clang-tidy/bugprone/TaggedUnionMemberCountCheck.h

0001 //===--- TaggedUnionMemberCountCheck.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_BUGPRONE_TAGGEDUNIONMEMBERCOUNTCHECK_H
0010 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_TAGGEDUNIONMEMBERCOUNTCHECK_H
0011
0012 #include "../ClangTidyCheck.h"
0013
0014 namespace clang::tidy::bugprone {
0015
0016 /// Gives warnings for tagged unions, where the number of tags is
0017 /// different from the number of data members inside the union.
0018 ///
0019 /// For the user-facing documentation see:
0020 /// http://clang.llvm.org/extra/clang-tidy/checks/bugprone/tagged-union-member-count.html
0021 class TaggedUnionMemberCountCheck : public ClangTidyCheck {
0022 public:
0023   TaggedUnionMemberCountCheck(StringRef Name, ClangTidyContext *Context);
0024   void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
0025   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
0026   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
0027
0028 private:
0029   const bool StrictMode;
0030   const bool EnableCountingEnumHeuristic;
0031   const std::vector<StringRef> CountingEnumPrefixes;
0032   const std::vector<StringRef> CountingEnumSuffixes;
0033
0034   std::pair<const std::size_t, const EnumConstantDecl *>
0035   getNumberOfEnumValues(const EnumDecl *ED);
0036   bool isCountingEnumLikeName(StringRef Name) const;
0037 };
0038
0039 } // namespace clang::tidy::bugprone
0040
0041 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_TAGGEDUNIONMEMBERCOUNTCHECK_H