[#boost-urls-static_url-2constructor]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/static_url.adoc[static_url]::static_url
:relfileprefix: ../../../
:mrdocs:


Constructor

== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/static_url.hpp#L165[boost/url/static_url.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:boost/urls/static_url/2constructor-098.adoc[static_url]() noexcept;
----

[.small]#xref:boost/urls/static_url/2constructor-098.adoc[_» more..._]#

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
xref:boost/urls/static_url/2constructor-08.adoc[static_url](core::string_view s);
----

[.small]#xref:boost/urls/static_url/2constructor-08.adoc[_» more..._]#

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:boost/urls/static_url/2constructor-09f.adoc[static_url](xref:boost/urls/static_url.adoc[static_url] const& u) noexcept;
----

[.small]#xref:boost/urls/static_url/2constructor-09f.adoc[_» more..._]#

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:boost/urls/static_url/2constructor-0b.adoc[static_url](xref:boost/urls/url_view_base.adoc[url_view_base] const& u);
----

[.small]#xref:boost/urls/static_url/2constructor-0b.adoc[_» more..._]#

== Description


Default constructed urls contain        a zero‐length string. This matches        the grammar for a relative‐ref with        an empty path and no query or        fragment.


=== Example

[,cpp]
----
static_url< 1024 > u;
----

=== Postconditions

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

=== Complexity

Constant&period;


=== Exception Safety

Throws nothing&period;


=== BNF

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

=== Specification

link:https://datatracker.ietf.org/doc/html/rfc3986#section-4.2[4&period;2&period; Relative Reference (rfc3986)]



== Exceptions


|===
| Name | Thrown on

| `system&lowbar;error`
| The input does not contain a valid url&period;


|===

== Parameters


|===
| Name | Description

| *s*
| The string to parse&period;


| *u*
| The url to copy&period;


|===



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