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


Rule for URI

== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/rfc/uri_rule.hpp#L92[boost/url/rfc/uri_rule.hpp]>`

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

== Description



=== Value Type

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

=== Example

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

[,cpp]
----
system::result< url_view > rv = grammar::parse( "https://www.example.com/index.htm?id=guest#s1", uri_rule );
----

=== BNF

[,cpp]
----
URI           = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
----

=== Specification

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



== See Also


xref:boost/urls/grammar/parse-02.adoc[grammar&colon;&colon;parse],        xref:boost/urls/parse_uri.adoc[parse&lowbar;uri],        xref:boost/urls/url_view.adoc[url&lowbar;view]&period;






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