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/dev_random/dev_random.h b/src/lib/entropy/dev_random/dev_random.h
index f634cf16c..1f29b2f64 100644
--- a/src/lib/entropy/dev_random/dev_random.h
+++ b/src/lib/entropy/dev_random/dev_random.h
@@ -17,7 +17,7 @@ namespace Botan {
 /**
 * Entropy source reading from kernel devices like /dev/random
 */
-class Device_EntropySource : public Entropy_Source
+class Device_EntropySource final : public Entropy_Source
    {
    public:
       std::string name() const override { return "dev_random"; }