[#absl-SetFlag-00]
= xref:absl.adoc[absl]::SetFlag
:relfileprefix: ../
:mrdocs:

`SetFlag` overloads

== Synopses

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

Sets the value of an `absl::Flag` to the value `v`. Do not construct an `absl::Flag<T>` directly and call `absl::SetFlag()`; instead, use the flag's variable name (e.g. `FLAGS_name`). This function is thread‐safe, but is potentially expensive. Avoid setting flags in general, but especially within performance‐critical code.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename T>
void
xref:absl/SetFlag-0d.adoc[SetFlag](
    xref:absl/Flag.adoc[absl::Flag<T>]* flag,
    T const& v);
----

[.small]#xref:absl/SetFlag-0d.adoc[_» more..._]#

Overload of `SetFlag()` to allow callers to pass in a value that is convertible to `T`. E.g., use this overload to pass a "const char*" when `T` is `std::string`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    typename T,
    typename V>
void
xref:absl/SetFlag-07.adoc[SetFlag](
    xref:absl/Flag.adoc[absl::Flag<T>]* flag,
    V const& v);
----

[.small]#xref:absl/SetFlag-07.adoc[_» more..._]#

== Parameters

[cols="1,4"]
|===
| Name| Description
| *flag*
| The flag to update.
| *v*
| The new value to assign to `flag`.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#