[#boost-urls-params_base-empty]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/params_base.adoc[params_base]::empty
:relfileprefix: ../../../
:mrdocs:

Return true if there are no params

== Synopsis

Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/params_base.hpp#L202[boost/url/params_base.hpp]>`

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

== Description

== Example
[,cpp]
----
assert( ! url_view( "?key=value" ).params().empty() );
----
== Complexity
Constant.

== Exception Safety
Throws nothing.

== Return Value

`true` if there are no params.


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