d1/d5d/language_2bit-level_2all_8hpp_source.html

 #pragma once    // Source encoding: UTF-8 with BOM (π is a lowercase Greek "pi").

 #include <cppx-core/language/bit-level/bits_per_.hpp>
 #include <cppx-core/language/bit-level/intlog2.hpp>
 #include <cppx-core/language/bit-level/sum_of_bits.hpp>

 #include <c/stdint.hpp>                 // Mainly intN_t and uintN_t for N in {8, 16, 32, 64}
intlog2.hpp
intlog2, the position of the most significant bit in an unsigned value.

sum_of_bits.hpp
sum_of_bits, the number of 1-bits in a std::bitset or unsigned value.

bits_per_.hpp
bits_per_ and magnitude_bits_per_, plus the for-readability constant bits_per_byte.