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

Move constructor.

basic_fields(
    basic_fields&&,
    Allocator const& alloc);

The state of the moved-from object is as if constructed using the same allocator.

Name	Description
`alloc`	The allocator to use.