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1 //===--- MultipleInheritanceCheck.h - clang-tidy-----------------*- C++ -*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_FUCHSIA_MULTIPLE_INHERITANCE_H
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10 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_FUCHSIA_MULTIPLE_INHERITANCE_H
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11
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12 #include "../ClangTidyCheck.h"
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13
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14 namespace clang::tidy::fuchsia {
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15
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16 /// Multiple implementation inheritance is discouraged.
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17 ///
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18 /// For the user-facing documentation see:
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19 /// http://clang.llvm.org/extra/clang-tidy/checks/fuchsia/multiple-inheritance.html
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20 class MultipleInheritanceCheck : public ClangTidyCheck {
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21 public:
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22 MultipleInheritanceCheck(StringRef Name, ClangTidyContext *Context)
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23 : ClangTidyCheck(Name, Context) {}
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24 bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
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25 return LangOpts.CPlusPlus;
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26 }
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27 void registerMatchers(ast_matchers::MatchFinder *Finder) override;
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28 void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
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29
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30 void onEndOfTranslationUnit() override { InterfaceMap.clear(); }
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31
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32 private:
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33 void addNodeToInterfaceMap(const CXXRecordDecl *Node, bool IsInterface);
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34 bool getInterfaceStatus(const CXXRecordDecl *Node, bool &IsInterface) const;
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35 bool isCurrentClassInterface(const CXXRecordDecl *Node) const;
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36 bool isInterface(const CXXRecordDecl *Node);
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37
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38 // Contains the identity of each named CXXRecord as an interface. This is
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39 // used to memoize lookup speeds and improve performance from O(N^2) to O(N),
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40 // where N is the number of classes.
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41 llvm::StringMap<bool> InterfaceMap;
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42 };
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43
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44 } // namespace clang::tidy::fuchsia
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45
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46 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_FUCHSIA_MULTIPLE_INHERITANCE_H
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