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feat: quantity_point compound assignment now preserves the value category

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Mateusz Pusz
2023-09-13 20:06:17 +02:00
parent 2e26eed59d
commit 2b3c9a6afa
1 changed files with 12 additions and 8 deletions
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20
src/core/include/mp-units/quantity_point.h
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@@ -224,18 +224,22 @@ public:
}
// compound assignment operators
constexpr quantity_point& operator+=(const quantity_type& q)
requires requires { quantity_from_origin_ += q; }
template<typename QP>
requires std::derived_from<std::remove_cvref_t<QP>, quantity_point> &&
requires(quantity_type q) { quantity_from_origin_ += q; }
friend constexpr decltype(auto) operator+=(QP&& qp, const quantity_type& q)
{
quantity_from_origin_ += q;
return *this;
qp.quantity_from_origin_ += q;
return std::forward<QP>(qp);
}
constexpr quantity_point& operator-=(const quantity_type& q)
requires requires { quantity_from_origin_ -= q; }
template<typename QP>
requires std::derived_from<std::remove_cvref_t<QP>, quantity_point> &&
requires(quantity_type q) { quantity_from_origin_ -= q; }
friend constexpr decltype(auto) operator-=(QP&& qp, const quantity_type& q)
{
quantity_from_origin_ -= q;
return *this;
qp.quantity_from_origin_ -= q;
return std::forward<QP>(qp);
}
private: