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xo-unit: + quantity methods .is_dimensionless(), arith conversion

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Roland Conybeare 2024-05-04 11:37:24 -04:00
commit cb7bd4d1f2
1 changed files with 9 additions and 1 deletions
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10
include/xo/unit/quantity.hpp
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@ -37,7 +37,9 @@ namespace xo {
constexpr const repr_type & scale() const { return scale_; }
constexpr const unit_type & unit() const { return s_unit; }
// is_dimensionless
constexpr bool is_dimensionless() const {
return s_unit.is_dimensionless();
}
// unit_qty
// zero_qty
@ -152,6 +154,12 @@ namespace xo {
return this->template rescale<Q2::s_unit>().template with_repr<typename Q2::repr_type>();
}
constexpr operator Repr() const
requires (NaturalUnit.is_dimensionless())
{
return scale_;
}
public: /* need public members so that a quantity instance can be a non-type template parameter (is a structural type) */
static constexpr natural_unit<ratio_int_type> s_unit = NaturalUnit;