role_type is in boost/beast/core/role.hpp (API Change):

This enumeration is now part of the library core and
not specific to websocket.

example/websocket/client/async-ssl/websocket_client_async_ssl.cpp

@@ -129,7 +129,7 @@ public:
         // Set suggested timeout settings for the websocket
         ws_.set_option(
             websocket::stream_base::suggested_settings(
-                websocket::role_type::client));
+                beast::role_type::client));
 
         // Set a decorator to change the User-Agent of the handshake
         ws_.set_option(websocket::stream_base::decorator(

example/websocket/client/async/websocket_client_async.cpp

@@ -106,7 +106,7 @@ public:
         // Set suggested timeout settings for the websocket
         ws_.set_option(
             websocket::stream_base::suggested_settings(
-                websocket::role_type::client));
+                beast::role_type::client));
 
         // Set a decorator to change the User-Agent of the handshake
         ws_.set_option(websocket::stream_base::decorator(

example/websocket/client/coro-ssl/websocket_client_coro_ssl.cpp

@@ -95,7 +95,7 @@ do_session(
     // Set suggested timeout settings for the websocket
     ws.set_option(
         websocket::stream_base::suggested_settings(
-            websocket::role_type::client));
+            beast::role_type::client));
 
     // Perform the websocket handshake
     ws.async_handshake(host, "/", yield[ec]);

example/websocket/client/coro/websocket_client_coro.cpp

@@ -71,7 +71,7 @@ do_session(
     // Set suggested timeout settings for the websocket
     ws.set_option(
         websocket::stream_base::suggested_settings(
-            websocket::role_type::client));
+            beast::role_type::client));
 
     // Set a decorator to change the User-Agent of the handshake
     ws.set_option(websocket::stream_base::decorator(

example/websocket/server/async-ssl/websocket_server_async_ssl.cpp

@@ -87,7 +87,7 @@ public:
         // Set suggested timeout settings for the websocket
         ws_.set_option(
             websocket::stream_base::suggested_settings(
-                websocket::role_type::server));
+                beast::role_type::server));
 
         // Set a decorator to change the Server of the handshake
         ws_.set_option(websocket::stream_base::decorator(

example/websocket/server/async/websocket_server_async.cpp

@@ -61,7 +61,7 @@ public:
         // Set suggested timeout settings for the websocket
         ws_.set_option(
             websocket::stream_base::suggested_settings(
-                websocket::role_type::server));
+                beast::role_type::server));
 
         // Set a decorator to change the Server of the handshake
         ws_.set_option(websocket::stream_base::decorator(

example/websocket/server/chat-multi/websocket_session.hpp

@@ -64,7 +64,7 @@ run(http::request<Body, http::basic_fields<Allocator>> req)
     // Set suggested timeout settings for the websocket
     ws_.set_option(
         websocket::stream_base::suggested_settings(
-            websocket::role_type::server));
+            beast::role_type::server));
 
     // Set a decorator to change the Server of the handshake
     ws_.set_option(websocket::stream_base::decorator(

example/websocket/server/coro-ssl/websocket_server_coro_ssl.cpp

@@ -69,7 +69,7 @@ do_session(
     // Set suggested timeout settings for the websocket
     ws.set_option(
         websocket::stream_base::suggested_settings(
-            websocket::role_type::server));
+            beast::role_type::server));
 
     // Set a decorator to change the Server of the handshake
     ws.set_option(websocket::stream_base::decorator(

example/websocket/server/coro/websocket_server_coro.cpp

@@ -51,7 +51,7 @@ do_session(
     // Set suggested timeout settings for the websocket
     ws.set_option(
         websocket::stream_base::suggested_settings(
-            websocket::role_type::server));
+            beast::role_type::server));
 
     // Set a decorator to change the Server of the handshake
     ws.set_option(websocket::stream_base::decorator(

example/websocket/server/fast/websocket_server_fast.cpp

@@ -159,7 +159,7 @@ public:
         // Set suggested timeout settings for the websocket
         ws_.set_option(
             websocket::stream_base::suggested_settings(
-                websocket::role_type::server));
+                beast::role_type::server));
 
         // Set a decorator to change the Server of the handshake
         ws_.set_option(websocket::stream_base::decorator(
@@ -339,7 +339,7 @@ do_coro_session(
     // Set suggested timeout settings for the websocket
     ws.set_option(
         websocket::stream_base::suggested_settings(
-            websocket::role_type::server));
+            beast::role_type::server));
 
     // Set a decorator to change the Server of the handshake
     ws.set_option(websocket::stream_base::decorator(

example/websocket/server/stackless-ssl/websocket_server_stackless_ssl.cpp

@@ -99,7 +99,7 @@ public:
             // Set suggested timeout settings for the websocket
             ws_.set_option(
                 websocket::stream_base::suggested_settings(
-                    websocket::role_type::server));
+                    beast::role_type::server));
 
             // Set a decorator to change the Server of the handshake
             ws_.set_option(websocket::stream_base::decorator(

example/websocket/server/stackless/websocket_server_stackless.cpp

@@ -76,7 +76,7 @@ public:
             // Set suggested timeout settings for the websocket
             ws_.set_option(
                 websocket::stream_base::suggested_settings(
-                    websocket::role_type::server));
+                    beast::role_type::server));
 
             // Set a decorator to change the Server of the handshake
             ws_.set_option(websocket::stream_base::decorator(