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