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141 lines
6.9 KiB
C++
141 lines
6.9 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE framework.
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Copyright (c) Raw Material Software Limited
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JUCE is an open source framework subject to commercial or open source
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licensing.
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By downloading, installing, or using the JUCE framework, or combining the
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JUCE framework with any other source code, object code, content or any other
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copyrightable work, you agree to the terms of the JUCE End User Licence
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Agreement, and all incorporated terms including the JUCE Privacy Policy and
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the JUCE Website Terms of Service, as applicable, which will bind you. If you
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do not agree to the terms of these agreements, we will not license the JUCE
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framework to you, and you must discontinue the installation or download
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process and cease use of the JUCE framework.
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JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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JUCE Privacy Policy: https://juce.com/juce-privacy-policy
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JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
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Or:
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You may also use this code under the terms of the AGPLv3:
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https://www.gnu.org/licenses/agpl-3.0.en.html
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THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
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MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
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==============================================================================
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*/
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#ifndef DOXYGEN
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//==============================================================================
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/** The contents of this namespace are used to implement Animator and should not
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be used elsewhere. Their interfaces (and existence) are liable to change!
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*/
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namespace juce::detail::ArrayAndTupleOps
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{
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template <typename, typename = void>
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constexpr auto hasTupleSize = false;
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template <typename T>
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constexpr auto hasTupleSize<T, std::void_t<decltype (std::tuple_size<T>::value)>> = true;
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static_assert (! hasTupleSize<float>);
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static_assert (hasTupleSize<std::tuple<float, float>>);
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static_assert (hasTupleSize<std::array<float, 5>>);
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template <typename A, typename B, typename Op, size_t... Ix, std::enable_if_t<hasTupleSize<B>, int> = 0>
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constexpr auto& assignOpImpl (A& a, const B& b, Op&& op, std::index_sequence<Ix...>)
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{
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(op (std::get<Ix> (a), std::get<Ix> (b)), ...);
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return a;
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}
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template <typename A, typename B, typename Op, size_t... Ix, std::enable_if_t<! hasTupleSize<B>, int> = 0>
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constexpr auto& assignOpImpl (A& a, const B& b, Op&& op, std::index_sequence<Ix...>)
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{
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(op (std::get<Ix> (a), b), ...);
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return a;
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}
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template <typename A, typename B, typename Op, std::enable_if_t<hasTupleSize<A>, int> = 0>
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constexpr auto& assignOpImpl (A& a, const B& b, Op&& op)
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{
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return assignOpImpl (a, b, std::forward<Op> (op), std::make_index_sequence<std::tuple_size_v<A>>());
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}
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template <typename A, typename B, std::enable_if_t<hasTupleSize<A>, int> = 0>
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constexpr auto& operator+= (A& a, const B& b)
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{
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return assignOpImpl (a, b, [] (auto& x, auto y)
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{
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using Tx = std::remove_reference_t<decltype (x)>;
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using Ty = std::remove_reference_t<decltype (y)>;
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if constexpr (std::is_integral_v<Tx> && std::is_floating_point_v<Ty>)
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x = (Tx) std::round ((Ty) x + y);
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else
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x += y;
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});
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}
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template <typename A, typename B, std::enable_if_t<hasTupleSize<A>, int> = 0>
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constexpr auto& operator-= (A& a, const B& b)
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{
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return assignOpImpl (a, b, [] (auto& x, auto y)
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{
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using Tx = std::remove_reference_t<decltype (x)>;
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using Ty = std::remove_reference_t<decltype (y)>;
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if constexpr (std::is_integral_v<Tx> && std::is_floating_point_v<Ty>)
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x = (Tx) std::round ((Ty) x - y);
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else
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x -= y;
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});
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}
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template <typename A, typename B, std::enable_if_t<hasTupleSize<A>, int> = 0>
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constexpr auto& operator*= (A& a, const B& b)
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{
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return assignOpImpl (a, b, [] (auto& x, auto y)
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{
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using Tx = std::remove_reference_t<decltype (x)>;
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using Ty = std::remove_reference_t<decltype (y)>;
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if constexpr (std::is_integral_v<Tx> && std::is_floating_point_v<Ty>)
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x = (Tx) std::round ((Ty) x * y);
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else
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x *= y;
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});
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}
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template <typename A, typename B, std::enable_if_t<hasTupleSize<A>, int> = 0>
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constexpr auto& operator/= (A& a, const B& b)
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{
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return assignOpImpl (a, b, [] (auto& x, auto y)
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{
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using Tx = std::remove_reference_t<decltype (x)>;
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using Ty = std::remove_reference_t<decltype (y)>;
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if constexpr (std::is_integral_v<Tx> && std::is_floating_point_v<Ty>)
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x = (Tx) std::round ((Ty) x / y);
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else
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x /= y;
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});
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}
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template <typename A, typename B, std::enable_if_t<hasTupleSize<A>, int> = 0> constexpr auto operator+ (const A& a, const B& b) { A copy { a }; return copy += b; }
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template <typename A, typename B, std::enable_if_t<hasTupleSize<A>, int> = 0> constexpr auto operator- (const A& a, const B& b) { A copy { a }; return copy -= b; }
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template <typename A, typename B, std::enable_if_t<hasTupleSize<A>, int> = 0> constexpr auto operator* (const A& a, const B& b) { A copy { a }; return copy *= b; }
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template <typename A, typename B, std::enable_if_t<hasTupleSize<A>, int> = 0> constexpr auto operator/ (const A& a, const B& b) { A copy { a }; return copy /= b; }
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static_assert (std::tuple (1.0f, 5.0) + 3.0f == std::tuple (4.0f, 8.0));
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static_assert (std::tuple (1.0f, 5.0) - 1.0f == std::tuple (0.0f, 4.0));
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static_assert (std::tuple (1, 2, 3) * std::tuple (4, 5, 6) == std::tuple (4, 10, 18));
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} // namespace juce::detail::ArrayAndTupleOps
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#endif
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