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 UnnamedNamespaceInHeaderCheck::UnnamedNamespaceInHeaderCheck( 23 StringRef Name, ClangTidyContext *Context) 24 : ClangTidyCheck(Name, Context), 25 RawStringHeaderFileExtensions(Options.getLocalOrGlobal( 26 "HeaderFileExtensions", utils::defaultHeaderFileExtensions())) { 27 if (!utils::parseHeaderFileExtensions(RawStringHeaderFileExtensions, 28 HeaderFileExtensions, ',')) { 29 llvm::errs() << "Invalid header file extension: " 30 << RawStringHeaderFileExtensions << "\n"; 31 } 32 } 33 34 void UnnamedNamespaceInHeaderCheck::storeOptions( 35 ClangTidyOptions::OptionMap &Opts) { 36 Options.store(Opts, "HeaderFileExtensions", RawStringHeaderFileExtensions); 37 } 38 39 void UnnamedNamespaceInHeaderCheck::registerMatchers( 40 ast_matchers::MatchFinder *Finder) { 41 // Only register the matchers for C++; the functionality currently does not 42 // provide any benefit to other languages, despite being benign. 43 if (getLangOpts().CPlusPlus) 44 Finder->addMatcher(namespaceDecl(isAnonymous()).bind("anonymousNamespace"), 45 this); 46 } 47 48 void UnnamedNamespaceInHeaderCheck::check( 49 const MatchFinder::MatchResult &Result) { 50 const auto *N = Result.Nodes.getNodeAs<NamespaceDecl>("anonymousNamespace"); 51 SourceLocation Loc = N->getBeginLoc(); 52 if (!Loc.isValid()) 53 return; 54 55 if (utils::isPresumedLocInHeaderFile(Loc, *Result.SourceManager, 56 HeaderFileExtensions)) 57 diag(Loc, "do not use unnamed namespaces in header files"); 58 } 59 60 } // namespace build 61 } // namespace google 62 } // namespace tidy 63 } // namespace clang 64