:relfileprefix: ../../../
[#boost-urls-static_url-set_query]

= xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/static_url.adoc[pass:[static_url]]::set_query


Set the query


== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/static_url.hpp#L406[boost/url/static_url.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
xref:boost/urls/static_url.adoc[static_url]&
set_query(core::string_view s);
----

== Description


This sets the query to the string, which
can be empty.
An empty query is distinct from having
no query.
Reserved characters in the string are
percent-escaped in the result.

=== Example
[,cpp]
----
assert( url( "http://example.com" ).set_query( "id=42" ).query() == "id=42" );
----

=== Postconditions
[,cpp]
----
this->has_query() == true && this->query() == s
----

=== Exception Safety

Strong guarantee.
Calls to allocate may throw.

=== BNF
[,cpp]
----
query           = *( pchar / "/" / "?" )

query-param     = key [ "=" value ]
query-params    = [ query-param ] *( "&" query-param )
----

=== Specification

* link:https://datatracker.ietf.org/doc/html/rfc3986#section-3.4[3.4.  Query (rfc3986)]

* link:https://en.wikipedia.org/wiki/Query_string[Query string (Wikipedia)]





== Parameters

|===
| Name | Description 

| *s*
| 
The string to set.

|===




== See Also


xref:boost/urls/url_base/encoded_params-06.adoc[encoded_params]
,
xref:boost/urls/url_base/params-0c.adoc[params]
,
xref:boost/urls/url_base/remove_query.adoc[remove_query]
,
xref:boost/urls/url_base/set_encoded_query.adoc[set_encoded_query]
.