[PATCH] Add readability-remove-void-arg check to clang-tidy

[Gábor Horváth]

================
Comment at: clang-tidy/readability/RemoveVoidArg.cpp:73
@@ +72,3 @@
+  const LangOptions &LangOpts = Compiler.getLangOpts();
+  CPlusPlusFile_ = LangOpts.CPlusPlus || LangOpts.CPlusPlus11 ||
+                   LangOpts.CPlusPlus14 || LangOpts.CPlusPlus1z;
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As far as I can remember when the code compiled in e.g.: CPlusPlus14 mode, the CPlusPlus11  and CPlusPlus  flags are also turned on. It might be enough to check CPlusPlus.

http://reviews.llvm.org/D7639

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