[#llvm-RAIIDelegateInstaller]
= xref:llvm.adoc[llvm]::RAIIDelegateInstaller
:relfileprefix: ../
:mrdocs:

A simple RAII based Delegate installer. Use this in a scope to install a delegate to the MachineFunction and reset it at the end of the scope.

== Synopsis

Declared in `<llvm/CodeGen/GlobalISel/GISelChangeObserver.h>`

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

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:llvm/RAIIDelegateInstaller/2constructor.adoc[`RAIIDelegateInstaller`]         [.small]#[constructor]#
| Install `Del` as the MachineFunction delegate for this object's lifetime.
| xref:llvm/RAIIDelegateInstaller/2destructor.adoc[`~RAIIDelegateInstaller`] [.small]#[destructor]#
| Restore the previous MachineFunction delegate.
|===



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