[#absl-UrlUnescape]
= xref:absl.adoc[absl]::UrlUnescape
:relfileprefix: ../
:mrdocs:

Performs the inverse transformation of UrlEscape(), converting each percent‐encoded sequence of the form "%AB" into the character with the hexadecimal value 0xAB. It returns `std::nullopt` if any % is not followed by two hexadecimal digits.

== Synopsis

Declared in `<absl/strings/escaping.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[nodiscard]]
std::optional<std::string>
UrlUnescape(std::string_view input);
----

== Description

UrlUnescape() is identical to UrlUnescapePlus() except that it does not unescape '+' to ' '.

== Return Value

The unescaped string, or `std::nullopt` on malformed input.

[NOTE]
====
The return value https://en.cppreference.com/cpp/language/attributes/nodiscard[should not be discarded^].
====
== Parameters

[cols="1,4"]
|===
| Name| Description
| *input*
| The percent‐encoded string to unescape.
|===


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