clang-tools-extra/clang-tidy/modernize/ShrinkToFitCheck.h

//===----------------------------------------------------------------------===//
//
// 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_MODERNIZE_SHRINKTOFITCHECK_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_SHRINKTOFITCHECK_H

#include "../ClangTidyCheck.h"

namespace clang::tidy::modernize {

/// Replace copy and swap tricks on shrinkable containers with the
/// `shrink_to_fit()` method call.
///
/// The `shrink_to_fit()` method is more readable and more effective than
/// the copy and swap trick to reduce the capacity of a shrinkable container.
/// Note that, the `shrink_to_fit()` method is only available in C++11 and up.
class ShrinkToFitCheck : public ClangTidyCheck {
public:
  ShrinkToFitCheck(StringRef Name, ClangTidyContext *Context)
      : ClangTidyCheck(Name, Context) {}
  bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
    return LangOpts.CPlusPlus11;
  }
  void registerMatchers(ast_matchers::MatchFinder *Finder) override;
  void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
  std::optional<TraversalKind> getCheckTraversalKind() const override {
    return TK_IgnoreUnlessSpelledInSource;
  }
};

} // namespace clang::tidy::modernize

#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_SHRINKTOFITCHECK_H