mp_units::operator‐

[[nodiscard]]
constexpr
constrained<decltype(‐std::declval<T>()), ErrorPolicy>
operator‐(constrained const& x);

[[nodiscard]]
constexpr
safe_int</* implementation-defined */, ErrorPolicy>
operator‐(
    U lhs,
    safe_int rhs);

[[nodiscard]]
constexpr
auto
operator‐(
    U lhs,
    safe_int rhs)
requires requires { lhs ‐ static_cast<U>(rhs.value_); };

[[nodiscard]]
constexpr
safe_int</* implementation-defined */, ErrorPolicy>
operator‐(
    safe_int lhs,
    U rhs);

[[nodiscard]]
constexpr
auto
operator‐(
    safe_int lhs,
    U rhs)
requires requires { static_cast<U>(lhs.value_) ‐ rhs; };

[[nodiscard]]
constexpr
safe_int</* implementation-defined */, ErrorPolicy>
operator‐(
    safe_int lhs,
    safe_int rhs);

[[nodiscard]]
constexpr
safe_int</* implementation-defined */, ErrorPolicy>
operator‐(
    safe_int lhs,
    constrained<U, CP> rhs);

[[nodiscard]]
constexpr
constrained<decltype(std::declval<T>() ‐ std::declval<U>()), CP>
operator‐(
    safe_int lhs,
    constrained<U, CP> const& rhs);

[[nodiscard]]
constexpr
safe_int</* implementation-defined */, ErrorPolicy>
operator‐(
    constrained<U, CP> lhs,
    safe_int rhs);

[[nodiscard]]
constexpr
constrained<decltype(std::declval<U>() ‐ std::declval<T>()), CP>
operator‐(
    constrained<U, CP> const& lhs,
    safe_int rhs);