[#boost-urls-url_view_base-is_path_absolute]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/url_view_base.adoc[url_view_base]::is_path_absolute
:relfileprefix: ../../../
:mrdocs:


Return true if the path is absolute

== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/url_view_base.hpp#L1595[boost/url/url_view_base.hpp]>`

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

== Description


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


=== 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&period;3&period;  Path (rfc3986)]

Return true if the path is absolute

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


=== Example

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

=== Complexity

Constant&period;


=== Exception Safety

Throws nothing&period;


=== 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&period;3&period;  Path (rfc3986)]



== See Also


xref:boost/urls/url_view_base/encoded_path.adoc[encoded&lowbar;path],            xref:boost/urls/url_view_base/encoded_segments.adoc[encoded&lowbar;segments]&period;            xref:boost/urls/url_view_base/path.adoc[path],            xref:boost/urls/url_view_base/segments.adoc[segments]&period;



xref:boost/urls/url_view_base/encoded_path.adoc[encoded&lowbar;path],            xref:boost/urls/url_view_base/encoded_segments.adoc[encoded&lowbar;segments]&period;            xref:boost/urls/url_view_base/path.adoc[path],            xref:boost/urls/url_view_base/segments.adoc[segments]&period;






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