clang-tools-extra/clang-tidy/fuchsia/MultipleInheritanceCheck.h

   1 //===--- MultipleInheritanceCheck.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_FUCHSIA_MULTIPLE_INHERITANCE_H
  10 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_FUCHSIA_MULTIPLE_INHERITANCE_H
  11
  12 #include "../ClangTidyCheck.h"
  13
  14 namespace clang {
  15 namespace tidy {
  16 namespace fuchsia {
  17
  18 /// Multiple implementation inheritance is discouraged.
  19 ///
  20 /// For the user-facing documentation see:
  21 /// http://clang.llvm.org/extra/clang-tidy/checks/fuchsia/multiple-inheritance.html
  22 class MultipleInheritanceCheck : public ClangTidyCheck {
  23 public:
  24   MultipleInheritanceCheck(StringRef Name, ClangTidyContext *Context)
  25       : ClangTidyCheck(Name, Context) {}
  26   bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
  27     return LangOpts.CPlusPlus;
  28   }
  29   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
  30   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
  31
  32   void onEndOfTranslationUnit() override { InterfaceMap.clear(); }
  33
  34 private:
  35   void addNodeToInterfaceMap(const CXXRecordDecl *Node, bool IsInterface);
  36   bool getInterfaceStatus(const CXXRecordDecl *Node, bool &IsInterface) const;
  37   bool isCurrentClassInterface(const CXXRecordDecl *Node) const;
  38   bool isInterface(const CXXRecordDecl *Node);
  39
  40   // Contains the identity of each named CXXRecord as an interface.  This is
  41   // used to memoize lookup speeds and improve performance from O(N^2) to O(N),
  42   // where N is the number of classes.
  43   llvm::StringMap<bool> InterfaceMap;
  44 };
  45
  46 } // namespace fuchsia
  47 } // namespace tidy
  48 } // namespace clang
  49
  50 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_FUCHSIA_MULTIPLE_INHERITANCE_H