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, 11 insertions, 11 deletions

diff --git a/src/lib/tls/tls_extensions.h b/src/lib/tls/tls_extensions.h
index 51d76ccbd..62ea8ef1e 100644
--- a/src/lib/tls/tls_extensions.h
+++ b/src/lib/tls/tls_extensions.h
@@ -71,7 +71,7 @@ class Extension
 /**
 * Server Name Indicator extension (RFC 3546)
 */
-class Server_Name_Indicator : public Extension
+class Server_Name_Indicator final : public Extension
    {
    public:
       static Handshake_Extension_Type static_type()
@@ -97,7 +97,7 @@ class Server_Name_Indicator : public Extension
 /**
 * SRP identifier extension (RFC 5054)
 */
-class SRP_Identifier : public Extension
+class SRP_Identifier final : public Extension
    {
    public:
       static Handshake_Extension_Type static_type()
@@ -123,7 +123,7 @@ class SRP_Identifier : public Extension
 /**
 * Renegotiation Indication Extension (RFC 5746)
 */
-class Renegotiation_Extension : public Extension
+class Renegotiation_Extension final : public Extension
    {
    public:
       static Handshake_Extension_Type static_type()
@@ -152,7 +152,7 @@ class Renegotiation_Extension : public Extension
 /**
 * Maximum Fragment Length Negotiation Extension (RFC 4366 sec 3.2)
 */
-class Maximum_Fragment_Length : public Extension
+class Maximum_Fragment_Length final : public Extension
    {
    public:
       static Handshake_Extension_Type static_type()
@@ -184,7 +184,7 @@ class Maximum_Fragment_Length : public Extension
 /**
 * ALPN (RFC 7301)
 */
-class Application_Layer_Protocol_Notification : public Extension
+class Application_Layer_Protocol_Notification final : public Extension
    {
    public:
       static Handshake_Extension_Type static_type() { return TLSEXT_ALPN; }
@@ -220,7 +220,7 @@ class Application_Layer_Protocol_Notification : public Extension
 /**
 * Session Ticket Extension (RFC 5077)
 */
-class Session_Ticket : public Extension
+class Session_Ticket final : public Extension
    {
    public:
       static Handshake_Extension_Type static_type()
@@ -259,7 +259,7 @@ class Session_Ticket : public Extension
 /**
 * Supported Elliptic Curves Extension (RFC 4492)
 */
-class Supported_Elliptic_Curves : public Extension
+class Supported_Elliptic_Curves final : public Extension
    {
    public:
       static Handshake_Extension_Type static_type()
@@ -288,7 +288,7 @@ class Supported_Elliptic_Curves : public Extension
 /**
 * Signature Algorithms Extension for TLS 1.2 (RFC 5246)
 */
-class Signature_Algorithms : public Extension
+class Signature_Algorithms final : public Extension
    {
    public:
       static Handshake_Extension_Type static_type()
@@ -327,7 +327,7 @@ class Signature_Algorithms : public Extension
 /**
 * Heartbeat Extension (RFC 6520)
 */
-class Heartbeat_Support_Indicator : public Extension
+class Heartbeat_Support_Indicator final : public Extension
    {
    public:
       static Handshake_Extension_Type static_type()
@@ -353,7 +353,7 @@ class Heartbeat_Support_Indicator : public Extension
 /**
 * Used to indicate SRTP algorithms for DTLS (RFC 5764)
 */
-class SRTP_Protection_Profiles : public Extension
+class SRTP_Protection_Profiles final : public Extension
    {
    public:
       static Handshake_Extension_Type static_type()
@@ -379,7 +379,7 @@ class SRTP_Protection_Profiles : public Extension
 /**
 * Extended Master Secret Extension (RFC 7627)
 */
-class Extended_Master_Secret : public Extension
+class Extended_Master_Secret final : public Extension
    {
    public:
       static Handshake_Extension_Type static_type()