forked from mpusz/mp-units
Chip Hogg
d19b2803ce
This commit is huge, but hopefully the cognitive load is not too bad. The bulk of this commit is just some fairly mechanical updates from `ratio` to `Magnitude`. Other things to call out: - `UnitRatio` goes away. We don't need this concept, because Magnitude can't even _represent_ anything that doesn't satisfy it. - I commented out some formatting test cases where the precise expression changes, but the number is completely equivalent. We will need to decide how we want to handle Magnitude formatting as a separate, follow-on task. But at least Magnitude gives us all the tools we'll need to do so!
83 lines
3.7 KiB
C++
83 lines
3.7 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 "test_tools.h"
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#include <units/base_dimension.h>
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#include <units/bits/equivalent.h>
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#include <units/bits/external/downcasting.h>
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#include <units/derived_dimension.h>
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#include <units/isq/si/prefixes.h>
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#include <units/unit.h>
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namespace {
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using namespace units;
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using namespace units::isq;
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struct metre : named_unit<metre, "m", si::prefix> {};
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struct centimetre : prefixed_unit<centimetre, si::centi, metre> {};
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struct kilometre : prefixed_unit<kilometre, si::kilo, metre> {};
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struct yard : named_scaled_unit<yard, "yd", no_prefix, as_magnitude<ratio(9'144, 1, -4)>(), metre> {};
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struct foot : named_scaled_unit<foot, "ft", no_prefix, as_magnitude<ratio(1, 3)>(), yard> {};
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struct dim_length : base_dimension<"length", metre> {};
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struct second : named_unit<second, "s", si::prefix> {};
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struct hour : named_scaled_unit<hour, "h", no_prefix, as_magnitude<ratio(36, 1, 2)>(), second> {};
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struct dim_time : base_dimension<"time", second> {};
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struct kelvin : named_unit<kelvin, "K", no_prefix> {};
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#if !UNITS_COMP_MSVC
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static_assert([]<Prefix P>(P) {
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return !requires { typename prefixed_unit<struct kilokelvin, P, kelvin>; };
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}(si::kilo{})); // no prefix allowed
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#endif
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struct metre_per_second : unit<metre_per_second> {};
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struct dim_speed :
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derived_dimension<dim_speed, metre_per_second, units::exponent<dim_length, 1>, units::exponent<dim_time, -1>> {};
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struct kilometre_per_hour : derived_unit<kilometre_per_hour, dim_speed, kilometre, hour> {};
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static_assert(equivalent<metre::named_unit, metre>);
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static_assert(equivalent<metre::scaled_unit, metre>);
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static_assert(compare<downcast<scaled_unit<as_magnitude<1>(), metre>>, metre>);
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static_assert(compare<downcast<scaled_unit<as_magnitude<ratio(1, 1, -2)>(), metre>>, centimetre>);
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static_assert(
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compare<downcast<scaled_unit<as_magnitude<ratio(yard::ratio.num, yard::ratio.den, yard::ratio.exp)>(), metre>>,
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yard>);
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static_assert(compare<downcast<scaled_unit<yard::mag / as_magnitude<3>(), metre>>, foot>);
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static_assert(compare<downcast<scaled_unit<kilometre::mag / hour::mag, metre_per_second>>, kilometre_per_hour>);
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// We should delete this test case, because we are switching from ratio to Magnitude, and a negative Magnitude cannot
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// even be formed.
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// #if !UNITS_COMP_MSVC
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// static_assert([]<ratio R>() {
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// return !requires { typename scaled_unit<R, metre>; };
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// }.template operator()<as_magnitude<ratio(-1, 1)>()>()); // negative unit ratio
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// #endif
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static_assert(centimetre::symbol == "cm");
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static_assert(kilometre::symbol == "km");
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static_assert(kilometre_per_hour::symbol == "km/h");
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} // namespace
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