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added HEP specific units and definitions

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in accordance with https://www.bipm.org/documents/20126/41483022/SI-Brochure-9.pdf#page=147

see also disccusion thread #292
This commit is contained in:
Ralph J. Steinhagen
2021-08-03 10:56:47 +02:00
committed by rstein
parent 1cd3c4bafb
commit 322cde70b9
5 changed files with 215 additions and 2 deletions
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test/unit_test/static/quantity_test.cpp
+23 -2
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@@ -238,14 +238,35 @@ static_assert(length<kilometre>(1500_q_m).number() == 1.5);
// derived quantities
///////////////////////////////////////
template<Representation Rep, units::Quantity Q, const units::basic_fixed_string additional_nttp_argument>
template<Representation Rep, Quantity Q, const basic_fixed_string additional_nttp_argument>
struct derived_quantity : quantity<typename Q::dimension, typename Q::unit, Rep> {
using dimension = typename Q::dimension;
using unit = typename Q::unit;
using rep = Rep;
using R = quantity<dimension, unit, Rep>;
constexpr derived_quantity() : R(){};
constexpr explicit(!std::is_trivial_v<Rep>) derived_quantity(const R& t) : R(t) {}
constexpr explicit(!std::is_trivial_v<Rep>) derived_quantity(R&& t) : R(std::move(t)) {}
constexpr derived_quantity& operator=(const R& t) { R::operator=(t); return *this; }
constexpr derived_quantity& operator=(R&& t) { R::operator=(std::move(t)); return *this; }
constexpr operator R&() & noexcept { return *this; }
constexpr operator const R&() const & noexcept { return *this; }
constexpr operator R&&() && noexcept { return *this; }
constexpr operator const R&&() const && noexcept { return *this; }
};
static_assert(units::detail::is_quantity<derived_quantity<double, si::length<metre>, "NTTP type description">>);
static_assert(detail::is_quantity<derived_quantity<double, si::length<metre>, "NTTP type description">>);
constexpr isq::Length auto get_length_derived_quantity() noexcept {
derived_quantity<double, si::length<metre>, "NTTP type description"> a;
a += 1_q_m;
a = a + 1_q_m;
a *= 0.5;
return a;
}
static_assert(get_length_derived_quantity() == 1_q_m);
/////////
// CTAD