46 lines · cpp
1//===----------------------------------------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#include "AvoidCapturingLambdaCoroutinesCheck.h"10#include "clang/AST/ASTContext.h"11#include "clang/ASTMatchers/ASTMatchFinder.h"12 13using namespace clang::ast_matchers;14 15namespace clang::tidy::cppcoreguidelines {16 17namespace {18AST_MATCHER(LambdaExpr, hasCoroutineBody) {19 const Stmt *Body = Node.getBody();20 return Body != nullptr && CoroutineBodyStmt::classof(Body);21}22 23AST_MATCHER(LambdaExpr, hasCaptures) { return Node.capture_size() != 0U; }24} // namespace25 26void AvoidCapturingLambdaCoroutinesCheck::registerMatchers(27 MatchFinder *Finder) {28 Finder->addMatcher(29 lambdaExpr(hasCaptures(), hasCoroutineBody()).bind("lambda"), this);30}31 32bool AvoidCapturingLambdaCoroutinesCheck::isLanguageVersionSupported(33 const LangOptions &LangOpts) const {34 return LangOpts.CPlusPlus20;35}36 37void AvoidCapturingLambdaCoroutinesCheck::check(38 const MatchFinder::MatchResult &Result) {39 const auto *MatchedLambda = Result.Nodes.getNodeAs<LambdaExpr>("lambda");40 diag(MatchedLambda->getExprLoc(),41 "coroutine lambda may cause use-after-free, avoid captures or ensure "42 "lambda closure object has guaranteed lifetime");43}44 45} // namespace clang::tidy::cppcoreguidelines46