File indexing completed on 2024-05-12 05:40:56

 /*
     SPDX-FileCopyrightText: 2016-2017 Sergio Martins <smartins@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "lambda-in-connect.h"
 #include "ClazyContext.h"
 #include "ContextUtils.h"
 #include "HierarchyUtils.h"
 #include "QtUtils.h"
 #include "StringUtils.h"
 
 #include <clang/AST/Decl.h>
 #include <clang/AST/Expr.h>
 #include <clang/AST/ExprCXX.h>
 #include <clang/AST/LambdaCapture.h>
 #include <clang/AST/Stmt.h>
 #include <clang/AST/Type.h>
 #include <clang/Basic/LLVM.h>
 #include <clang/Basic/Lambda.h>
 #include <llvm/ADT/iterator_range.h>
 #include <llvm/Support/Casting.h>
 
 using namespace clang;
 
 LambdaInConnect::LambdaInConnect(const std::string &name, ClazyContext *context)
     : CheckBase(name, context, Option_CanIgnoreIncludes)
 {
 }
 
 void LambdaInConnect::VisitStmt(clang::Stmt *stmt)
 {
     auto *lambda = dyn_cast<LambdaExpr>(stmt);
     if (!lambda) {
         return;
     }
 
     auto captures = lambda->captures();
     if (captures.begin() == captures.end()) {
         return;
     }
 
     auto *callExpr = clazy::getFirstParentOfType<CallExpr>(m_context->parentMap, lambda);
     if (clazy::qualifiedMethodName(callExpr) != "QObject::connect") {
         return;
     }
 
     ValueDecl *senderDecl = clazy::signalSenderForConnect(callExpr);
     if (senderDecl) {
         const Type *t = senderDecl->getType().getTypePtrOrNull();
         if (t && !t->isPointerType()) {
             return;
         }
     }
 
     ValueDecl *receiverDecl = clazy::signalReceiverForConnect(callExpr);
 
     for (auto capture : captures) {
         if (capture.getCaptureKind() == clang::LCK_ByRef) {
             auto *declForCapture = capture.getCapturedVar();
             if (declForCapture && declForCapture != receiverDecl && clazy::isValueDeclInFunctionContext(declForCapture)) {
                 emitWarning(capture.getLocation(), "captured local variable by reference might go out of scope before lambda is called");
             }
         }
     }
 }