:relfileprefix: ../../../
[#boost-urls-params_ref-replace-0b]

== xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/params_ref.adoc[pass:[params_ref]]::replace


Replace elements


=== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/params_ref.hpp#L727[boost/url/params_ref.hpp,window=blank_]>`

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

=== Description


This function replaces a range of
elements with the params in an
_initializer-list_
.



All iterators that are equal to
`from` or come after are invalidated.
[NOTE]

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

=== Linear in `this-&gt;url().encoded_query().size()`.

=== Strong guarantee.

Calls to allocate may throw.




=== Return Value


An iterator to the first
element inserted, or one past `to` if
`init.size() &equals;&equals; 0`.



=== Parameters

|===
| Name | Description 

| *from,to*
| 
The range of elements
to replace.

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

|===