Re: Implement N4051 - Allow typename in a template template parameter

[Jason Merrill]

On 07/23/2014 10:31 PM, Ed Smith-Rowland wrote:
+    pedwarn (token->location, OPT_Wpedantic,
+            "ISO C++ forbids typename key in template template parameter");

This should mention -std=c++1z.

+  if (tag_type == none_type)
+    cp_parser_error (parser, "expected type-parameter-key");
...
+         case RT_TYPE_PARAMETER_KEY:
+           cp_parser_error (parser, "expected %<class%> or %<typename%>");

It seems unfortunate to have this diagnostic in two places.  I think 
let's not use cp_parser_require here.

Jason