Fixed #345.

Removed new version ob BOOST_TYPE_ERASURE_MEMBER.

The new style requires compiler extension.
If -pedantic compile option is set, then get
"must specify at least one argument for '...' parameter of variadic macro"

include/mqtt/type_erased_socket.hpp

@@ -17,32 +17,17 @@
 #include <mqtt/namespace.hpp>
 #include <mqtt/shared_any.hpp>
 
-#if BOOST_VERSION >= 106700
-
-namespace MQTT_NS {
-
-// New style boost type_erasure member fucntion concept definition
-BOOST_TYPE_ERASURE_MEMBER(has_async_read, async_read)
-BOOST_TYPE_ERASURE_MEMBER(has_async_write, async_write)
-BOOST_TYPE_ERASURE_MEMBER(has_write, write)
-BOOST_TYPE_ERASURE_MEMBER(has_post, post)
-BOOST_TYPE_ERASURE_MEMBER(has_lowest_layer, lowest_layer)
-BOOST_TYPE_ERASURE_MEMBER(has_close, close)
-
-} // namespace MQTT_NS
-
-#else //  BOOST_VERSION >= 106700
-
-// Old style boost type_erasure member fucntion concept definition
+// I intentionally use old style boost type_erasure member fucntion concept definition.
+// The new style requires compiler extension.
+// If -pedantic compile option is set, then get
+// "must specify at least one argument for '...' parameter of variadic macro"
 BOOST_TYPE_ERASURE_MEMBER((mqtt)(has_async_read), async_read, 3)
 BOOST_TYPE_ERASURE_MEMBER((mqtt)(has_async_write), async_write, 3)
 BOOST_TYPE_ERASURE_MEMBER((mqtt)(has_write), write, 2)
 BOOST_TYPE_ERASURE_MEMBER((mqtt)(has_post), post, 1)
 BOOST_TYPE_ERASURE_MEMBER((mqtt)(has_lowest_layer), lowest_layer, 0)
 BOOST_TYPE_ERASURE_MEMBER((mqtt)(has_close), close, 1)
 
-#endif // BOOST_VERSION >= 106700
-
 namespace MQTT_NS {
 
 namespace as = boost::asio;