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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 {
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15 namespace tidy {
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16 namespace fuchsia {
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17
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18 /// Multiple implementation inheritance is discouraged.
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19 ///
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20 /// For the user-facing documentation see:
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21 /// http://clang.llvm.org/extra/clang-tidy/checks/fuchsia-multiple-inheritance.html
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22 class MultipleInheritanceCheck : public ClangTidyCheck {
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23 public:
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24 MultipleInheritanceCheck(StringRef Name, ClangTidyContext *Context)
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25 : ClangTidyCheck(Name, Context) {}
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26 bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
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27 return LangOpts.CPlusPlus;
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28 }
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29 void registerMatchers(ast_matchers::MatchFinder *Finder) override;
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30 void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
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31
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32 void onEndOfTranslationUnit() override { InterfaceMap.clear(); }
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33
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34 private:
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35 void addNodeToInterfaceMap(const CXXRecordDecl *Node, bool isInterface);
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36 bool getInterfaceStatus(const CXXRecordDecl *Node, bool &isInterface) const;
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37 bool isCurrentClassInterface(const CXXRecordDecl *Node) const;
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38 bool isInterface(const CXXRecordDecl *Node);
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39
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40 // Contains the identity of each named CXXRecord as an interface. This is
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41 // used to memoize lookup speeds and improve performance from O(N^2) to O(N),
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42 // where N is the number of classes.
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43 llvm::StringMap<bool> InterfaceMap;
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44 };
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45
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46 } // namespace fuchsia
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47 } // namespace tidy
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48 } // namespace clang
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49
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50 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_FUCHSIA_MULTIPLE_INHERITANCE_H
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