forked from mpusz/mp-units
252 lines
11 KiB
C++
252 lines
11 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/si/si.h>
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namespace {
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using namespace units;
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using namespace units::si::unit_symbols;
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// clang-format off
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DERIVED_DIMENSION(activity, decltype(1 / isq::time));
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// clang-format on
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// check for invalid prefixes
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template<template<auto U> typename prefix, Unit auto V1>
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concept can_not_be_prefixed = !requires { typename prefix<V1>; };
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static_assert(can_not_be_prefixed<si::milli_, si::degree_Celsius>);
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static_assert(can_not_be_prefixed<si::milli_, si::minute>);
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static_assert(can_not_be_prefixed<si::milli_, si::hour>);
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static_assert(can_not_be_prefixed<si::milli_, si::day>);
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static_assert(can_not_be_prefixed<si::milli_, si::kilogram>);
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static_assert(can_not_be_prefixed<si::milli_, si::hectare>);
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static_assert(can_not_be_prefixed<si::milli_, si::metre / si::second>);
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// Comparisons
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// Same dimension type & different unit
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// static_assert(1000 * isq::length[m] == 1 * isq::length[km]);
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// Named and derived dimensions (same units)
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static_assert(10 * isq::length[m] / (2 * isq::time[s]) == 5 * isq::speed[m / s]);
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static_assert(5 * isq::speed[m / s] == 10 * isq::length[m] / (2 * isq::time[s]));
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// Same named dimension & different but equivalent unit
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static_assert(10 * isq::frequency[1 / s] == 10 * isq::frequency[Hz]);
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static_assert(10 * isq::frequency[Hz] == 10 * isq::frequency[1 / s]);
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// Named and derived dimensions (different but equivalent units)
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static_assert(10 / (2 * isq::time[s]) == 5 * isq::frequency[Hz]);
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static_assert(5 * isq::frequency[Hz] == 10 / (2 * isq::time[s]));
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static_assert(5 * isq::force[N] * (2 * isq::length[m]) == 10 * isq::energy[J]);
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static_assert(10 * isq::energy[J] == 5 * isq::force[N] * (2 * isq::length[m]));
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// Different named dimensions
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template<Reference auto R1, Reference auto R2>
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concept invalid_comparison = !requires { 2 * R1 == 2 * R2; } && !requires { 2 * R2 == 2 * R1; };
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static_assert(invalid_comparison<activity[Bq], isq::frequency[Hz]>);
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// Arithmetics
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// Named and derived dimensions (same units)
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static_assert(10 * isq::length[m] / (2 * isq::time[s]) + 5 * isq::speed[m / s] == 10 * isq::speed[m / s]);
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static_assert(5 * isq::speed[m / s] + 10 * isq::length[m] / (2 * isq::time[s]) == 10 * isq::speed[m / s]);
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static_assert(10 * isq::length[m] / (2 * isq::time[s]) - 5 * isq::speed[m / s] == 0 * isq::speed[m / s]);
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static_assert(5 * isq::speed[m / s] - 10 * isq::length[m] / (2 * isq::time[s]) == 0 * isq::speed[m / s]);
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static_assert(
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is_same_v<decltype(10 * isq::length[m] / (2 * isq::time[s]) + 5 * isq::speed[m / s]),
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quantity<reference<isq::speed, derived_unit<struct si::metre, per<struct si::second>>{}>{}, int>>);
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static_assert(
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is_same_v<decltype(5 * isq::speed[m / s] + 10 * isq::length[m] / (2 * isq::time[s])),
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quantity<reference<isq::speed, derived_unit<struct si::metre, per<struct si::second>>{}>{}, int>>);
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static_assert(
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is_same_v<decltype(10 * isq::length[m] / (2 * isq::time[s]) - 5 * isq::speed[m / s]),
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quantity<reference<isq::speed, derived_unit<struct si::metre, per<struct si::second>>{}>{}, int>>);
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static_assert(
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is_same_v<decltype(5 * isq::speed[m / s] - 10 * isq::length[m] / (2 * isq::time[s])),
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quantity<reference<isq::speed, derived_unit<struct si::metre, per<struct si::second>>{}>{}, int>>);
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// Named and derived dimensions (different units)
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static_assert(10 / (2 * isq::time[s]) + 5 * isq::frequency[Hz] == 10 * isq::frequency[Hz]);
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static_assert(5 * isq::frequency[Hz] + 10 / (2 * isq::time[s]) == 10 * isq::frequency[Hz]);
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static_assert(10 / (2 * isq::time[s]) - 5 * isq::frequency[Hz] == 0 * isq::frequency[Hz]);
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static_assert(5 * isq::frequency[Hz] - 10 / (2 * isq::time[s]) == 0 * isq::frequency[Hz]);
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static_assert(is_same_v<decltype(10 / (2 * isq::time[s]) + 5 * isq::frequency[Hz]),
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quantity<reference<isq::frequency, si::hertz>{}, int>>);
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static_assert(is_same_v<decltype(5 * isq::frequency[Hz] + 10 / (2 * isq::time[s])),
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quantity<reference<isq::frequency, si::hertz>{}, int>>);
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static_assert(is_same_v<decltype(10 / (2 * isq::time[s]) - 5 * isq::frequency[Hz]),
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quantity<reference<isq::frequency, si::hertz>{}, int>>);
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static_assert(is_same_v<decltype(5 * isq::frequency[Hz] - 10 / (2 * isq::time[s])),
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quantity<reference<isq::frequency, si::hertz>{}, int>>);
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// Different named dimensions
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template<typename... Ts>
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consteval bool invalid_arithmetic(Ts... ts)
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{
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return !requires { (... + ts); } && !requires { (... - ts); };
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}
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static_assert(invalid_arithmetic(5 * activity[Bq], 5 * isq::frequency[Hz]));
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static_assert(invalid_arithmetic(5 * activity[Bq], 10 / (2 * isq::time[s]), 5 * isq::frequency[Hz]));
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// Implicit conversions allowed between quantities of `convertible` references
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constexpr quantity<isq::speed[km / h]> speed = 120 * isq::length[km] / (2 * isq::time[h]);
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// Explicit casts allow changing all or only a part of the type
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static_assert(
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std::is_same_v<decltype(quantity_cast<isq::speed>(120 * isq::length[km] / (2 * isq::time[h]))),
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quantity<reference<isq::speed, derived_unit<std::remove_const_t<decltype(si::kilo<si::metre>)>,
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per<struct si::hour>>{}>{},
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int>>);
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auto q3 = quantity_cast<m / s>(120 * isq::length[km] / (2 * isq::time[h]));
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auto q4 = quantity_cast<isq::speed[m / s]>(120 * isq::length[km] / (2 * isq::time[h]));
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auto q5 = quantity_cast<double>(120 * isq::length[km] / (2 * isq::time[h]));
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auto q6 = quantity_cast<quantity<isq::speed[m / s], double>>(120 * isq::length[km] / (2 * isq::time[h]));
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// cast 1 / time to use Hz
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// static_assert(quantity_of<decltype(60 * isq::speed[km / h]), isq::speed>);
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// static_assert(quantity_of<decltype(120 * isq::length[km] / (2 * isq::time[h])), isq::speed>);
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// static_assert(quantity_of<decltype(120 * isq::length[km] / (2 * isq::time[h])), isq::speed[km / h]>);
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// static_assert(!quantity_of<decltype(120 * isq::length[km] / (2 * isq::time[h])), isq::speed[m / s]>);
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// quantity<reference<speed, derived_unit<si::metre, per<si::second>>>, int> s = 5 * speed[m / s];
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// quantity<reference<derived_dimension<length, per<time>>, derived_unit<metre, per<second>>>, int> q =
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// 10 * length[m] / (2 * isq::time[s]);
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// auto q1 = 10 * length[m] / (2 * isq::time[s]) + 5 * speed[m / s]; // should this be allowed?
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// bool b1 = (10 * length[m] / (2 * isq::time[s]) == 5 * speed[m / s]); // should this be allowed?
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// auto q2 = 10 / (2 * isq::time[s]) + 5 * frequency[Hz]; // should this be allowed?
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// bool b2 = (10 / (2 * isq::time[s]) == 5 * frequency[Hz]); // should this be allowed?
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// auto q3 = 5 * activity[Bq] + 5 * frequency[Hz]; // should this be allowed?
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// auto b3 = (5 * activity[Bq] == 5 * frequency[Hz]); // should this be allowed?
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// auto q4 = 5 * activity[Bq] + 10 / (2 * isq::time[s]) + 5 * frequency[Hz]; // should this be allowed?
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// auto q5 = 120 * length[km] / (2 * isq::time[h]); // not speed
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// auto q6 = quantity_cast<dim_speed>(120 * length[km] / (2 * isq::time[h]));
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// auto q7 = quantity_cast<speed[m / s]>(120 * length[km] / (2 * isq::time[h]));
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// quantity<speed[km / h]> s = q5; // should this implicit conversion be allowed?
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} // namespace
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namespace units {
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template<typename T, Dimension auto D, Unit auto U>
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inline constexpr bool is_exactly_quantity_of =
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is_same_v<decltype(T::dimension), decltype(D)> && is_same_v<decltype(T::unit), decltype(U)>;
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}
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namespace units::isq::si {
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// quantity tests
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// static_assert(
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// is_exactly_quantity_of<decltype(4 * length[km] / (2 * length[m])), dimensionless, derived_unit<kilometre,
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// per<metre>>>);
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// static_assert(QuantityOf<decltype(4 * length[km] / (2 * length[m])), dimensionless, derived_unit<kilometre,
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// per<metre>>); static_assert(QuantityOf<decltype(4 * length[km] / (2 * length[m])), dimensionless, derived_unit<metre,
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// per<millimetre>>);
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// // TODO Should this compile?
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} // namespace units::isq::si
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// using namespace units;
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// using namespace units::si;
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// using namespace units::si::unit_symbols;
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// /* Frequency */ auto freq1 = 20 * frequency[Hz];
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// // /* Frequency */ auto freq2 = 20 / (1 * isq::time[s]);
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// quantity<frequency[Hz]> freq3(20);
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// quantity<frequency[1 / s]> freq4(20);
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// quantity<dimensionless[one] / isq::time[s]> freq5(20);
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// /* Speed */ auto speed1 = 20 * speed[m / s];
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// /* Speed */ auto speed2 = 20 * (length[m] / isq::time[s]);
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// quantity<speed[km / s]> speed3(20);
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// quantity<length[m] / isq::time[s]> speed4(20);
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// constexpr auto avg_speed(quantity<length[km]> d, quantity<isq::time[h]> t) { return d / t; }
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#include <iostream>
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int main()
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{
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using enum text_encoding;
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using enum unit_symbol_denominator;
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using enum unit_symbol_separator;
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std::cout << unit_symbol(si::kilogram / si::metre / square<si::second>, {.denominator = always_solidus}) << "\n";
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// std::cout << unit_symbol(si::metre / si::second, {.denominator = unit_symbol_denominator::always_negative}) <<
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// "\n"; std::cout << unit_symbol(si::metre / si::second, {.denominator = unit_symbol_denominator::always_negative})
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// <<
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// "\n";
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// static_assert(unit_symbol(metre / second, {.denominator = always_negative, .separator = dot}) == "m⋅s⁻¹");
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// std::cout << get_unit_symbol(si::minute / square<si::second>).standard().c_str() << "\n";
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// std::cout << get_unit_symbol(si::joule / si::minute).standard().c_str() << "\n";
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// print<decltype(speed)>();
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// print<decltype(freq1)>();
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// // print<decltype(freq2)>();
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// print<decltype(freq3)>();
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// print<decltype(freq4)>();
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// print<decltype(freq5)>();
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// print<decltype(speed1)>();
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// print<decltype(speed2)>();
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// print<decltype(speed3)>();
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// print<decltype(speed4)>();
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}
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// 1 * joule + 1 * erg ???
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// joule * erg???
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// joule / erg???
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// auto d1 = 42 * isq::length[si::kilo<si::metre>];
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// auto d2 = 42 * isq::length[cgs::centimetre];
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// auto s1 = 42 * isq::speed[si::metre / si::second];
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// auto s2 = 42 * isq::speed[cgs::centimetre / si::second];
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// auto e1 = 42 * isq::energy[si::joule];
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// auto e2 = 42 * isq::energy[cgs::erg];
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// auto e2_bad = 42 * isq::energy[cgs::erg / si::second];
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// auto p1 = 42 * isq::power[si::watt];
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// auto p2 = 42 * isq::power[cgs::erg / si::second];
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// type of Rep{1} * (mag<ratio(662'607'015, 100'000'000)> * mag_power<10, -34> * energy[joule] * time[second])
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// and inline constexpr auto planck_constant = Rep{1} * mag_planck * energy[joule] * time[second];
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// quantity_cast on equivalent dimensions
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