[#boost-urls-uri_rule]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::uri&lowbar;rule
:relfileprefix: ../../
:mrdocs:

Rule for URI

== Synopsis

Declared in `&lt;https://www.github.com/boostorg/url/blob/develop/include/boost/url/rfc/uri_rule.hpp#Lundefined[boost&sol;url&sol;rfc&sol;uri&lowbar;rule&period;hpp]&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr &sol;&ast; implementation-defined &ast;&sol; uri&lowbar;rule = &lcub;&rcub;;
----

== Value Type

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

Rules are used with the function xref:boost/urls/grammar/parse-09.adoc[`grammar&colon;&colon;parse`]&period;

[,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

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

== See Also

xref:boost/urls/grammar/parse-09.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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