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feat: point_from extended with the case of the same origin

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This commit is contained in:
Mateusz Pusz
2023-08-02 11:20:32 +02:00
parent c289bbcfdb
commit ccdf5d319a
2 changed files with 9 additions and 1 deletions
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4
src/core/include/mp-units/quantity_point.h
View File

@@ -142,7 +142,9 @@ public:
template<PointOriginFor<quantity_spec> NewPO>
[[nodiscard]] constexpr QuantityPointOf<NewPO{}> auto point_from(NewPO origin) const
{
if constexpr (detail::is_derived_from_specialization_of_relative_point_origin<NewPO>) {
if constexpr (std::is_same_v<NewPO, std::remove_const_t<decltype(point_origin)>>) {
return *this;
} else if constexpr (detail::is_derived_from_specialization_of_relative_point_origin<NewPO>) {
auto q = absolute() - origin.quantity_point.absolute();
return quantity_point<reference, NewPO{}, typename decltype(q)::rep>(std::move(q));
} else {

6
test/unit_test/static/quantity_point_test.cpp
View File

@@ -410,12 +410,15 @@ static_assert(quantity_point<isq::height[m], tower_peak>(quantity_point<isq::hei
static_assert(quantity_point<isq::height[m], tower_peak>(quantity_point<isq::height[m], ground_level>(84 * m))
.relative() == 42 * m);
static_assert(quantity_point<isq::height[m], mean_sea_level>(42 * m).point_from(mean_sea_level).relative() == 42 * m);
static_assert(quantity_point<isq::height[m], ground_level>(42 * m).point_from(mean_sea_level).relative() == 84 * m);
static_assert(quantity_point<isq::height[m], tower_peak>(42 * m).point_from(mean_sea_level).relative() == 126 * m);
static_assert(quantity_point<isq::height[m], ground_level>(84 * m).point_from(ground_level).relative() == 84 * m);
static_assert(quantity_point<isq::height[m], mean_sea_level>(84 * m).point_from(ground_level).relative() == 42 * m);
static_assert(quantity_point<isq::height[m], tower_peak>(42 * m).point_from(ground_level).relative() == 84 * m);
static_assert(quantity_point<isq::height[m], tower_peak>(42 * m).point_from(tower_peak).relative() == 42 * m);
static_assert(quantity_point<isq::height[m], mean_sea_level>(42 * m).point_from(tower_peak).relative() == -42 * m);
static_assert(quantity_point<isq::height[m], ground_level>(84 * m).point_from(tower_peak).relative() == 42 * m);
@@ -448,12 +451,15 @@ static_assert(quantity_point<isq::height[m], tower_peak>(quantity_point<isq::hei
static_assert(quantity_point<isq::height[m], tower_peak>(quantity_point<isq::height[m], ground_level>(84 * m))
.absolute() == 126 * m);
static_assert(quantity_point<isq::height[m], mean_sea_level>(42 * m).point_from(mean_sea_level).absolute() == 42 * m);
static_assert(quantity_point<isq::height[m], ground_level>(42 * m).point_from(mean_sea_level).absolute() == 84 * m);
static_assert(quantity_point<isq::height[m], tower_peak>(42 * m).point_from(mean_sea_level).absolute() == 126 * m);
static_assert(quantity_point<isq::height[m], ground_level>(42 * m).point_from(ground_level).absolute() == 84 * m);
static_assert(quantity_point<isq::height[m], mean_sea_level>(84 * m).point_from(ground_level).absolute() == 84 * m);
static_assert(quantity_point<isq::height[m], tower_peak>(42 * m).point_from(ground_level).absolute() == 126 * m);
static_assert(quantity_point<isq::height[m], tower_peak>(42 * m).point_from(tower_peak).absolute() == 126 * m);
static_assert(quantity_point<isq::height[m], mean_sea_level>(42 * m).point_from(tower_peak).absolute() == 42 * m);
static_assert(quantity_point<isq::height[m], ground_level>(84 * m).point_from(tower_peak).absolute() == 126 * m);