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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
10 #include "UnnamedNamespaceInHeaderCheck.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 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
Loc
SourceLocation Loc
'#' location in the include directive
Definition: IncludeOrderCheck.cpp:34
Finder
std::unique_ptr< ast_matchers::MatchFinder > Finder
Definition: ClangTidy.cpp:188
SM
SourceManager & SM
Definition: IncludeOrderCheck.cpp:44
UnnamedNamespaceInHeaderCheck.h
Result
const NamedDecl * Result
Definition: USRFinder.cpp:121