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/egd/es_egd.h b/src/lib/entropy/egd/es_egd.h
index e03fcf009..1a624713a 100644
--- a/src/lib/entropy/egd/es_egd.h
+++ b/src/lib/entropy/egd/es_egd.h
@@ -18,7 +18,7 @@ namespace Botan {
 /**
 * EGD Entropy Source
 */
-class EGD_EntropySource : public Entropy_Source
+class EGD_EntropySource final : public Entropy_Source
    {
    public:
       std::string name() const override { return "egd"; }