[#boost-urls-params_encoded_ref-assign-00]
= xref:boost/urls/params_encoded_ref/assign-00.adoc[boost::urls::params_encoded_ref::assign]
:relfileprefix: ../../../
:mrdocs:

Assign params

== Synopsis

Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/params_encoded_ref.hpp#L295[boost/url/params_encoded_ref.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
assign(std::initializer_list<param_pct_view> init);
----

== Description

This function replaces the entire contents of the view with the params in the _initializer‐list_.

All iterators are invalidated.

[NOTE]
The strings referenced by the inputs must not come from the underlying url, or else the behavior is undefined.

== Example
[,cpp]
----
url u;

u.encoded_params().assign({ { "first", "John" }, { "last", "Doe" } });
----
== Complexity
Linear in `init.size()`.

== Exception Safety
Strong guarantee. Calls to allocate may throw. Exceptions thrown on invalid input.

== Exceptions

[cols=2]
|===
| Name
| Thrown on
| `system_error`
| `init` contains an invalid percent‐encoding.
|===

== Parameters

[cols=2]
|===
| Name
| Description
| *init*
| The list of params to assign.
|===


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