1 //===--- AvoidConstOrRefDataMembersCheck.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 "AvoidConstOrRefDataMembersCheck.h"
10 #include "clang/AST/ASTContext.h"
11 #include "clang/ASTMatchers/ASTMatchFinder.h"
12 
13 using namespace clang::ast_matchers;
14 
15 namespace clang {
16 namespace tidy {
17 namespace cppcoreguidelines {
18 namespace {
19 
20 AST_MATCHER(FieldDecl, isMemberOfLambda) {
21   return Node.getParent()->isLambda();
22 }
23 
24 } // namespace
25 
26 void AvoidConstOrRefDataMembersCheck::registerMatchers(MatchFinder *Finder) {
27   Finder->addMatcher(fieldDecl(unless(isMemberOfLambda()),
28                                hasType(hasCanonicalType(referenceType())))
29                          .bind("ref"),
30                      this);
31   Finder->addMatcher(fieldDecl(unless(isMemberOfLambda()),
32                                hasType(qualType(isConstQualified())))
33                          .bind("const"),
34                      this);
35 }
36 
37 void AvoidConstOrRefDataMembersCheck::check(
38     const MatchFinder::MatchResult &Result) {
39   if (const auto *MatchedDecl = Result.Nodes.getNodeAs<FieldDecl>("ref"))
40     diag(MatchedDecl->getLocation(), "member %0 of type %1 is a reference")
41         << MatchedDecl << MatchedDecl->getType();
42   if (const auto *MatchedDecl = Result.Nodes.getNodeAs<FieldDecl>("const"))
43     diag(MatchedDecl->getLocation(), "member %0 of type %1 is const qualified")
44         << MatchedDecl << MatchedDecl->getType();
45 }
46 
47 } // namespace cppcoreguidelines
48 } // namespace tidy
49 } // namespace clang
50