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Return the port.
std::uint16_t port_number() const;
If a port is present and the numerical value is representable, it is returned as an unsigned integer. Otherwise, the number zero is returned.
assert( [link url.ref.boost__urls__url_view_base.url_view `url_view`]( "http://localhost.com:8080" ).[link url.ref.boost__urls__url.port_number `port_number`]() == 8080 );
Constant.
Throws nothing.
[link url.ref.boost__urls__url.port `port`] = *DIGIT