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refactor(example): quantity_point support added to currency example

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Mateusz Pusz
2023-05-14 13:32:12 +02:00
parent eaca8d073a
commit 4209ac20fc
1 changed files with 15 additions and 8 deletions
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23
example/currency.cpp
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@@ -22,6 +22,7 @@
#include <mp_units/iostream.h>
#include <mp_units/quantity.h>
#include <mp_units/quantity_point.h>
#include <iostream>
#include <map>
@@ -68,17 +69,23 @@ double exchange_rate()
#endif
template<ReferenceOf<currency> auto To>
quantity<To, int> exchange_to(QuantityOf<currency> auto q)
template<ReferenceOf<currency> auto To, ReferenceOf<currency> auto From, typename Rep>
quantity<To, Rep> exchange_to(quantity<From, Rep> q)
{
return static_cast<int>(exchange_rate<q.unit, get_unit(To)>() * q.number()) * euro;
return static_cast<Rep>(exchange_rate<q.unit, get_unit(To)>() * q.number()) * To;
}
template<ReferenceOf<currency> auto To, ReferenceOf<currency> auto From, auto PO, typename Rep>
quantity_point<To, PO, Rep> exchange_to(quantity_point<From, PO, Rep> q)
{
return static_cast<Rep>(exchange_rate<q.unit, get_unit(To)>() * q.absolute().number()) * To;
}
int main()
{
auto price_usd = 100 * us_dollar;
auto price_euro = exchange_to<euro>(price_usd);
auto price_usd = quantity_point{100 * us_dollar};
auto price_euro = quantity_point{exchange_to<euro>(price_usd)};
std::cout << price_usd << " -> " << price_euro << "\n";
// std::cout << price_usd + price_euro << "\n"; // does not compile
}
std::cout << price_usd.absolute() << " -> " << price_euro.absolute() << "\n";
// std::cout << price_usd.absolute() + price_euro.absolute() << "\n"; // does not compile
}