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Telegram/ThirdParty/range-v3/include/range/v3/functional/arithmetic.hpp

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+/// \file
+// Range v3 library
+//
+//  Copyright Eric Niebler 2013-present
+//
+//  Use, modification and distribution is subject to the
+//  Boost Software License, Version 1.0. (See accompanying
+//  file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+// Project home: https://github.com/ericniebler/range-v3
+//
+#ifndef RANGES_V3_FUNCTIONAL_ARITHMETIC_HPP
+#define RANGES_V3_FUNCTIONAL_ARITHMETIC_HPP
+
+#include <concepts/concepts.hpp>
+
+#include <range/v3/detail/prologue.hpp>
+
+namespace ranges
+{
+    /// \addtogroup group-functional
+    /// @{
+    struct plus
+    {
+        template<typename T, typename U>
+        constexpr auto operator()(T && t, U && u) const -> decltype((T &&) t + (U &&) u)
+        {
+            return (T &&) t + (U &&) u;
+        }
+        using is_transparent = void;
+    };
+
+    struct minus
+    {
+        template<typename T, typename U>
+        constexpr auto operator()(T && t, U && u) const -> decltype((T &&) t - (U &&) u)
+        {
+            return (T &&) t - (U &&) u;
+        }
+        using is_transparent = void;
+    };
+
+    struct multiplies
+    {
+        template<typename T, typename U>
+        constexpr auto operator()(T && t, U && u) const -> decltype((T &&) t * (U &&) u)
+        {
+            return (T &&) t * (U &&) u;
+        }
+        using is_transparent = void;
+    };
+
+    struct bitwise_or
+    {
+        template<typename T, typename U>
+        constexpr auto operator()(T && t, U && u) const -> decltype((T &&) t | (U &&) u)
+        {
+            return (T &&) t | (U &&) u;
+        }
+        using is_transparent = void;
+    };
+
+    template<typename T>
+    struct convert_to
+    {
+        // clang-format off
+        template<typename U>
+        constexpr auto CPP_auto_fun(operator())(U &&u)(const)
+        (
+            return static_cast<T>((U &&) u)
+        )
+        // clang-format on
+    };
+
+    template<typename T>
+    struct coerce
+    {
+        constexpr T & operator()(T & t) const
+        {
+            return t;
+        }
+        /// \overload
+        constexpr T const & operator()(T const & t) const
+        {
+            return t;
+        }
+        /// \overload
+        constexpr T operator()(T && t) const
+        {
+            return (T &&) t;
+        }
+        T operator()(T const &&) const = delete;
+    };
+
+    template<typename T>
+    struct coerce<T const> : coerce<T>
+    {};
+
+    template<typename T>
+    struct coerce<T &> : coerce<T>
+    {};
+
+    template<typename T>
+    struct coerce<T &&> : coerce<T>
+    {};
+    /// @}
+} // namespace ranges
+
+#include <range/v3/detail/epilogue.hpp>
+
+#endif