clang-tools-extra/clang-tidy/google/UnnamedNamespaceInHeaderCheck.cpp

   1 //===--- UnnamedNamespaceInHeaderCheck.cpp - clang-tidy ---------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "UnnamedNamespaceInHeaderCheck.h"
  10 #include "clang/AST/ASTContext.h"
  11 #include "clang/ASTMatchers/ASTMatchFinder.h"
  12 #include "clang/ASTMatchers/ASTMatchers.h"
  13
  14 using namespace clang::ast_matchers;
  15
  16 namespace clang::tidy::google::build {
  17
  18 UnnamedNamespaceInHeaderCheck::UnnamedNamespaceInHeaderCheck(
  19     StringRef Name, ClangTidyContext *Context)
  20     : ClangTidyCheck(Name, Context),
  21       HeaderFileExtensions(Context->getHeaderFileExtensions()) {}
  22
  23 void UnnamedNamespaceInHeaderCheck::registerMatchers(
  24     ast_matchers::MatchFinder *Finder) {
  25     Finder->addMatcher(namespaceDecl(isAnonymous()).bind("anonymousNamespace"),
  26                        this);
  27 }
  28
  29 void UnnamedNamespaceInHeaderCheck::check(
  30     const MatchFinder::MatchResult &Result) {
  31   const auto *N = Result.Nodes.getNodeAs<NamespaceDecl>("anonymousNamespace");
  32   SourceLocation Loc = N->getBeginLoc();
  33   if (!Loc.isValid())
  34     return;
  35
  36   if (utils::isPresumedLocInHeaderFile(Loc, *Result.SourceManager,
  37                                        HeaderFileExtensions))
  38     diag(Loc, "do not use unnamed namespaces in header files");
  39 }
  40
  41 } // namespace clang::tidy::google::build