1 | //===--- ProTypeUnionAccessCheck.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 "ProTypeUnionAccessCheck.h" |
10 | #include "clang/ASTMatchers/ASTMatchFinder.h" |
11 | |
12 | using namespace clang::ast_matchers; |
13 | |
14 | namespace clang::tidy::cppcoreguidelines { |
15 | |
16 | void ProTypeUnionAccessCheck::registerMatchers(MatchFinder *Finder) { |
17 | Finder->addMatcher( |
18 | NodeMatch: memberExpr(hasObjectExpression(InnerMatcher: hasType(InnerMatcher: recordDecl(isUnion())))) |
19 | .bind(ID: "expr"), |
20 | Action: this); |
21 | } |
22 | |
23 | void ProTypeUnionAccessCheck::check(const MatchFinder::MatchResult &Result) { |
24 | const auto *Matched = Result.Nodes.getNodeAs<MemberExpr>(ID: "expr"); |
25 | SourceLocation Loc = Matched->getMemberLoc(); |
26 | if (Loc.isInvalid()) |
27 | Loc = Matched->getBeginLoc(); |
28 | diag(Loc, Description: "do not access members of unions; consider using (boost::)variant " |
29 | "instead"); |
30 | } |
31 | |
32 | } // namespace clang::tidy::cppcoreguidelines |
33 |