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xo-unit: ex1: upgrade to qty::quantity<..> with constexpr units

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This commit is contained in:
Roland Conybeare 2024-05-03 01:38:21 -04:00
commit 8f7d60dd21
2 changed files with 16 additions and 8 deletions
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1
example/ex1/CMakeLists.txt
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@ -10,6 +10,7 @@ xo_include_options2(${SELF_EXE})
# dependencies..
xo_self_headeronly_dependency(${SELF_EXE} xo_unit)
xo_dependency(${SELF_EXE} xo_flatstring)
#xo_dependency(${SELF_EXE} reflect)
# end CMakeLists.txt

23
example/ex1/ex1.cpp
View file

@ -1,22 +1,29 @@
/** @file ex1.cpp **/
#include "xo/unit/mpl/quantity.hpp"
#include "xo/unit/quantity.hpp"
#include "xo/unit/quantity_iostream.hpp"
#include <iostream>
int
main () {
namespace u = xo::unit::units;
namespace qty = xo::unit::qty;
using xo::unit::quantity;
namespace q = xo::qty::qty;
using xo::qty::quantity;
using namespace std;
auto t = qty::milliseconds(10);
auto m = qty::kilograms(2.5);
auto a = m / (t*t);
constexpr auto t = q::milliseconds(10);
constexpr auto m = q::kilograms(2.5);
constexpr auto t2 = t*t;
#ifdef NOT_YET
constexpr auto a = m / (t*t);
static_assert(same_as<decltype(t), quantity<u::millisecond, int>>);
#endif
cerr << "t: " << t << ", m: " << m << ", m.t^-2: " << a << endl;
cerr << "t: " << t << ", m: " << m
<< ", t^2: " << t2
//<< ", m.t^-2: " << a
<< endl;
}
/** end ex1.cpp **/