llvm-project/clang-tools-extra/clang-tidy/readability/UseConcisePreprocessorDirectivesCheck.h
Victor Chernyakin 59b39c0031
[clang-tidy] Add new check: readability-use-concise-preprocessor-directives (#146830)
Closes #132561.

This is a check that rewrites `#if`s and `#elif`s like so:

```cpp
#if  defined(MEOW) // -> #ifdef  MEOW
#if !defined(MEOW) // -> #ifndef MEOW
```

And, since C23 and C++23:

```cpp
#elif  defined(MEOW) // -> #elifdef  MEOW
#elif !defined(MEOW) // -> #elifndef MEOW
```
2025-07-13 19:23:27 +03:00

35 lines
1.4 KiB
C++

//===--- UseConcisePreprocessorDirectivesCheck.h - clang-tidy ---*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_USECONCISEPREPROCESSORDIRECTIVESCHECK_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_USECONCISEPREPROCESSORDIRECTIVESCHECK_H
#include "../ClangTidyCheck.h"
namespace clang::tidy::readability {
/// Finds uses of ``#if`` that can be simplified to ``#ifdef`` or ``#ifndef``
/// and, since C23 and C++23, uses of ``#elif`` that can be simplified to
/// ``#elifdef`` or ``#elifndef``.
///
/// User-facing documentation:
/// https://clang.llvm.org/extra/clang-tidy/checks/readability/use-concise-preprocessor-directives.html
class UseConcisePreprocessorDirectivesCheck : public ClangTidyCheck {
public:
using ClangTidyCheck::ClangTidyCheck;
void registerPPCallbacks(const SourceManager &SM, Preprocessor *PP,
Preprocessor *ModuleExpanderPP) override;
bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
return true;
}
};
} // namespace clang::tidy::readability
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_USECONCISEPREPROCESSORDIRECTIVESCHECK_H