:relfileprefix: ../../../
[#boost-urls-url_view_base-is_path_absolute]

= xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/url_view_base.adoc[pass:[url_view_base]]::is_path_absolute


Return true if the path is absolute


== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/url_view_base.hpp#L1611[boost/url/url_view_base.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
bool
is_path_absolute() const noexcept;
----

== Description


This function returns true if the path
begins with a forward slash ('&sol;').

=== Example
[,cpp]
----
assert( url_view( "/path/to/file.txt" ).is_path_absolute() );
----

=== Complexity

Constant.

=== Exception Safety

Throws nothing.

=== BNF
[,cpp]
----
path          = path-abempty    ; begins with "/" or is empty
              / path-absolute   ; begins with "/" but not "//"
              / path-noscheme   ; begins with a non-colon segment
              / path-rootless   ; begins with a segment
              / path-empty      ; zero characters

path-abempty  = *( "/" segment )
path-absolute = "/" [ segment-nz *( "/" segment ) ]
path-noscheme = segment-nz-nc *( "/" segment )
path-rootless = segment-nz *( "/" segment )
path-empty    = 0<pchar>
----

=== Specification

* link:https://datatracker.ietf.org/doc/html/rfc3986#section-3.3[3.3.  Path (rfc3986)]








== See Also


xref:boost/urls/url_view_base/encoded_path.adoc[encoded_path]
,
xref:boost/urls/url_view_base/encoded_segments.adoc[encoded_segments]
.
xref:boost/urls/url_view_base/path.adoc[path]
,
xref:boost/urls/url_view_base/segments.adoc[segments]
.