clang-tools  5.0.0
ProTypeUnionAccessCheck.cpp
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1 //===--- ProTypeUnionAccessCheck.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 cppcoreguidelines {
19 
20 void ProTypeUnionAccessCheck::registerMatchers(MatchFinder *Finder) {
21  if (!getLangOpts().CPlusPlus)
22  return;
23 
24  Finder->addMatcher(
25  memberExpr(hasObjectExpression(hasType(recordDecl(isUnion()))))
26  .bind("expr"),
27  this);
28 }
29 
30 void ProTypeUnionAccessCheck::check(const MatchFinder::MatchResult &Result) {
31  const auto *Matched = Result.Nodes.getNodeAs<MemberExpr>("expr");
32  diag(Matched->getMemberLoc(),
33  "do not access members of unions; use (boost::)variant instead");
34 }
35 
36 } // namespace cppcoreguidelines
37 } // namespace tidy
38 } // namespace clang
std::unique_ptr< ast_matchers::MatchFinder > Finder
Definition: ClangTidy.cpp:275