:relfileprefix: ../../../
[#boost-urls-segments_base-front]

== xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/segments_base.adoc[pass:[segments_base]]::front


Return the first segment


=== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/segments_base.hpp#L261[boost/url/segments_base.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
std::string
front() const noexcept;
----

=== Description


This function returns a string with the
first segment of the path without any
leading or trailing '&sol;' separators.
Any percent-escapes in the string are
decoded first.
[,cpp]
----
this->empty() == false
----
[,cpp]
----
return *begin();
----
[,cpp]
----
assert( url_view( "/path/to/file.txt" ).segments().front() == "path" );
----

=== Linear in `this-&gt;front().size()`.

=== Calls to allocate may throw.