MultipleInheritanceCheck.h

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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_FUCHSIA_MULTIPLEINHERITANCECHECK_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_FUCHSIA_MULTIPLEINHERITANCECHECK_H
 
#include "../ClangTidyCheck.h"
 
namespace clang::tidy::fuchsia {
 
/// Multiple implementation inheritance is discouraged.
///
/// For the user-facing documentation see:
/// https://clang.llvm.org/extra/clang-tidy/checks/fuchsia/multiple-inheritance.html
class MultipleInheritanceCheck : public ClangTidyCheck {
public:
  MultipleInheritanceCheck(StringRef Name, ClangTidyContext *Context)
      : ClangTidyCheck(Name, Context) {}
  bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
    return LangOpts.CPlusPlus;
  }
  void registerMatchers(ast_matchers::MatchFinder *Finder) override;
  void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 
  void onEndOfTranslationUnit() override { InterfaceMap.clear(); }
 
private:
  bool isInterface(const CXXBaseSpecifier &Base);
 
  // Contains the identity of each named CXXRecord as an interface.  This is
  // used to memoize lookup speeds and improve performance from O(N^2) to O(N),
  // where N is the number of classes.
  llvm::DenseMap<const CXXRecordDecl *, bool> InterfaceMap;
};
 
} // namespace clang::tidy::fuchsia
 
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_FUCHSIA_MULTIPLEINHERITANCECHECK_H