clang-tools  3.8.0
UnnamedNamespaceInHeaderCheck.cpp
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1 //===--- UnnamedNamespaceInHeaderCheck.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 
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 UnnamedNamespaceInHeaderCheck::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(namespaceDecl(isAnonymous()).bind("anonymousNamespace"),
28  this);
29 }
30 
31 void
32 UnnamedNamespaceInHeaderCheck::check(const MatchFinder::MatchResult &Result) {
33  SourceManager *SM = Result.SourceManager;
34  const auto *N = Result.Nodes.getNodeAs<NamespaceDecl>("anonymousNamespace");
35  SourceLocation Loc = N->getLocStart();
36  if (!Loc.isValid())
37  return;
38 
39  // Look if we're inside a header, check for common suffixes only.
40  // TODO: Allow configuring the set of file extensions.
41  StringRef FileName = SM->getPresumedLoc(Loc).getFilename();
42  if (FileName.endswith(".h") || FileName.endswith(".hh") ||
43  FileName.endswith(".hpp") || FileName.endswith(".hxx"))
44  diag(Loc, "do not use unnamed namespaces in header files");
45 }
46 
47 } // namespace build
48 } // namespace google
49 } // namespace tidy
50 } // namespace clang
SourceLocation Loc
'#' location in the include directive
std::unique_ptr< ast_matchers::MatchFinder > Finder
Definition: ClangTidy.cpp:188
SourceManager & SM
const NamedDecl * Result
Definition: USRFinder.cpp:121