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


Assign elements

== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/params_ref.hpp#L315[boost/url/params_ref.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
xref:boost/urls/params_ref/assign-098.adoc[assign](std::initializer_list<xref:boost/urls/param_view.adoc[param_view]> init);
----

[.small]#xref:boost/urls/params_ref/assign-098.adoc[_» more..._]#

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class FwdIt>
void
xref:boost/urls/params_ref/assign-02.adoc[assign](
    FwdIt first,
    FwdIt last);
----

[.small]#xref:boost/urls/params_ref/assign-02.adoc[_» more..._]#

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class FwdIt>
void
xref:boost/urls/params_ref/assign-02.adoc[assign](
    FwdIt first,
    FwdIt last,
    std::forward_iterator_tag);
----

[.small]#xref:boost/urls/params_ref/assign-02.adoc[_» more..._]#

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class FwdIt>
void
xref:boost/urls/params_ref/assign-02.adoc[assign](
    FwdIt first,
    FwdIt last,
    std::input_iterator_tag) = delete;
----

[.small]#xref:boost/urls/params_ref/assign-02.adoc[_» more..._]#

== 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.params().assign( {{ "first", "John" }, { "last", "Doe" }} );
----

=== Complexity

Linear in `init.size()`.


=== Exception Safety

Strong guarantee.        Calls to allocate may throw.



== Parameters


|===
| Name | Description

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


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


|===



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