Roland Conybeare
d1fa15f248
git-subtree-dir: xo-unit git-subtree-mainline:e9ee6992cagit-subtree-split:b531e382c2
49 lines
1.1 KiB
C++
49 lines
1.1 KiB
C++
/** @file ex2.cpp **/
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#include "xo/unit/quantity.hpp"
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#include "xo/unit/quantity_iostream.hpp"
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#include <iostream>
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int
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main () {
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namespace q = xo::qty::qty;
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namespace u = xo::qty::u;
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using xo::qty::with_units_from;
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using xo::qty::with_units;
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using xo::qty::quantity;
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using xo::flatstring;
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using namespace std;
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constexpr auto t = q::minutes(2);
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constexpr auto d = q::kilometers(2.5);
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constexpr auto t2 = t*t;
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constexpr auto a = d / (t*t);
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cerr << "t: " << t << ", d: " << d
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<< ", t^2: " << t2
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<< ", d.t^-2: " << a
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<< endl;
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constexpr auto a2 = a.rescale_ext<u::meter / (u::second * u::second)>();
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static_assert(a2.abbrev() == flatstring("m.s^-2"));
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cerr << "a2: " << a2 << endl;
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constexpr auto a3 = with_units<u::meter / (u::second * u::second)>(a);
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static_assert(a3.abbrev() == flatstring("m.s^-2"));
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cerr << "a3: " << a3 << endl;
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constexpr auto au = q::meter / (q::second * q::second);
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constexpr auto a4 = with_units_from(a, au);
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static_assert(a4.abbrev() == flatstring("m.s^-2"));
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cerr << "a4: " << a4 << endl;
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}
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/** end ex2.cpp **/
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