[#boost-urls-params_ref-append-07]
= 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#L410[boost/url/params_ref.hpp]>`

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

== Description


This function appends the params in        an _initializer‐list_ to the view.

The `end()` iterator is invalidated.


=== Example

[,cpp]
----
url u;

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

=== Complexity

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


=== Exception Safety

Strong guarantee.        Calls to allocate may throw.



== Return Value


An iterator to the first new element.



== Parameters


|===
| Name | Description

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


|===



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