clang-tools  5.0.0
DontModifyStdNamespaceCheck.cpp
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1 //===--- DontModifyStdNamespaceCheck.cpp - clang-tidy----------------------===//
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 
14 using namespace clang::ast_matchers;
15 
16 namespace clang {
17 namespace tidy {
18 namespace cert {
19 
20 void DontModifyStdNamespaceCheck::registerMatchers(MatchFinder *Finder) {
21  if (!getLangOpts().CPlusPlus)
22  return;
23 
24  Finder->addMatcher(
25  namespaceDecl(unless(isExpansionInSystemHeader()),
26  anyOf(hasName("std"), hasName("posix")),
27  has(decl(unless(anyOf(
28  functionDecl(isExplicitTemplateSpecialization()),
29  cxxRecordDecl(isExplicitTemplateSpecialization()))))))
30  .bind("nmspc"),
31  this);
32 }
33 
34 void DontModifyStdNamespaceCheck::check(
35  const MatchFinder::MatchResult &Result) {
36  const auto *N = Result.Nodes.getNodeAs<NamespaceDecl>("nmspc");
37 
38  // Only consider top level namespaces.
39  if (N->getParent() != Result.Context->getTranslationUnitDecl())
40  return;
41 
42  diag(N->getLocation(),
43  "modification of %0 namespace can result in undefined behavior")
44  << N;
45 }
46 
47 } // namespace cert
48 } // namespace tidy
49 } // namespace clang
std::unique_ptr< ast_matchers::MatchFinder > Finder
Definition: ClangTidy.cpp:275