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NTTP ratio support added (resolves #49)

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Mateusz Pusz committed 2020-06-27 19:15:46 +02:00
1 parent 03facbefd2
commit d171f5451e
47 files changed
+504 -664
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src/include/units/unit.h
+13 -10
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@@ -47,16 +47,19 @@ namespace units {
* (i.e. all length units are expressed in terms of meter, all mass units are expressed in
* terms of gram, ...)
*
* @tparam U a unit to use as a reference for this dimension
* @tparam R a ratio of a reference unit
* @tparam U a unit to use as a reference for this dimension
*/
template<UnitRatio R, typename U>
template<ratio R, typename U>
requires UnitRatio<R>
struct scaled_unit : downcast_base<scaled_unit<R, U>> {
using ratio = R;
static constexpr ::units::ratio ratio = R;
using reference = U;
};
template<Dimension D, UnitRatio R>
template<Dimension D, auto R>
// template<Dimension D, ratio R> // TODO: GCC crash!!!
requires UnitRatio<R>
using downcast_unit = downcast<scaled_unit<R, typename dimension_unit<D>::reference>>;
template<Unit U1, Unit U2>
@@ -71,7 +74,7 @@ struct same_unit_reference : std::is_same<typename U1::reference, typename U2::r
* @tparam Child inherited class type used by the downcasting facility (CRTP Idiom)
*/
template<typename Child>
struct unit : downcast_child<Child, scaled_unit<ratio<1>, Child>> {
struct unit : downcast_child<Child, scaled_unit<ratio(1), Child>> {
static constexpr bool is_named = false;
using prefix_family = no_prefix;
};
@@ -96,7 +99,7 @@ struct unknown_coherent_unit : unit<unknown_coherent_unit> {};
* @tparam PF no_prefix or a type of prefix family
*/
template<typename Child, basic_symbol_text Symbol, PrefixFamily PF>
struct named_unit : downcast_child<Child, scaled_unit<ratio<1>, Child>> {
struct named_unit : downcast_child<Child, scaled_unit<ratio(1), Child>> {
static constexpr bool is_named = true;
static constexpr auto symbol = Symbol;
using prefix_family = PF;
@@ -116,8 +119,9 @@ struct named_unit : downcast_child<Child, scaled_unit<ratio<1>, Child>> {
* @tparam R a scale to apply to U
* @tparam U a reference unit to scale
*/
template<typename Child, basic_symbol_text Symbol, PrefixFamily PF, UnitRatio R, Unit U>
struct named_scaled_unit : downcast_child<Child, scaled_unit<ratio_multiply<R, typename U::ratio>, typename U::reference>> {
template<typename Child, basic_symbol_text Symbol, PrefixFamily PF, ratio R, Unit U>
requires UnitRatio<R>
struct named_scaled_unit : downcast_child<Child, scaled_unit<R * U::ratio, typename U::reference>> {
static constexpr bool is_named = true;
static constexpr auto symbol = Symbol;
using prefix_family = PF;
@@ -136,8 +140,7 @@ struct named_scaled_unit : downcast_child<Child, scaled_unit<ratio_multiply<R, t
*/
template<typename Child, Prefix P, Unit U>
requires U::is_named && std::same_as<typename P::prefix_family, typename U::prefix_family>
struct prefixed_unit :
downcast_child<Child, scaled_unit<ratio_multiply<typename P::ratio, typename U::ratio>, typename U::reference>> {
struct prefixed_unit : downcast_child<Child, scaled_unit<P::ratio * U::ratio, typename U::reference>> {
static constexpr bool is_named = true;
static constexpr auto symbol = P::symbol + U::symbol;
using prefix_family = no_prefix;