15a83710eSEric Fiselier //===----------------------------------------------------------------------===// 25a83710eSEric Fiselier // 357b08b09SChandler Carruth // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 457b08b09SChandler Carruth // See https://llvm.org/LICENSE.txt for license information. 557b08b09SChandler Carruth // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 65a83710eSEric Fiselier // 75a83710eSEric Fiselier //===----------------------------------------------------------------------===// 85a83710eSEric Fiselier 95a83710eSEric Fiselier // <memory> 105a83710eSEric Fiselier 115a83710eSEric Fiselier // weak_ptr 125a83710eSEric Fiselier 135a83710eSEric Fiselier // void swap(weak_ptr& r); 145a83710eSEric Fiselier 155a83710eSEric Fiselier #include <memory> 165a83710eSEric Fiselier #include <cassert> 175a83710eSEric Fiselier 18*7fc6a556SMarshall Clow #include "test_macros.h" 19*7fc6a556SMarshall Clow 205a83710eSEric Fiselier struct A 215a83710eSEric Fiselier { 225a83710eSEric Fiselier static int count; 235a83710eSEric Fiselier AA245a83710eSEric Fiselier A() {++count;} AA255a83710eSEric Fiselier A(const A&) {++count;} ~AA265a83710eSEric Fiselier ~A() {--count;} 275a83710eSEric Fiselier }; 285a83710eSEric Fiselier 295a83710eSEric Fiselier int A::count = 0; 305a83710eSEric Fiselier main(int,char **)312df59c50SJF Bastienint main(int, char**) 325a83710eSEric Fiselier { 335a83710eSEric Fiselier { 345a83710eSEric Fiselier std::shared_ptr<A> p1(new A); 355a83710eSEric Fiselier std::weak_ptr<A> w1(p1); 365a83710eSEric Fiselier assert(w1.use_count() == 1); 375a83710eSEric Fiselier w1.reset(); 385a83710eSEric Fiselier assert(w1.use_count() == 0); 395a83710eSEric Fiselier assert(p1.use_count() == 1); 405a83710eSEric Fiselier } 415a83710eSEric Fiselier assert(A::count == 0); 422df59c50SJF Bastien 432df59c50SJF Bastien return 0; 445a83710eSEric Fiselier } 45