[#boost-urls-params_ref-erase-05a]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/params_ref.adoc[params&lowbar;ref]::erase
:relfileprefix: ../../../
:mrdocs:


Erase elements

== Synopsis


Declared in `&lt;https://www.github.com/boostorg/url/blob/develop/include/boost/url/params_ref.hpp#L595[boost&sol;url&sol;params&lowbar;ref&period;hpp]&gt;`

[source,cpp,subs="verbatim,replacements,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&period;

All iterators that are equal to        `pos` or come after are invalidated&period;


=== Example

[,cpp]
----
url u( "?first=John&last=Doe" );

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

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

=== Complexity

Linear in `this&hyphen;&gt;url()&period;encoded&lowbar;query()&period;size()`&period;


=== Exception Safety

Throws nothing&period;



== Return Value


An iterator to one past        the removed element&period;



== Parameters


|===
| Name | Description

| *pos*
| An iterator to the element&period;


|===



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