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