1//===--- UsingNamespaceDirectiveCheck.h - clang-tidy ------------*- C++ -*-===//
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-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_GOOGLE_USINGNAMESPACEDIRECTIVECHECK_H
10#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_GOOGLE_USINGNAMESPACEDIRECTIVECHECK_H
11
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#Namespaces
19///
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 namespace
23/// available.
24///
25/// \code
26/// // Forbidden -- This pollutes the namespace.
27/// using namespace foo;
28/// \endcode
29///
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.html
34class 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::build
49
50#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_GOOGLE_USINGNAMESPACEDIRECTIVECHECK_H
51

source code of clang-tools-extra/clang-tidy/google/UsingNamespaceDirectiveCheck.h