forked from mpusz/mp-units
feat: PrefixableUnit concept introduced
This commit is contained in:
Mateusz Pusz
@@ -34,16 +34,16 @@ inline constexpr struct activity : system_reference<activity_dim, si::becquerel>
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// check for invalid prefixes
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template<Unit auto V1>
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concept can_not_be_prefixed = !requires { typename si::milli_<V1>; };
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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::degree_Celsius>);
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static_assert(can_not_be_prefixed<si::minute>);
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static_assert(can_not_be_prefixed<si::hour>);
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static_assert(can_not_be_prefixed<si::day>);
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static_assert(can_not_be_prefixed<si::kilogram>);
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static_assert(can_not_be_prefixed<si::hectare>);
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static_assert(can_not_be_prefixed<si::metre / si::second>);
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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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// Named quantity/dimension and unit
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static_assert(
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@@ -92,6 +92,9 @@ concept NamedUnit = Unit<T> && requires(T* t) { detail::to_base_specialization_o
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template<Unit auto V>
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inline constexpr bool unit_can_be_prefixed = NamedUnit<std::remove_const_t<decltype(V)>>;
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template<typename T>
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concept PrefixableUnit = NamedUnit<T> && unit_can_be_prefixed<T{}>;
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/**
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* @brief A prefixed unit
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*
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@@ -103,8 +106,7 @@ inline constexpr bool unit_can_be_prefixed = NamedUnit<std::remove_const_t<declt
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* @tparam P prefix to be appied to the coherent_unit unit
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* @tparam U coherent_unit unit
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*/
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template<basic_symbol_text Symbol, Magnitude auto M, NamedUnit auto U>
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requires unit_can_be_prefixed<U>
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template<basic_symbol_text Symbol, Magnitude auto M, PrefixableUnit auto U>
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struct prefixed_unit : std::remove_const_t<decltype(M * U)> {
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static constexpr auto symbol = Symbol + U.symbol;
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};
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@@ -26,86 +26,86 @@
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namespace units::si {
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct yocto_ : prefixed_unit<"y", mag_power<10, -24>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct zepto_ : prefixed_unit<"z", mag_power<10, -21>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct atto_ : prefixed_unit<"a", mag_power<10, -18>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct femto_ : prefixed_unit<"f", mag_power<10, -15>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct pico_ : prefixed_unit<"p", mag_power<10, -12>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct nano_ : prefixed_unit<"n", mag_power<10, -9>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct micro_ : prefixed_unit<basic_symbol_text{"\u00b5", "u"}, mag_power<10, -6>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct milli_ : prefixed_unit<"m", mag_power<10, -3>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct centi_ : prefixed_unit<"c", mag_power<10, -2>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct deci_ : prefixed_unit<"d", mag_power<10, -1>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct deca_ : prefixed_unit<"da", mag_power<10, 1>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct hecto_ : prefixed_unit<"h", mag_power<10, 2>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct kilo_ : prefixed_unit<"k", mag_power<10, 3>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct mega_ : prefixed_unit<"M", mag_power<10, 6>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct giga_ : prefixed_unit<"G", mag_power<10, 9>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct tera_ : prefixed_unit<"T", mag_power<10, 12>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct peta_ : prefixed_unit<"P", mag_power<10, 15>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct exa_ : prefixed_unit<"E", mag_power<10, 18>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct zetta_ : prefixed_unit<"Z", mag_power<10, 21>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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struct yotta_ : prefixed_unit<"Y", mag_power<10, 24>, U> {};
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr yocto_<U> yocto;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr zepto_<U> zepto;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr atto_<U> atto;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr femto_<U> femto;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr pico_<U> pico;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr nano_<U> nano;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr micro_<U> micro;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr milli_<U> milli;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr centi_<U> centi;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr deci_<U> deci;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr deca_<U> deca;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr hecto_<U> hecto;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr kilo_<U> kilo;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr mega_<U> mega;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr giga_<U> giga;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr tera_<U> tera;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr peta_<U> peta;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr exa_<U> exa;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr zetta_<U> zetta;
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template<NamedUnit auto U>
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template<PrefixableUnit auto U>
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inline constexpr yotta_<U> yotta;
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} // namespace units::si
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