:relfileprefix: ../../../
[#F0887477DC879F9C7AAC34D6FB4538E1BFB31DC4]

= Function url::url

pass:v,q[Constructor]


== Synopsis

Declared in header `</boost/url/url.hpp#L120[boost/url/url.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
url() noexcept = default;
----

== Description

pass:v,q[Default constructed urls contain] pass:v,q[a zero-length string. This matches]
pass:v,q[the grammar for a relative-ref with]
pass:v,q[an empty path and no query or]
pass:v,q[fragment.]

=== Example
[,cpp]
----
url u;
----

=== Postconditions
[,cpp]
----
this->empty() == true
----

=== Complexity
pass:v,q[Constant.]

=== Exception Safety
pass:v,q[Throws nothing.]

=== BNF
[,cpp]
----
relative-ref  = relative-part [ "?" query ] [ "#" fragment ]
----

=== Specification
link:https://datatracker.ietf.org/doc/html/rfc3986#section-4.2[4.2. Relative Reference (rfc3986)]



== Return Value

* `void`