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1//===----------------------------------------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_GOOGLE_USINGNAMESPACEDIRECTIVECHECK_H10#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_GOOGLE_USINGNAMESPACEDIRECTIVECHECK_H11 12#include "../ClangTidyCheck.h"13 14namespace clang::tidy::google::build {15 16/// Finds using namespace directives.17///18/// https://google.github.io/styleguide/cppguide.html#Namespaces19///20/// The check implements the following rule of the Google C++ Style Guide:21///22/// You may not use a using-directive to make all names from a namespace23/// available.24///25/// \code26/// // Forbidden -- This pollutes the namespace.27/// using namespace foo;28/// \endcode29///30/// Corresponding cpplint.py check name: `build/namespaces`.31///32/// For the user-facing documentation see:33/// https://clang.llvm.org/extra/clang-tidy/checks/google/build-using-namespace.html34class UsingNamespaceDirectiveCheck : public ClangTidyCheck {35public:36 UsingNamespaceDirectiveCheck(StringRef Name, ClangTidyContext *Context)37 : ClangTidyCheck(Name, Context) {}38 bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {39 return LangOpts.CPlusPlus;40 }41 void registerMatchers(ast_matchers::MatchFinder *Finder) override;42 void check(const ast_matchers::MatchFinder::MatchResult &Result) override;43 44private:45 static bool isStdLiteralsNamespace(const NamespaceDecl *NS);46};47 48} // namespace clang::tidy::google::build49 50#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_GOOGLE_USINGNAMESPACEDIRECTIVECHECK_H51