clang-tidy/fuchsia/MultipleInheritanceCheck.h

0001 //===--- MultipleInheritanceCheck.h - clang-tidy-----------------*- C++ -*-===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_FUCHSIA_MULTIPLE_INHERITANCE_H
0010 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_FUCHSIA_MULTIPLE_INHERITANCE_H
0011
0012 #include "../ClangTidyCheck.h"
0013
0014 namespace clang::tidy::fuchsia {
0015
0016 /// Multiple implementation inheritance is discouraged.
0017 ///
0018 /// For the user-facing documentation see:
0019 /// http://clang.llvm.org/extra/clang-tidy/checks/fuchsia/multiple-inheritance.html
0020 class MultipleInheritanceCheck : public ClangTidyCheck {
0021 public:
0022   MultipleInheritanceCheck(StringRef Name, ClangTidyContext *Context)
0023       : ClangTidyCheck(Name, Context) {}
0024   bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
0025     return LangOpts.CPlusPlus;
0026   }
0027   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
0028   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
0029
0030   void onEndOfTranslationUnit() override { InterfaceMap.clear(); }
0031
0032 private:
0033   void addNodeToInterfaceMap(const CXXRecordDecl *Node, bool IsInterface);
0034   bool getInterfaceStatus(const CXXRecordDecl *Node, bool &IsInterface) const;
0035   bool isCurrentClassInterface(const CXXRecordDecl *Node) const;
0036   bool isInterface(const CXXRecordDecl *Node);
0037
0038   // Contains the identity of each named CXXRecord as an interface.  This is
0039   // used to memoize lookup speeds and improve performance from O(N^2) to O(N),
0040   // where N is the number of classes.
0041   llvm::StringMap<bool> InterfaceMap;
0042 };
0043
0044 } // namespace clang::tidy::fuchsia
0045
0046 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_FUCHSIA_MULTIPLE_INHERITANCE_H