1 //===--- UsingNamespaceDirectiveCheck.h - clang-tidy ------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_GOOGLE_USINGNAMESPACEDIRECTIVECHECK_H
11 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_GOOGLE_USINGNAMESPACEDIRECTIVECHECK_H
12 
13 #include "../ClangTidy.h"
14 
15 namespace clang {
16 namespace tidy {
17 namespace google {
18 namespace build {
19 
20 /// Finds using namespace directives.
21 ///
22 /// https://google.github.io/styleguide/cppguide.html#Namespaces
23 ///
24 /// The check implements the following rule of the Google C++ Style Guide:
25 ///
26 ///   You may not use a using-directive to make all names from a namespace
27 ///   available.
28 ///
29 ///   \code
30 ///     // Forbidden -- This pollutes the namespace.
31 ///     using namespace foo;
32 ///   \endcode
33 ///
34 /// Corresponding cpplint.py check name: `build/namespaces`.
35 class UsingNamespaceDirectiveCheck : public ClangTidyCheck {
36 public:
37   UsingNamespaceDirectiveCheck(StringRef Name, ClangTidyContext *Context)
38       : ClangTidyCheck(Name, Context) {}
39   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
40   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
41 
42 private:
43   static bool isStdLiteralsNamespace(const NamespaceDecl *NS);
44 };
45 
46 } // namespace build
47 } // namespace google
48 } // namespace tidy
49 } // namespace clang
50 
51 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_GOOGLE_USINGNAMESPACEDIRECTIVECHECK_H
52