forked from mpusz/mp-units
110 lines
3.5 KiB
C++
110 lines
3.5 KiB
C++
// 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/quantity.h>
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#include <units/physical/si/prefixes.h>
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#include <iostream>
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using namespace units;
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namespace fps {
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struct foot : named_unit<foot, "ft", no_prefix> {};
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struct yard : named_scaled_unit<yard, "yd", no_prefix, ratio(3), foot> {};
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struct dim_length : base_dimension<"L", foot> {};
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template<UnitOf<dim_length> U, QuantityValue Rep = double>
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using length = quantity<dim_length, U, Rep>;
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} // namespace fps
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namespace si {
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struct metre : named_unit<metre, "m", units::physical::si::prefix> {};
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struct kilometre : prefixed_unit<kilometre, units::physical::si::kilo, metre> {};
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struct dim_length : base_dimension<"L", metre> {};
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template<UnitOf<dim_length> U, QuantityValue Rep = double>
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using length = quantity<dim_length, U, Rep>;
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namespace fps {
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struct foot : named_scaled_unit<foot, "ft", no_prefix, ratio(3'048, 1'000, -1), metre> {};
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struct yard : named_scaled_unit<yard, "yd", no_prefix, ratio(3), foot> {};
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struct dim_length : base_dimension<"L", foot> {};
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template<UnitOf<dim_length> U, QuantityValue Rep = double>
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using length = quantity<dim_length, U, Rep>;
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} // namespace fps
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} // namespace si
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void conversions()
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{
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// constexpr auto fps_yard = fps::length<fps::yard>(1.);
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// std::cout << quantity_cast<si::kilometre>(fps_yard) << "\n";
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constexpr auto si_fps_yard = si::fps::length<si::fps::yard>(1.);
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std::cout << quantity_cast<si::kilometre>(si_fps_yard) << "\n";
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}
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void unknown_dimensions()
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{
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constexpr auto fps_yard = fps::length<fps::yard>(1.);
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constexpr auto fps_area = quantity_cast<unknown_coherent_unit>(fps_yard * fps_yard);
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std::cout << fps_yard << "\n";
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std::cout << fps_area << "\n";
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constexpr auto si_fps_yard = si::fps::length<si::fps::yard>(1.);
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constexpr auto si_fps_area = quantity_cast<unknown_coherent_unit>(si_fps_yard * si_fps_yard);
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std::cout << si_fps_yard << "\n";
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std::cout << si_fps_area << "\n";
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}
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std::ostream& operator<<(std::ostream& os, const ratio& r)
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{
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return os << "ratio{" << r.num << ", " << r.den << ", " << r.exp << "}";
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}
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template<Unit U>
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std::ostream& operator<<(std::ostream& os, const U& u)
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{
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using unit_type = std::remove_cvref_t<decltype(u)>;
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return os << unit_type::ratio << " x " << unit_type::reference::symbol.standard();
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}
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void what_is_your_ratio()
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{
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std::cout << "fps: " << fps::yard() << "\n";
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std::cout << "si::fps: " << si::fps::yard() << "\n";
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}
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int main()
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{
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conversions();
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unknown_dimensions();
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what_is_your_ratio();
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}
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