forked from mpusz/mp-units
Units and dimensions redesigned
This commit is contained in:
Mateusz Pusz
@@ -20,174 +20,36 @@
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#include <units/dimensions/acceleration.h>
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#include <units/dimensions/area.h>
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#include <units/dimensions/capacitance.h>
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#include <units/dimensions/current.h>
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#include <units/dimensions/electric_charge.h>
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#include <units/dimensions/energy.h>
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#include <units/dimensions/force.h>
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#include <units/dimensions/frequency.h>
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#include <units/dimensions/length.h>
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#include <units/dimensions/luminous_intensity.h>
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#include <units/dimensions/mass.h>
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#include <units/dimensions/power.h>
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#include <units/dimensions/pressure.h>
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#include <units/dimensions/substance.h>
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#include <units/dimensions/surface_tension.h>
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#include <units/dimensions/temperature.h>
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#include <units/dimensions/time.h>
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#include <units/dimensions/velocity.h>
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#include <units/dimensions/voltage.h>
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#include <units/dimensions/volume.h>
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#include <utility>
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#include "units/unit.h"
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#include "units/physical/si/prefixes.h"
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namespace {
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using namespace units;
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using namespace units;
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/* ************** BASE DIMENSIONS **************** */
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struct metre : named_unit<metre, "m", si::prefix> {};
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struct centimetre : prefixed_unit<centimetre, si::centi, metre> {};
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struct kilometre : prefixed_unit<kilometre, si::kilo, metre> {};
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struct yard : scaled_unit<yard, "yd", no_prefix, ratio<9'144, 10'000>, metre> {};
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struct foot : scaled_unit<foot, "ft", no_prefix, ratio<1, 3>, yard> {};
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struct dim_length : base_dimension<"length", metre> {};
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// length
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struct second : named_unit<second, "s", si::prefix> {};
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struct hour : scaled_unit<hour, "h", no_prefix, ratio<3600>, second> {};
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struct dim_time : base_dimension<"time", second> {};
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static_assert(1km == 1000m);
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static_assert(1m == 100cm);
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static_assert(1m == 1000mm);
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static_assert(1km + 1m == 1001m);
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static_assert(10km / 5km == 2);
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static_assert(100mm / 5cm == 2);
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static_assert(10km / 2 == 5km);
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struct metre_per_second : unit<metre_per_second> {};
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struct dim_velocity : derived_dimension<dim_velocity, metre_per_second, exp<dim_length, 1>, exp<dim_time, -1>> {};
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struct kilometre_per_hour : deduced_unit<kilometre_per_hour, dim_velocity, kilometre, hour> {};
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static_assert(1yd == 0.9144m);
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static_assert(1yd == 3ft);
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static_assert(1ft == 12in);
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static_assert(1mi == 1760yd);
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static_assert(std::is_same_v<downcast<detail::reference_unit<metre, ratio<1>>>, metre>);
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static_assert(std::is_same_v<downcast<detail::reference_unit<metre, ratio<1, 100>>>, centimetre>);
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static_assert(std::is_same_v<downcast<detail::reference_unit<metre, ratio<yard::ratio::num, yard::ratio::den>>>, yard>);
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static_assert(std::is_same_v<downcast<detail::reference_unit<metre, ratio_multiply<typename yard::ratio, ratio<1, 3>>>>, foot>);
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static_assert(std::is_same_v<downcast<detail::reference_unit<metre_per_second, ratio_divide<typename kilometre::ratio, typename hour::ratio>>>, kilometre_per_hour>);
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static_assert(5in + 8cm == 207mm);
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static_assert(millimetre::symbol == "mm");
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static_assert(centimetre::symbol == "cm");
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static_assert(kilometre::symbol == "km");
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// mass
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static_assert(1kg == 1000g);
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static_assert(kilogram::symbol == "kg");
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// time
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static_assert(1h == 3600s);
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static_assert(nanosecond::symbol == "ns");
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static_assert(microsecond::symbol == "µs");
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static_assert(millisecond::symbol == "ms");
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// current
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// temperature
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// substance
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// luminous intensity
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/* ************** DERIVED DIMENSIONS WITH NAMED UNITS **************** */
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// frequency
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static_assert(2 / 1s == 2Hz);
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static_assert(120 / 1min == 2Hz);
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static_assert(1000 / 1s == 1kHz);
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static_assert(1 / 1ms == 1kHz);
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static_assert(3.2GHz == 3'200'000'000Hz);
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static_assert(10Hz * 1min == 600);
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static_assert(millihertz::symbol == "mHz");
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static_assert(kilohertz::symbol == "kHz");
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static_assert(megahertz::symbol == "MHz");
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static_assert(gigahertz::symbol == "GHz");
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static_assert(terahertz::symbol == "THz");
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// force
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static_assert(10kg * 10mps_sq == 100N);
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// pressure
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static_assert(10N / 10sq_m == 1Pa);
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// energy
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static_assert(10N * 10m == 100_J);
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static_assert(10Pa * 10cub_m == 100_J);
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// power
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static_assert(10_J / 10s == 1W);
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// electric charge
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static_assert(10A * 10s == 100C);
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// voltage
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static_assert(10W / 10A == 1V);
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static_assert(10_J / 10C == 1V);
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// capacitance
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static_assert(10C / 10V == 1F);
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/* ************** DERIVED DIMENSIONS IN TERMS OF BASE UNITS **************** */
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// velocity
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static_assert(std::is_same_v<decltype(1km / 1s), quantity<unit<velocity, ratio<1000, 1>>, std::int64_t>>);
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static_assert(10m / 5s == 2mps);
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static_assert(10 / 5s * 1m == 2mps);
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static_assert(1km / 1s == 1000mps);
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// static_assert(1km / 1h == 1kmph); // should not compile
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static_assert(1.0km / 1h == 1kmph);
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static_assert(1000.0m / 3600.0s == 1kmph);
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static_assert(10.0mi / 2h == 5mph);
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static_assert(2kmph * 2h == 4km);
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// static_assert(2kmph * 15min == 500m); // should not compile
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static_assert(2kmph * 15.0min == 500m);
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static_assert(2.0kmph * 15min == 500m);
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static_assert(2km / 2kmph == 1h);
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// static_assert(2000m / 2kmph == 1h); // should not compile
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static_assert(quantity_cast<quantity<kilometre, int>>(2000m) / 2kmph == 1h);
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// static_assert(metre_per_second::symbol == basic_fixed_string("m/s"));
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// static_assert(kilometre_per_hour::symbol == basic_fixed_string("km/h"));
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// acceleration
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static_assert(10mps / 10s == 1mps_sq);
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// area
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static_assert(1m * 1m == 1sq_m);
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static_assert(10km * 10km == 100sq_km);
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static_assert(1sq_m == 10'000sq_cm);
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// volume
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static_assert(1m * 1m * 1m == 1cub_m);
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static_assert(10sq_m * 10m == 100cub_m);
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static_assert(10km * 10km * 10km == 1000cub_km);
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static_assert(1cub_m == 1'000'000cub_cm);
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/* ************** DERIVED DIMENSIONS IN TERMS OF OTHER UNITS **************** */
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static_assert(10N / 2m == 5Npm);
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static_assert(centimetre::symbol == "cm");
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static_assert(kilometre::symbol == "km");
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static_assert(kilometre_per_hour::symbol == "");
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} // namespace
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