forked from mpusz/mp-units
Overconstrained quantity operations relaxed
This commit is contained in:
Mateusz Pusz
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// The MIT License (MIT)
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//
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// Copyright (c) 2018 Mateusz Pusz
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#include "units/math.h"
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#include "units/physical/si/area.h"
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#include "units/physical/si/frequency.h"
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#include "units/physical/si/velocity.h"
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#include <chrono>
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#include <utility>
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using namespace units;
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namespace {
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template<typename T>
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struct equality_ops {
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[[nodiscard]] friend constexpr bool operator==(T lhs, T rhs) { return lhs.value_ == rhs.value_; }
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[[nodiscard]] friend constexpr bool operator!=(T lhs, T rhs) { return !(lhs == rhs); }
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};
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template<typename T>
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struct scaling_ops {
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[[nodiscard]] friend constexpr T operator*(T lhs, T rhs) {
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return T(lhs.value_ * rhs.value_);
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}
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[[nodiscard]] friend constexpr T operator/(T lhs, T rhs) {
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return T(lhs.value_ / rhs.value_);
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}
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};
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template<typename T>
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struct scalar_ops : equality_ops<T>, scaling_ops<T> {};
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template<typename T>
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struct impl_constructible : scalar_ops<impl_constructible<T>> {
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T value_{};
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impl_constructible() = default;
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constexpr impl_constructible(T v) : value_(std::move(v)) {}
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// no conversion to fundamental arithmetic types
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};
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template<typename T>
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using impl = impl_constructible<T>;
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template<typename T>
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struct expl_constructible : scalar_ops<expl_constructible<T>> {
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T value_{};
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expl_constructible() = default;
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constexpr expl_constructible(T v) : value_(std::move(v)) {}
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// no conversion to fundamental arithmetic types
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};
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template<typename T>
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using expl = expl_constructible<T>;
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template<typename T>
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struct impl_constructible_impl_convertible : scalar_ops<impl_constructible_impl_convertible<T>> /*, int_scaling_ops<impl_constructible_impl_convertible<T>> */ {
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T value_{};
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impl_constructible_impl_convertible() = default;
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constexpr impl_constructible_impl_convertible(T v) : value_(std::move(v)) {}
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constexpr operator const T&() const& { return value_; }
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};
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template<typename T>
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using impl_impl = impl_constructible_impl_convertible<T>;
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static_assert(std::convertible_to<float, impl_impl<float>>);
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static_assert(std::convertible_to<impl_impl<float>, float>);
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static_assert(units::Scalar<impl_impl<float>>);
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template<typename T>
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struct expl_constructible_impl_convertible : scalar_ops<expl_constructible_impl_convertible<T>> {
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T value_{};
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expl_constructible_impl_convertible() = default;
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constexpr explicit expl_constructible_impl_convertible(T v) : value_(std::move(v)) {}
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constexpr operator const T&() const& { return value_; }
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};
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template<typename T>
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using expl_impl = expl_constructible_impl_convertible<T>;
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static_assert(!std::convertible_to<float, expl_impl<float>>);
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static_assert(std::convertible_to<expl_impl<float>, float>);
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static_assert(units::Scalar<expl_impl<float>>);
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template<typename T>
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struct impl_constructible_expl_convertible : scalar_ops<impl_constructible_expl_convertible<T>> {
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T value_{};
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impl_constructible_expl_convertible() = default;
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constexpr impl_constructible_expl_convertible(T v) : value_(std::move(v)) {}
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constexpr explicit operator const T&() const& { return value_; }
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};
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template<typename T>
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using impl_expl = impl_constructible_expl_convertible<T>;
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static_assert(std::convertible_to<float, impl_expl<float>>);
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static_assert(!std::convertible_to<impl_expl<float>, float>);
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static_assert(units::Scalar<impl_expl<float>>);
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template<typename T>
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struct expl_constructible_expl_convertible : scalar_ops<expl_constructible_expl_convertible<T>> {
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T value_{};
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expl_constructible_expl_convertible() = default;
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constexpr explicit expl_constructible_expl_convertible(T v) : value_(std::move(v)) {}
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constexpr explicit operator const T&() const& { return value_; }
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};
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template<typename T>
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using expl_expl = expl_constructible_expl_convertible<T>;
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static_assert(!std::convertible_to<float, expl_expl<float>>);
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static_assert(!std::convertible_to<expl_expl<float>, float>);
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static_assert(units::Scalar<expl_expl<float>>);
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} // namespace
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namespace units {
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template<typename T>
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inline constexpr bool treat_as_floating_point<impl<T>> = std::is_floating_point_v<T>;
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template<typename T>
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inline constexpr bool treat_as_floating_point<expl_constructible<T>> = std::is_floating_point_v<T>;
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template<typename T>
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inline constexpr bool treat_as_floating_point<impl_impl<T>> = std::is_floating_point_v<T>;
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template<typename T>
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inline constexpr bool treat_as_floating_point<expl_impl<T>> = std::is_floating_point_v<T>;
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template<typename T>
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inline constexpr bool treat_as_floating_point<impl_expl<T>> = std::is_floating_point_v<T>;
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template<typename T>
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inline constexpr bool treat_as_floating_point<expl_expl<T>> = std::is_floating_point_v<T>;
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template<typename T>
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struct quantity_values<impl<T>> {
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static constexpr impl<T> zero() { return 0; }
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static constexpr impl<T> max() { return std::numeric_limits<T>::max(); }
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static constexpr impl<T> min() { return std::numeric_limits<T>::lowest(); }
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};
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} // namespace units
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namespace {
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using namespace units::si;
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// constructors
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// Quantity from Scalar
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// int <- int
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static_assert(length<metre, int>(expl_impl<int>(1)).count() == 1);
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// static_assert(length<metre, int>(impl_expl<int>(1)).count() == 1); // should not compile (not convertible)
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static_assert(length<metre, int>(int(impl_expl<int>(1))).count() == 1);
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// static_assert(length<metre, expl_impl<int>>(1).count() == expl_impl<int>{1}); // should not compile (not convertible)
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static_assert(length<metre, expl_impl<int>>(expl_impl<int>(1)).count() == expl_impl<int>{1});
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static_assert(length<metre, impl_expl<int>>(1).count() == impl_expl<int>{1});
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// double <- double
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static_assert(length<metre, double>(expl_impl<double>(1.0)).count() == 1.0);
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// static_assert(length<metre, double>(impl_expl<double>(1.0)).count() == 1.0); // should not compile (not convertible)
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static_assert(length<metre, double>(double(impl_expl<double>(1.0))).count() == 1.0);
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// static_assert(length<metre, expl_impl<double>>(1.0).count() == expl_impl<double>{1.0}); // should not compile (not convertible)
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static_assert(length<metre, expl_impl<double>>(expl_impl<double>(1.0)).count() == expl_impl<double>{1.0});
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static_assert(length<metre, impl_expl<double>>(1.0).count() == impl_expl<double>{1.0});
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// double <- int
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static_assert(length<metre, double>(expl_impl<int>(1)).count() == 1.0);
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// static_assert(length<metre, double>(impl_expl<int>(1)).count() == 1.0); // should not compile (not convertible)
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static_assert(length<metre, double>(int(impl_expl<int>(1))).count() == 1.0);
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// static_assert(length<metre, expl_impl<double>>(1).count() == expl_impl<double>{1}); // should not compile (not convertible)
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static_assert(length<metre, expl_impl<double>>(expl_impl<double>(1)).count() == expl_impl<double>{1});
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static_assert(length<metre, impl_expl<double>>(1).count() == impl_expl<double>{1.0});
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// int <- double
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// static_assert(length<metre, int>(expl_impl<double>(1.0)).count() == 1); // should not compile (truncating conversion)
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// static_assert(length<metre, impl_expl<int>>(1.0).count() == impl_expl<int>{1}); // should not compile (truncating conversion)
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// Quantity from other Quantity with different Rep
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// int <- int
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static_assert(length<metre, int>(length<metre, expl_impl<int>>(expl_impl<int>(1))).count() == 1);
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// static_assert(length<metre, int>(length<metre, impl_expl<int>>(1)).count() == 1); // should not compile (not convertible)
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static_assert(length<metre, int>(quantity_cast<int>(length<metre, impl_expl<int>>(1))).count() == 1);
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// static_assert(length<metre, expl_impl<int>>(length<metre, int>(1)).count() == expl_impl<int>{1}); // should not compile (not convertible)
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static_assert(length<metre, expl_impl<int>>(quantity_cast<expl_impl<int>>(length<metre, int>(1))).count() == expl_impl<int>{1});
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static_assert(length<metre, impl_expl<int>>(length<metre, int>(1)).count() == impl_expl<int>{1});
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// double <- double
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static_assert(length<metre, double>(length<metre, expl_impl<double>>(expl_impl<double>(1.0))).count() == 1.0);
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// static_assert(length<metre, double>(length<metre, impl_expl<double>>(1.0)).count() == 1.0); // should not compile (not convertible)
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static_assert(length<metre, double>(quantity_cast<double>(length<metre, impl_expl<double>>(1.0))).count() == 1.0);
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// static_assert(length<metre, expl_impl<double>>(length<metre>(1.0).count() == expl_impl<double>{1.0}); // should not compile (not convertible)
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static_assert(length<metre, expl_impl<double>>(quantity_cast<expl_impl<double>>(length<metre>(1.0))).count() == expl_impl<double>{1.0});
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static_assert(length<metre, impl_expl<double>>(length<metre>(1.0)).count() == impl_expl<double>{1.0});
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// double <- int
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static_assert(length<metre, double>(length<metre, expl_impl<int>>(expl_impl<int>(1))).count() == 1.0);
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// static_assert(length<metre, double>(length<metre, impl_expl<int>>(1)).count() == 1.0); // should not compile (not convertible)
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static_assert(length<metre, double>(quantity_cast<int>(length<metre, impl_expl<int>>(1))).count() == 1.0);
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// static_assert(length<metre, expl_impl<double>>(length<metre, int>(1)).count() == expl_impl<double>{1}); // should not compile (not convertible)
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static_assert(length<metre, expl_impl<double>>(quantity_cast<expl_impl<double>>(length<metre, int>(1))).count() == expl_impl<double>{1});
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static_assert(length<metre, impl_expl<double>>(length<metre, int>(1)).count() == impl_expl<double>{1.0});
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// int <- double
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// static_assert(length<metre, int>(length<metre, expl_impl<double>>(1.0)).count() == 1); // should not compile (truncating conversion)
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// static_assert(length<metre, impl_expl<int>>(length<metre, double>(1.0)).count() == impl_expl<int>{1}); // should not compile (truncating conversion)
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// unit conversions
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static_assert(length<metre, impl<int>>(length<kilometre, impl<int>>(1)).count() == impl<int>(1000));
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static_assert(length<metre, expl<int>>(length<kilometre, expl<int>>(expl(1))).count() == expl<int>(1000));
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static_assert(length<metre, impl_impl<int>>(length<kilometre, impl_impl<int>>(1)).count() == impl_impl<int>(1000));
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static_assert(length<metre, impl_expl<int>>(length<kilometre, impl_expl<int>>(1)).count() == impl_expl<int>(1000));
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static_assert(length<metre, expl_impl<int>>(length<kilometre, expl_impl<int>>(expl_impl(1))).count() == expl_impl<int>(1000));
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static_assert(length<metre, expl_expl<int>>(length<kilometre, expl_expl<int>>(expl_expl(1))).count() == expl_expl<int>(1000));
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// static_assert(length<kilometre, impl<int>>(length<metre, impl<int>>(2000)).count() == impl<int>(2)); // should not compile (truncating conversion)
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static_assert(length<kilometre, impl<int>>(quantity_cast<kilometre>(length<metre, impl<int>>(2000))).count() == impl<int>(2));
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// static_assert(length<kilometre, expl<int>>(length<metre, expl<int>>(expl<int>(2000))).count() == expl<int>(2)); // should not compile (truncating conversion)
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static_assert(length<kilometre, expl<int>>(quantity_cast<kilometre>(length<metre, expl<int>>(expl<int>(2000)))).count() == expl<int>(2));
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// static_assert(length<kilometre, impl_impl<int>>(length<metre, impl_impl<int>>(2000)).count() == impl_impl<int>(2)); // should not compile (truncating conversion)
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static_assert(length<kilometre, impl_impl<int>>(quantity_cast<kilometre>(length<metre, impl_impl<int>>(2000))).count() == impl_impl<int>(2));
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// static_assert(length<kilometre, impl_expl<int>>(length<metre, impl_expl<int>>(2000)).count() == impl_expl<int>(2)); // should not compile (truncating conversion)
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static_assert(length<kilometre, impl_expl<int>>(quantity_cast<kilometre>(length<metre, impl_expl<int>>(2000))).count() == impl_expl<int>(2));
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// static_assert(length<kilometre, expl_impl<int>>(length<metre, expl_impl<int>>(expl_impl<int>(2000))).count() == expl_impl<int>(2)); // should not compile (truncating conversion)
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static_assert(length<kilometre, expl_impl<int>>(quantity_cast<kilometre>(length<metre, expl_impl<int>>(expl_impl<int>(2000)))).count() == expl_impl<int>(2));
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// static_assert(length<kilometre, expl_expl<int>>(length<metre, expl_expl<int>>(expl_expl<int>(2000))).count() == expl_expl<int>(2)); // should not compile (truncating conversion)
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static_assert(length<kilometre, expl_expl<int>>(quantity_cast<kilometre>(length<metre, expl_expl<int>>(expl_expl<int>(2000)))).count() == expl_expl<int>(2));
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// static_assert(velocity<metre_per_second, impl<int>>(velocity<kilometre_per_hour, impl<int>>(72)).count() == impl<int>(20)); // should not compile (truncating conversion)
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static_assert(velocity<metre_per_second, impl<int>>(quantity_cast<metre_per_second>(velocity<kilometre_per_hour, impl<int>>(72))).count() == impl<int>(20));
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// static_assert(velocity<metre_per_second, expl<int>>(velocity<kilometre_per_hour, expl<int>>(expl(72))).count() == expl<int>(20)); // should not compile (truncating conversion)
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static_assert(velocity<metre_per_second, expl<int>>(quantity_cast<metre_per_second>(velocity<kilometre_per_hour, expl<int>>(expl(72)))).count() == expl<int>(20));
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// static_assert(velocity<metre_per_second, impl_impl<int>>(velocity<kilometre_per_hour, impl_impl<int>>(72)).count() == impl_impl<int>(20)); // should not compile (truncating conversion)
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static_assert(velocity<metre_per_second, impl_impl<int>>(quantity_cast<metre_per_second>(velocity<kilometre_per_hour, impl_impl<int>>(72))).count() == impl_impl<int>(20));
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// static_assert(velocity<metre_per_second, impl_expl<int>>(velocity<kilometre_per_hour, impl_expl<int>>(72)).count() == impl_expl<int>(20)); // should not compile (truncating conversion)
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static_assert(velocity<metre_per_second, impl_expl<int>>(quantity_cast<metre_per_second>(velocity<kilometre_per_hour, impl_expl<int>>(72))).count() == impl_expl<int>(20));
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// static_assert(velocity<metre_per_second, expl_impl<int>>(velocity<kilometre_per_hour, expl_impl<int>>(expl_impl(72))).count() == expl_impl<int>(20)); // should not compile (truncating conversion)
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static_assert(velocity<metre_per_second, expl_impl<int>>(quantity_cast<metre_per_second>(velocity<kilometre_per_hour, expl_impl<int>>(expl_impl(72)))).count() == expl_impl<int>(20));
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// static_assert(velocity<metre_per_second, expl_expl<int>>(velocity<kilometre_per_hour, expl_expl<int>>(expl_expl(72))).count() == expl_expl<int>(20)); // should not compile (truncating conversion)
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static_assert(velocity<metre_per_second, expl_expl<int>>(quantity_cast<metre_per_second>(velocity<kilometre_per_hour, expl_expl<int>>(expl_expl(72)))).count() == expl_expl<int>(20));
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// static_assert(velocity<kilometre_per_hour, impl<int>>(velocity<metre_per_second, impl<int>>(20)).count() == impl<int>(72)); // should not compile (truncating conversion)
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static_assert(velocity<kilometre_per_hour, impl<int>>(quantity_cast<kilometre_per_hour>(velocity<metre_per_second, impl<int>>(20))).count() == impl<int>(72));
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// static_assert(velocity<kilometre_per_hour, expl<int>>(velocity<metre_per_second, expl<int>>(expl<int>(20))).count() == expl<int>(72)); // should not compile (truncating conversion)
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static_assert(velocity<kilometre_per_hour, expl<int>>(quantity_cast<kilometre_per_hour>(velocity<metre_per_second, expl<int>>(expl<int>(20)))).count() == expl<int>(72));
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// static_assert(velocity<kilometre_per_hour, impl_impl<int>>(velocity<metre_per_second, impl_impl<int>>(20)).count() == impl_impl<int>(72)); // should not compile (truncating conversion)
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static_assert(velocity<kilometre_per_hour, impl_impl<int>>(quantity_cast<kilometre_per_hour>(velocity<metre_per_second, impl_impl<int>>(20))).count() == impl_impl<int>(72));
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// static_assert(velocity<kilometre_per_hour, impl_expl<int>>(velocity<metre_per_second, impl_expl<int>>(20)).count() == impl_expl<int>(72)); // should not compile (truncating conversion)
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static_assert(velocity<kilometre_per_hour, impl_expl<int>>(quantity_cast<kilometre_per_hour>(velocity<metre_per_second, impl_expl<int>>(20))).count() == impl_expl<int>(72));
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// static_assert(velocity<kilometre_per_hour, expl_impl<int>>(velocity<metre_per_second, expl_impl<int>>(expl_impl<int>(20))).count() == expl_impl<int>(72)); // should not compile (truncating conversion)
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static_assert(velocity<kilometre_per_hour, expl_impl<int>>(quantity_cast<kilometre_per_hour>(velocity<metre_per_second, expl_impl<int>>(expl_impl<int>(20)))).count() == expl_impl<int>(72));
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// static_assert(velocity<kilometre_per_hour, expl_expl<int>>(velocity<metre_per_second, expl_expl<int>>(expl_expl<int>(20))).count() == expl_expl<int>(72)); // should not compile (truncating conversion)
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static_assert(velocity<kilometre_per_hour, expl_expl<int>>(quantity_cast<kilometre_per_hour>(velocity<metre_per_second, expl_expl<int>>(expl_expl<int>(20)))).count() == expl_expl<int>(72));
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} // namespace
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