[PATCH] D28467: [Sema] Add warning for unused lambda captures

[Malcolm Parsons via Phabricator via cfe-commits]

malcolm.parsons added a comment.

MSVC's behaviour is discussed here: https://social.msdn.microsoft.com/Forums/SqlServer/en-US/4abf18bd-4ae4-4c72-ba3e-3b13e7909d5f/error-c2057-or-c3493-trying-to-use-an-integral-constant-expression-inside-a-lambda?forum=vclanguage
and here:
https://connect.microsoft.com/VisualStudio/feedback/details/725780


Repository:
  rL LLVM

https://reviews.llvm.org/D28467