boost/container
2
0
Fork 0
mirror of https://github.com/boostorg/container.git synced 2026-01-19 04:02:17 +00:00
Code Issues Projects Releases Wiki Activity

Add compile time log2_pow2

Browse Source
This commit is contained in:
Ion Gaztañaga
2026-01-12 23:04:42 +01:00
parent ee1c553a67
commit b0d7141c0c
1 changed files with 12 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
include/boost/container/detail/math_functions.hpp
View File

@@ -167,6 +167,18 @@ struct lcm_ct
BOOST_STATIC_CONSTEXPR std::size_t value = I1 * I2 / gcd_ct<I1, I2>::value;
};
template <std::size_t N, std::size_t Count = 0>
struct log2_pow2
{
BOOST_STATIC_CONSTEXPR std::size_t value = log2_pow2<(N >> 1), Count + 1>::value;
};
// Base case: we've reached 1
template <std::size_t Count>
struct log2_pow2<1, Count> {
BOOST_STATIC_CONSTEXPR std::size_t value = Count;
};
} // namespace dtl
} // namespace container
} // namespace boost