forked from mpusz/mp-units
65 lines
2.8 KiB
C++
65 lines
2.8 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/dimensions/voltage.h>
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/* ************** DERIVED DIMENSIONS THAT INCLUDE UNITS WITH SPECIAL NAMES **************** */
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namespace {
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using namespace std::experimental::units;
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// power spectral density
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// todo: add support for make_dimension_t of non base units
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// struct power_spectral_density : make_dimension_t<exp<voltage, 2>, exp<frequency, -1>> {};
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struct power_spectral_density
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: make_dimension_t<exp<base_dim_mass, 2>, exp<base_dim_length, 4>, exp<base_dim_time, -6>, exp<base_dim_time, -1>> {
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};
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struct sq_volt_per_hertz : unit<power_spectral_density> {};
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// amplitude spectral density
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// struct dimension_amplitude_spectral_density : make_dimension_t<exp<voltage, 1>, exp<frequency, -1, 2>> {};
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struct amplitude_spectral_density
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: make_dimension_t<exp<base_dim_mass, 1>, exp<base_dim_length, 2>, exp<base_dim_time, -3>, exp<base_dim_current, -1>, exp<base_dim_time, 1, 2>> {
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};
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// todo: add support for derived_unit
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//struct volt_per_sq_hertz : derived_unit<amplitude_spectral_density, kilogram, metre, second, ampere > {};
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struct volt_per_sqrt_hertz : unit<amplitude_spectral_density> {};
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}
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namespace std::experimental::units {
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template<> struct downcasting_traits<downcast_from<power_spectral_density>> : downcast_to<power_spectral_density> {};
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template<> struct downcasting_traits<downcast_from<sq_volt_per_hertz>> : downcast_to<sq_volt_per_hertz> {};
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template<> struct downcasting_traits<downcast_from<amplitude_spectral_density>> : downcast_to<amplitude_spectral_density> {};
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template<> struct downcasting_traits<downcast_from<volt_per_sqrt_hertz>> : downcast_to<volt_per_sqrt_hertz> {};
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}
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namespace {
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//static_assert(sqrt(quantity<sq_volt_per_hertz>(4)) = quantity<volt_per_sqrt_hertz>(2));
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}
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