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

[Richard]

Hi alexfh,

This check for clang-tidy looks for function with zero arguments declared as (void) and removes the unnecessary void token.

int foo(void);

becomes

int foo();

The check performs no formatting of the surrounding context but uses the lexer to look for the token sequence "(", "void", ")" in the prototype text.  If this sequence of tokens is found, a removal is issued for the void token only.

http://reviews.llvm.org/D7639

Files:
  clang-tidy/readability/CMakeLists.txt
  clang-tidy/readability/ReadabilityTidyModule.cpp
  clang-tidy/readability/RemoveVoidArg.cpp
  clang-tidy/readability/RemoveVoidArg.h
  test/clang-tidy/readability-remove-void-arg.cpp

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