clang-tools-extra/clang-tidy/abseil/NoNamespaceCheck.cpp

   1 //===--- NoNamespaceCheck.cpp - clang-tidy---------------------------------===//
   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 "NoNamespaceCheck.h"
  10 #include "AbseilMatcher.h"
  11 #include "clang/AST/ASTContext.h"
  12 #include "clang/ASTMatchers/ASTMatchFinder.h"
  13
  14 using namespace clang::ast_matchers;
  15
  16 namespace clang::tidy::abseil {
  17
  18 void NoNamespaceCheck::registerMatchers(MatchFinder *Finder) {
  19   Finder->addMatcher(
  20       namespaceDecl(hasName("::absl"), unless(isInAbseilFile()))
  21           .bind("abslNamespace"),
  22       this);
  23 }
  24
  25 void NoNamespaceCheck::check(const MatchFinder::MatchResult &Result) {
  26   const auto *AbslNamespaceDecl =
  27       Result.Nodes.getNodeAs<NamespaceDecl>("abslNamespace");
  28
  29   diag(AbslNamespaceDecl->getLocation(),
  30        "namespace 'absl' is reserved for implementation of the Abseil library "
  31        "and should not be opened in user code");
  32 }
  33
  34 } // namespace clang::tidy::abseil