_optimization() = default;
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empty_base_optimization(empty_base_optimization&&) = default;
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empty_base_optimization(empty_base_optimization const&) = default;
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empty_base_optimization&
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operator=(empty_base_optimization&&) = default;
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empty_base_optimization&
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operator=(empty_base_optimization const&) = default;
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template <class Arg1, class... ArgN>
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explicit empty_base_optimization(Arg1&& arg1, ArgN&&... argn)
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: t_(std::forward<Arg1>(arg1), std::forward<ArgN>(argn)...)
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{
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}
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T&
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member() noexcept
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{
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return t_;
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}
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T const&
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member() const noexcept
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{
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return t_;
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}
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};
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} // namespace detail
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} // namespace beast
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#endif
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