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xo-unit: refactor: move .hpp files to mpl/

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Roland Conybeare 2024-04-22 15:30:17 -04:00
commit 755224743e
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86
include/xo/unit/basis_unit.hpp
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/** @file basis_unit.hpp **/
#include "dim_util.hpp"
#include "ratio_util.hpp"
namespace xo {
namespace unit {
/** @class basis_unit
*
* @brief A dimensionless multiple with natively-specified (i.e. at compile-time) dimension
**/
template <dim BasisDim,
native_unit_id NativeUnitId = native_unit_for_v<BasisDim>,
typename InnerScale = std::ratio<1>>
struct basis_unit {
static_assert(ratio_concept<InnerScale>);
static constexpr dim c_native_dim = BasisDim;
static constexpr basis_unit c_native_unit = NativeUnitId;
using scalefactor_type = InnerScale;
};
/** Using struct wrapper so we can partially specialize
* Specializations in [dimension.hpp], see also
**/
template <dim dim_id>
struct native_unit_abbrev_helper;
template <>
struct native_unit_abbrev_helper<dim::mass> {
static constexpr auto value = stringliteral("g");
};
template <>
struct native_unit_abbrev_helper<dim::distance> {
static constexpr auto value = stringliteral("m");
};
template <>
struct native_unit_abbrev_helper<dim::time> {
static constexpr auto value = stringliteral("s");
};
template<>
struct native_unit_abbrev_helper<dim::currency> {
static constexpr auto value = stringliteral("ccy");
};
template<>
struct native_unit_abbrev_helper<dim::price> {
static constexpr auto value = stringliteral("px");
};
template<dim BasisDim>
constexpr auto native_unit_abbrev_v = native_unit_abbrev_helper<BasisDim>::value;
namespace units {
// ----- scaled_native_unit_abbrev_helper -----
/* Require: InnerScale is ratio type; InnerScale >= 1 */
template <dim BasisDim, typename InnerScale>
struct scaled_native_unit_abbrev;
template <dim BasisDim>
struct scaled_native_unit_abbrev<BasisDim, std::ratio<1>> {
static constexpr auto value = native_unit_abbrev_v<BasisDim>;
};
template <dim BasisDim, typename InnerScale>
struct scaled_native_unit_abbrev {
/* e.g. unit of '1000 grams' will have abbrev '1000g' in absence
* of a specialization for scaled_native_unit_abbrev
*/
static constexpr auto value = stringliteral_concat(stringliteral_from_ratio<InnerScale>().value_,
native_unit_abbrev_helper<BasisDim>::value.value_);
};
template <dim BasisDim, typename InnerScale>
constexpr auto scaled_native_unit_abbrev_v = scaled_native_unit_abbrev<BasisDim, InnerScale>::value;
}
} /*namespace unit*/
} /*namespace xo*/
/** end basis_unit.hpp **/