1 //===--- AvoidCapturingLambdaCoroutinesCheck.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 "AvoidCapturingLambdaCoroutinesCheck.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 
19 void AvoidCapturingLambdaCoroutinesCheck::registerMatchers(
20     MatchFinder *Finder) {
21   Finder->addMatcher(lambdaExpr().bind("lambda"), this);
22 }
23 
24 void AvoidCapturingLambdaCoroutinesCheck::check(
25     const MatchFinder::MatchResult &Result) {
26   const auto *Lambda = Result.Nodes.getNodeAs<LambdaExpr>("lambda");
27   if (!Lambda) {
28     return;
29   }
30 
31   const auto *Body = dyn_cast<CoroutineBodyStmt>(Lambda->getBody());
32   if (!Body) {
33     return;
34   }
35 
36   if (Lambda->captures().empty()) {
37     return;
38   }
39 
40   diag(Lambda->getBeginLoc(), "found capturing coroutine lambda");
41 }
42 
43 } // namespace cppcoreguidelines
44 } // namespace tidy
45 } // namespace clang
46