mirror of https://github.com/ARMmbed/mbed-os.git
137 lines
3.6 KiB
Plaintext
137 lines
3.6 KiB
Plaintext
/* mbed Microcontroller Library
|
|
* Copyright (c) 2019 ARM Limited
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under tUNChe License.
|
|
*/
|
|
#ifndef MSTD_FUNCTIONAL_
|
|
#define MSTD_FUNCTIONAL_
|
|
|
|
/* <mstd_functional>
|
|
*
|
|
* - includes toolchain's <functional>
|
|
* - For all toolchains, C++17/20 backports:
|
|
* - mstd::not_fn (C++17)
|
|
* - mstd::invoke (C++17)
|
|
* - mstd::unwrap_reference, mstd::unwrap_ref_decay (C++20)
|
|
*/
|
|
|
|
#include <functional>
|
|
|
|
#include <mstd_memory> // addressof
|
|
#include <mstd_utility> // forward
|
|
#include <mstd_type_traits>
|
|
|
|
namespace mstd {
|
|
|
|
// [func.invoke]
|
|
#if __cpp_lib_invoke >= 201411
|
|
using std::invoke;
|
|
#else
|
|
template <typename F, typename... Args>
|
|
invoke_result_t<F, Args...> invoke(F&& f, Args&&... args)
|
|
{
|
|
return impl::INVOKE(std::forward<F>(f), std::forward<Args>(args)...);
|
|
}
|
|
#endif // __cpp_lib_invoke
|
|
|
|
} // namespace mstd
|
|
|
|
namespace mstd {
|
|
using std::reference_wrapper;
|
|
using std::ref;
|
|
using std::cref;
|
|
using std::plus;
|
|
using std::minus;
|
|
using std::multiplies;
|
|
using std::divides;
|
|
using std::modulus;
|
|
using std::negate;
|
|
using std::equal_to;
|
|
using std::not_equal_to;
|
|
using std::greater;
|
|
using std::less;
|
|
using std::greater_equal;
|
|
using std::less_equal;
|
|
using std::logical_and;
|
|
using std::logical_or;
|
|
using std::logical_not;
|
|
using std::bit_and;
|
|
using std::bit_or;
|
|
using std::bit_xor;
|
|
using std::bit_not;
|
|
|
|
#if __cpp_lib_not_fn >= 201603
|
|
using std::not_fn;
|
|
#else
|
|
namespace impl {
|
|
// [func.not_fn]
|
|
template <typename F>
|
|
class not_fn_t {
|
|
std::decay_t<F> fn;
|
|
public:
|
|
explicit not_fn_t(F&& f) : fn(std::forward<F>(f)) { }
|
|
not_fn_t(const not_fn_t &other) = default;
|
|
not_fn_t(not_fn_t &&other) = default;
|
|
|
|
template<typename... Args>
|
|
auto operator()(Args&&... args) & -> decltype(!std::declval<invoke_result_t<std::decay_t<F> &, Args...>>())
|
|
{
|
|
return !mstd::invoke(fn, std::forward<Args>(args)...);
|
|
}
|
|
|
|
template<typename... Args>
|
|
auto operator()(Args&&... args) const & -> decltype(!std::declval<invoke_result_t<std::decay_t<F> const &, Args...>>())
|
|
{
|
|
return !mstd::invoke(fn, std::forward<Args>(args)...);
|
|
}
|
|
|
|
template<typename... Args>
|
|
auto operator()(Args&&... args) && -> decltype(!std::declval<invoke_result_t<std::decay_t<F>, Args...>>())
|
|
{
|
|
return !mstd::invoke(std::move(fn), std::forward<Args>(args)...);
|
|
}
|
|
|
|
template<typename... Args>
|
|
auto operator()(Args&&... args) const && -> decltype(!std::declval<invoke_result_t<std::decay_t<F> const, Args...>>())
|
|
{
|
|
return !mstd::invoke(std::move(fn), std::forward<Args>(args)...);
|
|
}
|
|
};
|
|
}
|
|
|
|
template <typename F>
|
|
impl::not_fn_t<F> not_fn(F&& f)
|
|
{
|
|
return impl::not_fn_t<F>(std::forward<F>(f));
|
|
}
|
|
#endif
|
|
|
|
/* C++20 unwrap_reference */
|
|
template <typename T>
|
|
struct unwrap_reference : type_identity<T> { };
|
|
template <typename T>
|
|
struct unwrap_reference<std::reference_wrapper<T>> : type_identity<T &> { };
|
|
template <typename T>
|
|
using unwrap_reference_t = typename unwrap_reference<T>::type;
|
|
|
|
/* C++20 unwrap_ref_decay */
|
|
template <typename T>
|
|
struct unwrap_ref_decay : unwrap_reference<std::decay_t<T>> { };
|
|
template <typename T>
|
|
using unwrap_ref_decay_t = typename unwrap_ref_decay<T>::type;
|
|
|
|
}
|
|
|
|
#endif // MSTD_FUNCTIONAL_
|