Using tag inheritance to simplify metaprogramming.

deanberris · deanberris · commit 49c414524324 · 2010-06-22T22:55:12.000+08:00
diff --git a/boost/network/tags.hpp b/boost/network/tags.hpp
@@ -11,15 +11,18 @@
 namespace boost { namespace network { namespace tags {
 
     struct async {};
+    struct http {};
+    struct tcp {};
+    struct udp {};
 
 struct default_string {};
 struct default_wstring {};
-struct http_default_8bit_tcp_resolve {};
-struct http_default_8bit_udp_resolve {};
-struct http_keepalive_8bit_tcp_resolve {};
-struct http_keepalive_8bit_udp_resolve {};
-struct http_server {};
-struct http_async_8bit_udp_resolve : async {};
+struct http_default_8bit_tcp_resolve : http,tcp {};
+struct http_default_8bit_udp_resolve : http,udp {};
+struct http_keepalive_8bit_tcp_resolve : http,tcp {};
+struct http_keepalive_8bit_udp_resolve : http,udp {};
+struct http_server : http {};
+struct http_async_8bit_udp_resolve : http,async,udp {};
 
 typedef default_string default_;
 
