On 06/29/2011 05:15 PM, Jason Merrill wrote:
> This patch adds support for use of 'this' (implicitly or explicitly) in
> the trailing-return-type of a member function.

The above patch wasn't enough, though.  The following patch fixes some 
issues that arose with real uses, including mangling.

Tested x86_64-pc-linux-gnu, applying to trunk.