Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is an older version of Boost and was released in 2018. The current version is 1.90.0.

http::basic_fields::basic_fields (7 of 8 overloads)

http::basic_fields::basic_fields (7 of 8 overloads)

Copy constructor.

template<
    class OtherAlloc>
basic_fields(
    basic_fields< OtherAlloc > const&);