[#boost-urls-params_ref-clear]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/params_ref.adoc[params_ref]::clear
:relfileprefix: ../../../
:mrdocs:


Clear the contents of the container

== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/params_ref.hpp#L280[boost/url/params_ref.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
clear() noexcept;
----

== Description


All iterators are invalidated.


=== Effects

[,cpp]
----
this->url().remove_query();
----

=== Postconditions

[,cpp]
----
this->empty() == true && this->url().has_query() == false
----

=== Complexity

Constant.


=== Exception Safety

Throws nothing.





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