[#boost-urls-segments_encoded_ref-push_back]
= xref:boost/urls/segments_encoded_ref/push_back.adoc[boost::urls::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#L757[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

[cols=2]
|===
| Name
| Thrown on
| `system_error`
| The string contains an invalid percent‐encoding.
|===

== Parameters

[cols=2]
|===
| Name
| Description
| *s*
| The segment to append.
|===


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