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git subrepo clone git@github.com:Rconybea/xo-unit.git xo-unit

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subrepo:
  subdir:   "xo-unit"
  merged:   "f1e698bf"
upstream:
  origin:   "git@github.com:Rconybea/xo-unit.git"
  branch:   "main"
  commit:   "f1e698bf"
git-subrepo:
  version:  "0.4.9"
  origin:   "???"
  commit:   "???"
This commit is contained in:
Roland Conybeare 2026-06-06 22:22:52 -04:00
commit 60f796b770
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49
xo-unit/example/ex2/ex2.cpp Normal file
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/** @file ex2.cpp **/
#include "xo/unit/quantity.hpp"
#include "xo/unit/quantity_iostream.hpp"
#include <iostream>
int
main () {
namespace q = xo::qty::qty;
namespace u = xo::qty::u;
using xo::qty::with_units_from;
using xo::qty::with_units;
using xo::qty::quantity;
using xo::flatstring;
using namespace std;
constexpr auto t = q::minutes(2);
constexpr auto d = q::kilometers(2.5);
constexpr auto t2 = t*t;
constexpr auto a = d / (t*t);
cerr << "t: " << t << ", d: " << d
<< ", t^2: " << t2
<< ", d.t^-2: " << a
<< endl;
constexpr auto a2 = a.rescale_ext<u::meter / (u::second * u::second)>();
static_assert(a2.abbrev() == flatstring("m.s^-2"));
cerr << "a2: " << a2 << endl;
constexpr auto a3 = with_units<u::meter / (u::second * u::second)>(a);
static_assert(a3.abbrev() == flatstring("m.s^-2"));
cerr << "a3: " << a3 << endl;
constexpr auto au = q::meter / (q::second * q::second);
constexpr auto a4 = with_units_from(a, au);
static_assert(a4.abbrev() == flatstring("m.s^-2"));
cerr << "a4: " << a4 << endl;
}
/** end ex2.cpp **/