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 
14 namespace clang {
15 namespace tidy {
16 namespace google {
17 namespace build {
18 
19 /// Finds using namespace directives.
20 ///
21 /// https://google.github.io/styleguide/cppguide.html#Namespaces
22 ///
23 /// The check implements the following rule of the Google C++ Style Guide:
24 ///
25 ///   You may not use a using-directive to make all names from a namespace
26 ///   available.
27 ///
28 ///   \code
29 ///     // Forbidden -- This pollutes the namespace.
30 ///     using namespace foo;
31 ///   \endcode
32 ///
33 /// Corresponding cpplint.py check name: `build/namespaces`.
34 class UsingNamespaceDirectiveCheck : public ClangTidyCheck {
35 public:
36   UsingNamespaceDirectiveCheck(StringRef Name, ClangTidyContext *Context)
37       : ClangTidyCheck(Name, Context) {}
38   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
39   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
40 
41 private:
42   static bool isStdLiteralsNamespace(const NamespaceDecl *NS);
43 };
44 
45 } // namespace build
46 } // namespace google
47 } // namespace tidy
48 } // namespace clang
49 
50 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_GOOGLE_USINGNAMESPACEDIRECTIVECHECK_H
51