tetl 0.1.0
Embedded Template Library
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negate.hpp
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1// SPDX-License-Identifier: BSL-1.0
2
3#ifndef TETL_FUNCTIONAL_NEGATE_HPP
4#define TETL_FUNCTIONAL_NEGATE_HPP
5
6#include <etl/_utility/forward.hpp>
7
8namespace etl {
9
13template <typename T = void>
14struct negate {
15 [[nodiscard]] constexpr auto operator()(T const& arg) const -> T { return -arg; }
16};
17
18template <>
19struct negate<void> {
20 using is_transparent = void;
21
22 template <typename T>
23 [[nodiscard]] constexpr auto operator()(T&& arg) const noexcept(noexcept(-etl::forward<T>(arg)))
24 -> decltype(-etl::forward<T>(arg))
25 {
26 return -etl::forward<T>(arg);
27 }
28};
29
30} // namespace etl
31
32#endif // TETL_FUNCTIONAL_NEGATE_HPP
etl::arg
constexpr auto arg(complex< T > const &z) noexcept -> T
Definition arg.hpp:15
etl
Definition adjacent_find.hpp:8
etl::forward
constexpr auto forward(remove_reference_t< T > &param) noexcept -> T &&
Forwards lvalues as either lvalues or as rvalues, depending on T. When t is a forwarding reference (a...
Definition forward.hpp:18
etl::negate< void >::operator()
constexpr auto operator()(T &&arg) const noexcept(noexcept(-etl::forward< T >(arg))) -> decltype(-etl::forward< T >(arg))
Definition negate.hpp:23
etl::negate< void >::is_transparent
void is_transparent
Definition negate.hpp:20
etl::negate
Function object for performing negation. Effectively calls operator- on an instance of type T....
Definition negate.hpp:14
etl::negate::operator()
constexpr auto operator()(T const &arg) const -> T
Definition negate.hpp:15