[#boost-urls-segments_encoded_ref-push_back]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/segments_encoded_ref.adoc[segments_encoded_ref]::push_back
:relfileprefix: ../../../
:mrdocs:


Append a segment

== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/segments_encoded_ref.hpp#L753[boost/url/segments_encoded_ref.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
push_back(xref:boost/urls/pct_string_view.adoc[pct_string_view] s);
----

== Description


This function appends a segment to        the end of the path.        Reserved characters in the string are        automatically escaped.        Escapes in the string are preserved.

All end iterators are invalidated.


=== Postconditions

[,cpp]
----
this->back() == s
----

=== Exception Safety

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



== Exceptions


|===
| Name | Thrown on

| `system_error`
| The string contains an invalid percent‐encoding.


|===

== Parameters


|===
| Name | Description

| *s*
| The segment to append.


|===



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