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, 2 insertions, 2 deletions

diff --git a/src/lib/entropy/unix_procs/unix_procs.h b/src/lib/entropy/unix_procs/unix_procs.h
index bc2fd87d1..e1749af5f 100644
--- a/src/lib/entropy/unix_procs/unix_procs.h
+++ b/src/lib/entropy/unix_procs/unix_procs.h
@@ -20,7 +20,7 @@ namespace Botan {
 * effective against local attackers as they can sample from the same
 * distribution.
 */
-class Unix_EntropySource : public Entropy_Source
+class Unix_EntropySource final : public Entropy_Source
    {
    public:
       std::string name() const override { return "unix_procs"; }
@@ -78,7 +78,7 @@ class Unix_EntropySource : public Entropy_Source
       secure_vector<byte> m_buf;
    };
 
-class UnixProcessInfo_EntropySource : public Entropy_Source
+class UnixProcessInfo_EntropySource final : public Entropy_Source
    {
    public:
       std::string name() const override { return "proc_info"; }