[clang-tools-extra] [clang-tidy] add option to `readability-use-concise-preprocessor-directives` to take consistency into account (PR #156220)

[Baranov Victor via cfe-commits]

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@@ -11,51 +11,124 @@
 #include "clang/Lex/Lexer.h"
 #include "clang/Lex/PPCallbacks.h"
 #include "clang/Lex/Preprocessor.h"
+#include "llvm/ADT/STLForwardCompat.h"
 
 #include <array>
 
 namespace clang::tidy::readability {
 
 namespace {
 
-class IfPreprocessorCallbacks final : public PPCallbacks {
+enum class DirectiveKind : bool { If, Elif };
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vbvictor wrote:

If we use `enum class`, does it matter to specify a type if it wouldn't be converted-to anyway?

https://github.com/llvm/llvm-project/pull/156220