[P1956R1](https://wg21.link/P1956R1) `<bit>` `has_single_bit()`, `bit_ceil()`, `bit_floor()`, `bit_width()` Updated feature-test macro: `#define __cpp_lib_int_pow2 202002L` Implemented by #524.
P1956R1
<bit>has_single_bit(),bit_ceil(),bit_floor(),bit_width()Updated feature-test macro:
#define __cpp_lib_int_pow2 202002LImplemented by #524.