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xo-unit: + unary Quantity.operator-

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Roland Conybeare 2024-04-27 11:10:55 -04:00
commit 8d1bdf5463
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4
include/xo/unit/Quantity.hpp
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@ -195,6 +195,10 @@ namespace xo {
return x.scale() <=> y2.scale();
}
Quantity operator-() const {
return Quantity(-scale_, unit_);
}
/* also works with Quantity2 = double, int, .. */
template <typename Quantity2>
Quantity & operator*= (const Quantity2 & x) {