D-Programming-Language/dmd — pull request #1685 by AndrejMitrovic (2013-02-22 21:29:18+00:00)
Title: Issue 9574 - Better diagnostic on old 'alias this = that' syntax.

http://d.puremagic.com/issues/show_bug.cgi?id=9574

@9rnsr: Do you think the implementation is correct?

Also as noted in bugzilla I will later change the diagnostic to `use alias this : x` once that syntax is implemented.