1 //===--- OverloadedOperatorCheck.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 "OverloadedOperatorCheck.h"
10 
11 using namespace clang::ast_matchers;
12 
13 namespace clang {
14 namespace tidy {
15 namespace fuchsia {
16 
17 namespace {
AST_MATCHER(FunctionDecl,isFuchsiaOverloadedOperator)18 AST_MATCHER(FunctionDecl, isFuchsiaOverloadedOperator) {
19   if (const auto *CXXMethodNode = dyn_cast<CXXMethodDecl>(&Node)) {
20     if (CXXMethodNode->isCopyAssignmentOperator() ||
21         CXXMethodNode->isMoveAssignmentOperator())
22       return false;
23     if (CXXMethodNode->getParent()->isLambda())
24       return false;
25   }
26   return Node.isOverloadedOperator();
27 }
28 } // namespace
29 
registerMatchers(MatchFinder * Finder)30 void OverloadedOperatorCheck::registerMatchers(MatchFinder *Finder) {
31   Finder->addMatcher(functionDecl(isFuchsiaOverloadedOperator()).bind("decl"),
32                      this);
33 }
34 
check(const MatchFinder::MatchResult & Result)35 void OverloadedOperatorCheck::check(const MatchFinder::MatchResult &Result) {
36   const auto *D = Result.Nodes.getNodeAs<FunctionDecl>("decl");
37   assert(D && "No FunctionDecl captured!");
38 
39   SourceLocation Loc = D->getBeginLoc();
40   if (Loc.isValid())
41     diag(Loc, "overloading %0 is disallowed") << D;
42 }
43 
44 } // namespace fuchsia
45 } // namespace tidy
46 } // namespace clang
47