:relfileprefix: ../../../../../
[#boost-urls-grammar-implementation_defined-rule_ref-r_]

== xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/grammar.adoc[pass:[grammar]]::xref:boost/urls/grammar/implementation_defined.adoc[pass:[implementation_defined]]::xref:boost/urls/grammar/implementation_defined/rule_ref.adoc[pass:[rule_ref]]::r_



=== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/grammar/parse.hpp#L72[boost/url/grammar/parse.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
Rule const& r_;
----