llvm/clang-tools-extra/clang-tidy/utils/IncludeInserter.h

//===---------- IncludeInserter.h - clang-tidy ----------------------------===//
//
// 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_INCLUDEINSERTER_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_INCLUDEINSERTER_H

#include "IncludeSorter.h"
#include "clang/Basic/Diagnostic.h"
#include "llvm/ADT/StringSet.h"
#include <memory>
#include <optional>

namespace clang {
class Preprocessor;
namespace tidy::utils {

/// Produces fixes to insert specified includes to source files, if not
/// yet present.
///
/// ``IncludeInserter`` can be used in clang-tidy checks in the following way:
/// \code
/// #include "../ClangTidyCheck.h"
/// #include "../utils/IncludeInserter.h"
///
/// namespace clang {
/// namespace tidy {
///
/// class MyCheck : public ClangTidyCheck {
///  public:
///   void registerPPCallbacks(const SourceManager &SM, Preprocessor *PP,
///                            Preprocessor *ModuleExpanderPP) override {
///     Inserter.registerPreprocessor(PP);
///   }
///
///   void registerMatchers(ast_matchers::MatchFinder* Finder) override { ... }
///
///   void check(
///       const ast_matchers::MatchFinder::MatchResult& Result) override {
///     ...
///     Inserter.createMainFileIncludeInsertion("path/to/Header.h");
///     ...
///   }
///
///  private:
///   utils::IncludeInserter Inserter{utils::IncludeSorter::IS_Google};
/// };
/// } // namespace tidy
/// } // namespace clang
/// \endcode
class IncludeInserter { … };

} // namespace tidy::utils
} // namespace clang
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_INCLUDEINSERTER_H