mp_units::isnan

Synopsis

Declared in <mp-units/math.h>

template<
    auto R,
    typename Rep>
requires requires(Rep v) { isnan(v); }
#if MP_UNITS_HOSTED
           || requires(Rep v) { std::isnan(v); }
[[nodiscard]]
constexpr
bool
isnan(quantity<R, Rep> const& a) noexcept;