| Defined in header |
template< class T > constexpr T floor2(T x) noexcept;
x is not zero, calculates the largest integral power of two that is not greater than
x is zero, returns zero.
This overload only participates in overload resolution if
T is an unsigned integer type (that is,
unsigned long long, or an extended unsigned integer type).
x is zero; otherwise, the largest integral power of two that is not greater than
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