| 1 | /* |
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| 2 | * Copyright Andrey Semashev 2024. |
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| 3 | * Distributed under the Boost Software License, Version 1.0. |
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| 4 | * (See accompanying file LICENSE_1_0.txt or copy at |
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| 5 | * http://www.boost.org/LICENSE_1_0.txt) |
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| 6 | */ |
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| 7 | /*! |
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| 8 | * \file functor.hpp |
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| 9 | * \author Andrey Semashev |
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| 10 | * \date 2024-01-23 |
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| 11 | * |
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| 12 | * This header contains a \c functor implementation. This is a function object |
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| 13 | * that invokes a function that is specified as its template parameter. |
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| 14 | */ |
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| 15 | |
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| 16 | #ifndef BOOST_CORE_FUNCTOR_HPP |
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| 17 | #define BOOST_CORE_FUNCTOR_HPP |
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| 18 | |
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| 19 | namespace boost::core { |
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| 20 | |
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| 21 | // Block unintended ADL |
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| 22 | namespace functor_ns { |
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| 23 | |
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| 24 | //! A function object that invokes a function specified as its template parameter |
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| 25 | template< auto Function > |
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| 26 | struct functor |
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| 27 | { |
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| 28 | template< typename... Args > |
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| 29 | auto operator() (Args&&... args) const noexcept(noexcept(Function(static_cast< Args&& >(args)...))) -> decltype(Function(static_cast< Args&& >(args)...)) |
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| 30 | { |
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| 31 | return Function(static_cast< Args&& >(args)...); |
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| 32 | } |
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| 33 | }; |
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| 34 | |
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| 35 | } // namespace functor_ns |
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| 36 | |
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| 37 | using functor_ns::functor; |
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| 38 | |
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| 39 | } // namespace boost::core |
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| 40 | |
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| 41 | #endif // BOOST_CORE_FUNCTOR_HPP |
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| 42 | |
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