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
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Obtain an address object that represents any address.
static address_v6 any();
This functions returns an address that represents the "any" address
::.
A default-constructed address_v6
object.