Better handling of failures in parse_name.

include/boost/leaf/detail/demangle.hpp

@@ -136,6 +136,14 @@ namespace leaf_detail
         }
     };
 
+    // Workaround - we only use this function if parse_name (below) fails to parse __PRETTY_FUNCTION__ / __FUNCSIG__.
+    // In this case parse_name should be fixed to support the newly encountered (note, parsing is done at compile-time).
+    template <class Name>
+    parsed_name please_update_parse_name()
+    {
+        return parsed_name(BOOST_LEAF_PRETTY_FUNCTION);
+    }
+
     template <class Name>
     parsed_name parse_name()
     {
@@ -169,8 +177,8 @@ namespace leaf_detail
         BOOST_LEAF_PARSE_PF( "struct boost::leaf::parsed_name __fastcall boost::leaf::leaf_detail::parse_name<enum ", ">(void)");
 #undef BOOST_LEAF_PARSE_PF
 
-        // Unrecognized __PRETTY_FUNCTION__/__FUNSIG__ format, return as-is. Note, parsing is done at compile-time.
-        return parsed_name(BOOST_LEAF_PRETTY_FUNCTION);
+        // Unrecognized __PRETTY_FUNCTION__ / __FUNCSIG__ format, return as-is. Note, parsing is done at compile-time.
+        return please_update_parse_name<Name>();
     }
 }