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 the documentation for a snapshot of the master branch, built from commit e186c3db46.

Assignment.

value&
operator=(
    std::nullptr_t) noexcept;

Replace *this with null.

No-throw guarantee.

Linear in the size of *this.