Whilst looking at how clang-tidy might be able to handle such large scale variable renaming for something like https://reviews.llvm.org/D59251 I decided to run clang-tidy over the clang code base (starting in lib/Format)

The following code shows an example which will fail to correctly be fixed

-----------------------------------------------------
#include <vector>

class Foo {
public:
  Foo(std::vector<bool> &Stack)
      : Stack(Stack) {
    Stack.push_back(true);
  }
  ~Foo() {
    Stack.pop_back();
  }

  std::vector<bool> &Stack;
};
-----------------------------------------------------

will be converted to (notice the Stack.pop_back() in the destructor)

-----------------------------------------------------
class Foo {
public:
  Foo(std::vector<bool> &stack)
      : stack(stack) {
    stack.push_back(true);
  }
  ~Foo() {
    Stack.pop_back();
  }

  std::vector<bool> &stack;
};

-----------------------------------------------------

Conversion was done with the following .clang-tidy file

-----------------------------------------------------
Checks: '-*,readability-identifier-naming'
CheckOptions:
  - key:             readability-identifier-naming.MemberCase
    value:           camelBack
  - key:             readability-identifier-naming.PrivateMemberCase
    value:           camelBack
  - key:             readability-identifier-naming.ParameterCase
    value:           camelBack
  - key:             readability-identifier-naming.VariableCase
    value:           camelBack
  - key:             readability-identifier-naming.PointerParameterCase
    value:           camelBack
-----------------------------------------------------


c:\Repos\buildareas\tidy_tests\test3.cxx:5:26: warning: invalid case style for parameter 'Stack' [readability-identifier-naming]
  Foo(std::vector<bool> &Stack)
                         ^~~~~
                         stack
c:\Repos\buildareas\tidy_tests\test3.cxx:5:26: note: FIX-IT applied suggested code changes
c:\Repos\buildareas\tidy_tests\test3.cxx:6:15: note: FIX-IT applied suggested code changes
      : Stack(Stack) {
              ^
c:\Repos\buildareas\tidy_tests\test3.cxx:7:5: note: FIX-IT applied suggested code changes
    Stack.push_back(true);
    ^
c:\Repos\buildareas\tidy_tests\test3.cxx:13:22: warning: invalid case style for member 'Stack' [readability-identifier-naming]
  std::vector<bool> &Stack;
                     ^~~~~
                     stack
c:\Repos\buildareas\tidy_tests\test3.cxx:6:9: note: FIX-IT applied suggested code changes
      : Stack(Stack) {
        ^
c:\Repos\buildareas\tidy_tests\test3.cxx:13:22: note: FIX-IT applied suggested code changes
  std::vector<bool> &Stack;
                     ^
clang-tidy applied 5 of 5 suggested fixes.