:relfileprefix: ../../../
[#boost-urls-params_encoded_ref-operator_assign-03]

= xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/params_encoded_ref.adoc[pass:[params_encoded_ref]]::operator=


Assignment


== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/params_encoded_ref.hpp#L179[boost/url/params_encoded_ref.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
xref:boost/urls/params_encoded_ref.adoc[params_encoded_ref]&
operator=(xref:std.adoc[std]::initializer_list<xref:boost/urls/param_pct_view.adoc[param_pct_view]> init);
----

== Description


After assignment, the previous contents
of the query parameters are replaced by
the contents of the initializer-list.



All iterators are invalidated.

=== Preconditions

None of character buffers referenced by
`init` may overlap the character buffer of
the underlying url, or else the behavior
is undefined.

=== Effects
[,cpp]
----
this->assign( init.begin(), init.end() );
----

=== Complexity

Linear in `init.size()`.

=== Exception Safety

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



== Exceptions

|===
| Name | Thrown on

| `system_error`
| 
`init` contains an invalid percent-encoding.

|===



== Parameters

|===
| Name | Description 

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

|===