Add final attribute to many classes

In some cases this can offer better optimization, via devirtualization.
And it lets the user know the class is not intended for derivation.

Some discussion in GH #402

1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib/entropy/rdseed/rdseed.h b/src/lib/entropy/rdseed/rdseed.h
index 0f39250a1..f86c32768 100644
--- a/src/lib/entropy/rdseed/rdseed.h
+++ b/src/lib/entropy/rdseed/rdseed.h
@@ -16,7 +16,7 @@ namespace Botan {
 * Entropy source using the rdseed instruction first introduced on
 * Intel's Broadwell architecture.
 */
-class Intel_Rdseed : public Entropy_Source
+class Intel_Rdseed final : public Entropy_Source
    {
    public:
       std::string name() const override { return "rdseed"; }