1 //===--- OverloadedUnaryAndCheck.cpp - clang-tidy ---------------*- C++ -*-===// 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 "OverloadedUnaryAndCheck.h" 10 #include "clang/AST/ASTContext.h" 11 #include "clang/ASTMatchers/ASTMatchFinder.h" 12 #include "clang/ASTMatchers/ASTMatchers.h" 13 14 using namespace clang::ast_matchers; 15 16 namespace clang::tidy::google::runtime { 17 registerMatchers(ast_matchers::MatchFinder * Finder)18void OverloadedUnaryAndCheck::registerMatchers( 19 ast_matchers::MatchFinder *Finder) { 20 // Match unary methods that overload operator&. 21 Finder->addMatcher( 22 cxxMethodDecl(parameterCountIs(0), hasOverloadedOperatorName("&")) 23 .bind("overload"), 24 this); 25 // Also match freestanding unary operator& overloads. Be careful not to match 26 // binary methods. 27 Finder->addMatcher(functionDecl(unless(cxxMethodDecl()), parameterCountIs(1), 28 hasOverloadedOperatorName("&")) 29 .bind("overload"), 30 this); 31 } 32 check(const MatchFinder::MatchResult & Result)33void OverloadedUnaryAndCheck::check(const MatchFinder::MatchResult &Result) { 34 const auto *Decl = Result.Nodes.getNodeAs<FunctionDecl>("overload"); 35 diag(Decl->getBeginLoc(), 36 "do not overload unary operator&, it is dangerous."); 37 } 38 39 } // namespace clang::tidy::google::runtime 40