[PATCH] Adding a diagnostic for member templates inside a local class

[Richard Smith]

  We handle this correctly in most cases (local alias templates nested within
  function templates don't work quite right IIRC). Also, a member of the C++
  committee is planning on proposing a simpler form of this as a language
  feature (for C++14 or C++17).

http://llvm-reviews.chandlerc.com/D575