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: MultipleInheritanceCheck(StringRef Name,ClangTidyContext * Context)24 MultipleInheritanceCheck(StringRef Name, ClangTidyContext *Context) 25 : ClangTidyCheck(Name, Context) {} isLanguageVersionSupported(const LangOptions & LangOpts)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 onEndOfTranslationUnit()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 51