[#boost-urls-authority_rule]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::authority_rule
:relfileprefix: ../../
:mrdocs:


Rule for authority

== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/rfc/authority_rule.hpp#L93[boost/url/rfc/authority_rule.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr /* implementation-defined */::xref:boost/urls/implementation_defined/authority_rule_t.adoc[authority_rule_t] authority_rule = {};
----

== Description



=== Value Type

[,cpp]
----
using value_type = authority_view;
----

=== Example

Rules are used with the function xref:boost/urls/grammar/parse-02.adoc[grammar::parse].

[,cpp]
----
system::result< authority_view > rv = grammar::parse( "user:pass@example.com:8080", authority_rule );
----

=== BNF

[,cpp]
----
authority   = [ userinfo "@" ] host [ ":" port ]
----

=== Specification

* link:https://datatracker.ietf.org/doc/html/rfc3986#section-3.2[3&period;2&period; Authority (rfc3986)]



== See Also


xref:boost/urls/authority_view.adoc[authority&lowbar;view],        xref:boost/urls/grammar/parse-02.adoc[grammar&colon;&colon;parse],        xref:boost/urls/parse_authority.adoc[parse&lowbar;authority]&period;






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