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:
MultipleInheritanceCheck(StringRef Name,ClangTidyContext * Context)22   MultipleInheritanceCheck(StringRef Name, ClangTidyContext *Context)
23       : ClangTidyCheck(Name, Context) {}
isLanguageVersionSupported(const LangOptions & LangOpts)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 
onEndOfTranslationUnit()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
47