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


Erase params

== Synopsis


Declared in `&lt;https://www.github.com/boostorg/url/blob/develop/include/boost/url/params_encoded_ref.hpp#L597[boost&sol;url&sol;params&lowbar;encoded&lowbar;ref&period;hpp]&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:boost/urls/params_encoded_base/iterator.adoc[iterator]
xref:boost/urls/params_encoded_ref/erase-08.adoc[erase](xref:boost/urls/params_encoded_base/iterator.adoc[iterator] pos) noexcept;
----

[.small]#xref:boost/urls/params_encoded_ref/erase-08.adoc[_» more..._]#

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:boost/urls/params_encoded_base/iterator.adoc[iterator]
xref:boost/urls/params_encoded_ref/erase-0b.adoc[erase](
    xref:boost/urls/params_encoded_base/iterator.adoc[iterator] first,
    xref:boost/urls/params_encoded_base/iterator.adoc[iterator] last) noexcept;
----

[.small]#xref:boost/urls/params_encoded_ref/erase-0b.adoc[_» more..._]#

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::size&lowbar;t
xref:boost/urls/params_encoded_ref/erase-00.adoc[erase](
    xref:boost/urls/pct_string_view.adoc[pct&lowbar;string&lowbar;view] key,
    xref:boost/urls/ignore_case_param.adoc[ignore&lowbar;case&lowbar;param] ic = &lcub;&rcub;) noexcept;
----

[.small]#xref:boost/urls/params_encoded_ref/erase-00.adoc[_» more..._]#

== 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_encoded_ref::iterator it = u.encoded_params().erase( u.encoded_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;



== Exceptions


|===
| Name | Thrown on

| `system&lowbar;error`
| `key` contains an invalid percent&hyphen;encoding&period;


|===

== Return Value


An iterator to one past        the removed element&period;



== Parameters


|===
| Name | Description

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


| *first,*
| last The range of        params to erase&period;


| *key*
| The key to match&period;        By default, a case&hyphen;sensitive        comparison is used&period;


| *ic*
| An optional parameter&period; If        the value xref:boost/urls/ignore_case.adoc[ignore&lowbar;case] is passed        here, the comparison is        case&hyphen;insensitive&period;


|===



[.small]#Created with https://www.mrdocs.com[MrDocs]#
