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

   1 //===--- ShrinkToFitCheck.h - clang-tidy-------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_SHRINKTOFITCHECK_H
  10 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_SHRINKTOFITCHECK_H
  11
  12 #include "../ClangTidyCheck.h"
  13
  14 namespace clang::tidy::modernize {
  15
  16 /// Replace copy and swap tricks on shrinkable containers with the
  17 /// `shrink_to_fit()` method call.
  18 ///
  19 /// The `shrink_to_fit()` method is more readable and more effective than
  20 /// the copy and swap trick to reduce the capacity of a shrinkable container.
  21 /// Note that, the `shrink_to_fit()` method is only available in C++11 and up.
  22 class ShrinkToFitCheck : public ClangTidyCheck {
  23 public:
  24   ShrinkToFitCheck(StringRef Name, ClangTidyContext *Context)
  25       : ClangTidyCheck(Name, Context) {}
  26   bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
  27     return LangOpts.CPlusPlus11;
  28   }
  29   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
  30   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
  31   std::optional<TraversalKind> getCheckTraversalKind() const override {
  32     return TK_IgnoreUnlessSpelledInSource;
  33   }
  34 };
  35
  36 } // namespace clang::tidy::modernize
  37
  38 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_SHRINKTOFITCHECK_H