:relfileprefix: ../../../
[#boost-urls-url_base-normalize_scheme]

= xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/url_base.adoc[pass:[url_base]]::normalize_scheme


Normalize the URL scheme


== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/url_base.hpp#L2560[boost/url/url_base.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
xref:boost/urls/url_base.adoc[url_base]&
normalize_scheme();
----

== Description


Applies Syntax-based normalization to the
URL scheme.

The scheme is normalized to lowercase.

=== Exception Safety

Strong guarantee.
Calls to allocate may throw.

=== Specification

* link:https://datatracker.ietf.org/doc/html/rfc3986#section-6.2.2[6.2.2 Syntax-Based Normalization (rfc3986)]