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

A `FlagSaver` object stores the state of flags in the scope where the `FlagSaver` is defined, allowing modification of those flags within that scope and automatic restoration of the flags to their previous state upon leaving the scope.

== Synopsis

Declared in `<absl/flags/reflection.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class FlagSaver;
----

== Description

A `FlagSaver` can be used within tests to temporarily change the test environment and restore the test case to its previous state.

Example:

void MyFunc() { absl::FlagSaver fs; ... absl::SetFlag(&FLAGS_myFlag, otherValue); ... } // scope of FlagSaver left, flags return to previous state

This class is thread‐safe.

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:absl/FlagSaver/2constructor-04.adoc[`FlagSaver`]         [.small]#[constructor]#
| Constructors
| xref:absl/FlagSaver/2destructor.adoc[`~FlagSaver`] [.small]#[destructor]#
| Restores all flags to the state saved at construction.
| xref:absl/FlagSaver/operator_assign.adoc[`operator=`]  [.small]#[deleted]#
| Not assignable.
|===



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