clang-tools 3.8.0

- Main Page
- Namespaces
- Classes
- Files

- File List
- File Members

UsingNamespaceDirectiveCheck.cpp
Go to the documentation of this file.
1 //===--- UsingNamespaceDirectiveCheck.cpp - 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 #include "UsingNamespaceDirectiveCheck.h"
11 #include "clang/AST/ASTContext.h"
12 #include "clang/ASTMatchers/ASTMatchFinder.h"
13 #include "clang/ASTMatchers/ASTMatchers.h"
14
15 using namespace clang::ast_matchers;
16
17 namespace clang {
18 namespace tidy {
19 namespace google {
20 namespace build {
21
22 void UsingNamespaceDirectiveCheck::registerMatchers(
23 ast_matchers::MatchFinder *Finder) {
24 // Only register the matchers for C++; the functionality currently does not
25 // provide any benefit to other languages, despite being benign.
26 if (getLangOpts().CPlusPlus)
27 Finder->addMatcher(usingDirectiveDecl().bind("usingNamespace"), this);
28 }
29
30 void
31 UsingNamespaceDirectiveCheck::check(const MatchFinder::MatchResult &Result) {
32 const auto *U = Result.Nodes.getNodeAs<UsingDirectiveDecl>("usingNamespace");
33 SourceLocation Loc = U->getLocStart();
34 if (U->isImplicit() || !Loc.isValid())
35 return;
36
37 diag(Loc, "do not use namespace using-directives; "
38 "use using-declarations instead");
39 // TODO: We could suggest a list of using directives replacing the using
40 // namespace directive.
41 }
42
43 } // namespace build
44 } // namespace google
45 } // namespace tidy
46 } // namespace clang
Loc
SourceLocation Loc
'#' location in the include directive
Definition: IncludeOrderCheck.cpp:34
Finder
std::unique_ptr< ast_matchers::MatchFinder > Finder
Definition: ClangTidy.cpp:188
UsingNamespaceDirectiveCheck.h
Result
const NamedDecl * Result
Definition: USRFinder.cpp:121