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


Append elements

== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/params_ref.hpp#L380[boost/url/params_ref.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:boost/urls/params_base/iterator.adoc[iterator]
xref:boost/urls/params_ref/append-0f.adoc[append](xref:boost/urls/param_view.adoc[param_view] const& p);
----

[.small]#xref:boost/urls/params_ref/append-0f.adoc[_» more..._]#

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:boost/urls/params_base/iterator.adoc[iterator]
xref:boost/urls/params_ref/append-07.adoc[append](std::initializer_list<xref:boost/urls/param_view.adoc[param_view]> init);
----

[.small]#xref:boost/urls/params_ref/append-07.adoc[_» more..._]#

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class FwdIt>
xref:boost/urls/params_base/iterator.adoc[iterator]
xref:boost/urls/params_ref/append-0c.adoc[append](
    FwdIt first,
    FwdIt last);
----

[.small]#xref:boost/urls/params_ref/append-0c.adoc[_» more..._]#

== Description


This function appends a param to the view.

The `end()` iterator is invalidated.


=== Example

[,cpp]
----
url u;

u.params().append( { "first", "John" } );
----

=== Complexity

Linear in `this‐>url().encoded_query().size()`.


=== Exception Safety

Strong guarantee.        Calls to allocate may throw.



== Return Value


An iterator to the new element.



== Parameters


|===
| Name | Description

| *p*
| The param to append.


| *init*
| The list of params to append.


| *first,*
| last The range of params        to append.


|===



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