// The MIT License (MIT) // // Copyright (c) 2018 Mateusz Pusz // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in all // copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE // SOFTWARE. #include #include #include #include using namespace units::physical; constexpr Speed auto avg_speed(Length auto d, Time auto t) { return d / t; } int main() { using namespace units::physical::si::literals; Speed auto v1 = avg_speed(220_q_km, 2_q_h); Speed auto v2 = avg_speed(si::length(140), si::time(2)); #if DOWNCAST_MODE == 0 Speed auto v3 = quantity_cast(v2); #else Speed auto v3 = quantity_cast(v2); #endif Speed auto v4 = quantity_cast(v3); std::cout << v1 << '\n'; // 110 km/h std::cout << fmt::format("{}", v2) << '\n'; // 70 mi/h std::cout << fmt::format("{:%Q in %q}", v3) << '\n'; // 31.2928 in m/s std::cout << fmt::format("{:%Q}", v4) << '\n'; // 31 }