:relfileprefix: ../../../
[#boost-urls-params_ref-erase-05]

== xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/params_ref.adoc[pass:[params_ref]]::erase


Erase elements


=== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/params_ref.hpp#L595[boost/url/params_ref.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
xref:boost/urls/params_base/iterator.adoc[iterator]
erase(xref:boost/urls/params_base/iterator.adoc[iterator] pos) noexcept;
----

=== Description


This function removes an element from
the container.



All iterators that are equal to
`pos` or come after are invalidated.
[,cpp]
----
url u( "?first=John&last=Doe" );

params_ref::iterator it = u.params().erase( u.params().begin() );

assert( u.encoded_query() == "last=Doe" );
----

=== Linear in `this-&gt;url().encoded_query().size()`.

=== Throws nothing.




=== Return Value


An iterator to one past
the removed element.



=== Parameters

|===
| Name | Description 

| *pos*
| 
An iterator to the element.

|===