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##### static_url_base::port

(Inherited from `url_view_base`)

Return the port.

###### Synopsis

    core::string_view
    port() const;

###### Description

If present, this function returns a string representing the port (which may be empty). Otherwise it returns an empty string.

###### Example

    assert( url_view( "http://localhost.com:8080" ).port() == "8080" );

###### Complexity

Constant.

###### Exception Safety

Throws nothing.

###### BNF

    port        = *DIGIT

###### Specification

- 3.2.3. Port (rfc3986)

###### See Also

`encoded_host_and_port`, `has_port`, `port_number`.