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

Assign from another address.

address_v6 & operator=(
    const address_v6 & other);
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Move-assign from another address.

address_v6 & operator=(
    address_v6 && other);
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