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

 /*
     SPDX-FileCopyrightText: 2017 Sergio Martins <smartins@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "lambda-unique-connection.h"
 #include "HierarchyUtils.h"
 #include "QtUtils.h"
 
 #include <clang/AST/Decl.h>
 #include <clang/AST/DeclTemplate.h>
 #include <clang/AST/Expr.h>
 #include <clang/AST/Stmt.h>
 #include <clang/Basic/LLVM.h>
 #include <llvm/ADT/StringRef.h>
 #include <llvm/Support/Casting.h>
 
 #include <vector>
 
 class ClazyContext;
 namespace clang
 {
 class CXXMethodDecl;
 } // namespace clang
 
 using namespace clang;
 
 LambdaUniqueConnection::LambdaUniqueConnection(const std::string &name, ClazyContext *context)
     : CheckBase(name, context, Option_CanIgnoreIncludes)
 {
 }
 
 void LambdaUniqueConnection::VisitStmt(clang::Stmt *stmt)
 {
     auto *call = dyn_cast<CallExpr>(stmt);
     if (!call) {
         return;
     }
 
     // We want this signature:
     // connect(const QObject *sender, PointerToMemberFunction signal, const QObject *context, Functor functor, Qt::ConnectionType type)
 
     FunctionDecl *func = call->getDirectCallee();
     if (!func || func->getNumParams() != 5 || !func->isTemplateInstantiation() || !clazy::isConnect(func) || !clazy::connectHasPMFStyle(func)) {
         return;
     }
 
     Expr *typeArg = call->getArg(4); // The type
 
     std::vector<DeclRefExpr *> result;
     clazy::getChilds(typeArg, result);
 
     bool found = false;
     for (auto *declRef : result) {
         if (auto *enumConstant = dyn_cast<EnumConstantDecl>(declRef->getDecl())) {
             if (clazy::name(enumConstant) == "UniqueConnection") {
                 found = true;
                 break;
             }
         }
     }
 
     if (!found) {
         return;
     }
 
     FunctionTemplateSpecializationInfo *tsi = func->getTemplateSpecializationInfo();
     if (!tsi) {
         return;
     }
     FunctionTemplateDecl *temp = tsi->getTemplate();
     const TemplateParameterList *tempParams = temp->getTemplateParameters();
     if (tempParams->size() != 2) {
         return;
     }
 
     CXXMethodDecl *method = clazy::pmfFromConnect(call, 3);
     if (method) {
         // How else to detect if it's the right overload ? It's all templated stuff with the same
         // names for all the template arguments
         return;
     }
 
     emitWarning(typeArg, "UniqueConnection is not supported with non-member functions");
 }