...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
The number of characters in the longest possible IPv6 string.
static constexpr std::size_t max_str_len = 49;
The longest IPv6 address is:
ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff