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refactor(example): hello_units refactored

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Mateusz Pusz
2022-11-30 18:36:16 +01:00
parent 75ef2713d6
commit e7fff94d7c
1 changed files with 18 additions and 22 deletions
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40
example/hello_units.cpp
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@ -21,36 +21,32 @@
// SOFTWARE.
#include <units/format.h>
#include <units/isq/si/international/length.h>
#include <units/isq/si/international/speed.h> // IWYU pragma: keep
#include <units/isq/si/length.h>
#include <units/isq/si/speed.h> // IWYU pragma: keep
#include <units/isq/si/time.h>
#include <units/isq/space_and_time.h>
#include <units/quantity_io.h>
#include <units/si/international/length.h>
#include <units/si/international/speed.h>
#include <units/si/unit_symbols.h>
#include <iostream>
using namespace units::isq;
using namespace units;
constexpr Speed auto avg_speed(Length auto d, Time auto t) { return d / t; }
constexpr quantity_of<isq::speed> auto avg_speed(quantity_of<isq::length> auto d, quantity_of<isq::time> auto t)
{
return quantity_cast<isq::speed>(d / t);
}
int main()
{
using namespace units::isq::si::literals;
using namespace units::isq::si::references;
using namespace units::aliases::isq::si::international;
using namespace units::si::unit_symbols;
using namespace units::si::international::unit_symbols;
constexpr Speed auto v1 = 110 * (km / h);
constexpr Speed auto v2 = mi_per_h<>(70.);
constexpr Speed auto v3 = avg_speed(220_q_km, 2_q_h);
constexpr Speed auto v4 = avg_speed(si::length<si::international::mile>(140), si::time<si::hour>(2));
#if UNITS_DOWNCAST_MODE == 0
constexpr Speed auto v5 = quantity_cast<si::speed<si::metre_per_second>>(v3);
constexpr Speed auto v6 = quantity_cast<si::dim_speed, si::metre_per_second>(v4);
#else
constexpr Speed auto v5 = quantity_cast<si::speed<si::metre_per_second>>(v3);
constexpr Speed auto v6 = quantity_cast<si::metre_per_second>(v4);
#endif
constexpr Speed auto v7 = quantity_cast<int>(v6);
constexpr auto v1 = 110 * isq::speed[km / h];
constexpr auto v2 = 70. * isq::speed[mph];
constexpr auto v3 = avg_speed(220 * isq::length[km], 2 * isq::time[h]);
constexpr auto v4 = avg_speed(quantity<isq::length[mi]>{140}, quantity<isq::time[h]>{2});
constexpr auto v5 = quantity_cast<quantity<isq::speed[m / s]>>(v3);
constexpr auto v6 = quantity_cast<m / s>(v4);
constexpr auto v7 = quantity_cast<int>(v6);
std::cout << v1 << '\n'; // 110 km/h
std::cout << v2 << '\n'; // 70 mi/h