[PATCH] Add readability-simplify-boolean-expr check to clang-tidy

[Ismail Pazarbasi]

Richard,

I think this check should allow expressions originating from macros:

  #define HAS_XYZ_FEATURE true
  static /*constexpr*/ bool returnTrue() { return true; }
  if (returnTrue() && HAS_XYZ_FEATURE);


http://reviews.llvm.org/D7648

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