:relfileprefix: ../../../
[#boost-urls-segments_encoded_ref-assign-0e]

= xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/segments_encoded_ref.adoc[pass:[segments_encoded_ref]]::assign


Assign segments


== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/segments_encoded_ref.hpp#L321[boost/url/segments_encoded_ref.hpp,window=blank_]>`

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

== Description


The existing contents are replaced
by a copy of the contents of the
initializer list.
Reserved characters in the list are
automatically escaped.
Escapes in the list are preserved.



All iterators are invalidated.
[NOTE]

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

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

u.segments().assign( {"path", "to", "file.txt"} );
----

=== Complexity

Linear in `init.size() + this-&gt;url().encoded_query().size() + this-&gt;url().encoded_fragment().size()`.

=== Exception Safety

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



== Exceptions

|===
| Name | Thrown on

| `system_error`
| 
The list contains an invalid percent-encoding.

|===



== Parameters

|===
| Name | Description 

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

|===