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92 lines
3.1 KiB
C++
92 lines
3.1 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/bits/external/hacks.h>
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#include <units/bits/external/type_traits.h>
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#include <units/isq/si/area.h>
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#include <units/isq/si/length.h>
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#include <units/isq/si/speed.h>
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#include <units/isq/si/time.h>
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using namespace units;
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using namespace units::isq;
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using namespace units::isq::si;
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using namespace units::isq::si::references;
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static_assert(2 * m == 2_q_m);
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static_assert(2 * s == 2_q_s);
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template<auto& s>
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concept invalid_operations = requires {
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requires !requires { 2 / s; };
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requires !requires { s / 2; };
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requires !requires { s * 2; };
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requires !requires { s + 2; };
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requires !requires { 2 + s; };
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requires !requires { s + s; };
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requires !requires { s - 2; };
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requires !requires { 2 - s; };
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requires !requires { s - s; };
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requires !requires { s + 1_q_s; };
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requires !requires { s - 1_q_s; };
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requires !requires { s * 1_q_s; };
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requires !requires { s / 1_q_s; };
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requires !requires { 1_q_s + s; };
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requires !requires { 1_q_s - s; };
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requires !requires { 1_q_s * s; };
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requires !requires { 1_q_s / s; };
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};
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static_assert(invalid_operations<s>);
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static_assert(2_q_m / (1 * s) == 2_q_m_per_s);
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static_assert(2 * (m / s) == 2_q_m_per_s);
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#if !(UNITS_COMP_GCC == 10 && UNITS_COMP_GCC_MINOR == 1) // GCC 10.1.0 ICEs
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constexpr auto m_per_s = m / s;
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static_assert(2 * ::m_per_s == 2_q_m_per_s);
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#endif
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static_assert(120 * km / (2 * h) == 60_q_km_per_h);
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static_assert([] {
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const auto length{120};
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const auto duration{2};
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return length * km / (duration * h);
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}() == 60_q_km_per_h);
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static_assert(is_same_v<decltype(std::int64_t{120} * km / (2 * h)), decltype(60_q_km_per_h)>);
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static_assert(is_same_v<decltype(120.L * km / (2 * h)), decltype(60._q_km_per_h)>);
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static_assert(1. / 4 * m2 == 1._q_m2 / 4);
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UNITS_DIAGNOSTIC_PUSH
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UNITS_DIAGNOSTIC_IGNORE_SHADOW
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constexpr bool test_hiding() {
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Speed auto v0 = 10 * (m / s);
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signed s = 2; // hides ^
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Length auto v = 20 * m / s;
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/* */ v0 = 10 * (m / ::s);
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return !is_same_v<decltype(v0), decltype(v)>;
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}
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static_assert(test_hiding());
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UNITS_DIAGNOSTIC_POP
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int main() {}
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