541cb301a1
between C++03 and C++0x and its effect on exceptions, and another two to not test move construction when rvalue references are not available. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@135445 91177308-0d34-0410-b5e6-96231b3b80d8
103 lines
2.0 KiB
C++
103 lines
2.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <memory>
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// template<class Y> explicit shared_ptr(auto_ptr<Y>&& r);
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#include <memory>
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#include <new>
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#include <cstdlib>
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#include <cassert>
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bool throw_next = false;
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void* operator new(std::size_t s) throw(std::bad_alloc)
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{
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if (throw_next)
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throw std::bad_alloc();
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return std::malloc(s);
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}
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void operator delete(void* p) throw()
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{
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std::free(p);
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}
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struct B
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{
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static int count;
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B() {++count;}
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B(const B&) {++count;}
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virtual ~B() {--count;}
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};
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int B::count = 0;
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struct A
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: public B
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{
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static int count;
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A() {++count;}
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A(const A&) {++count;}
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~A() {--count;}
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};
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int A::count = 0;
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int main()
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{
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{
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std::auto_ptr<A> ptr(new A);
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A* raw_ptr = ptr.get();
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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std::shared_ptr<B> p(std::move(ptr));
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#else
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std::shared_ptr<B> p(ptr);
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#endif
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assert(A::count == 1);
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assert(B::count == 1);
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assert(p.use_count() == 1);
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assert(p.get() == raw_ptr);
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assert(ptr.get() == 0);
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}
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assert(A::count == 0);
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{
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std::auto_ptr<A> ptr(new A);
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A* raw_ptr = ptr.get();
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throw_next = true;
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try
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{
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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std::shared_ptr<B> p(std::move(ptr));
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#else
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std::shared_ptr<B> p(ptr);
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#endif
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assert(false);
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}
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catch (...)
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{
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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assert(A::count == 1);
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assert(B::count == 1);
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assert(ptr.get() == raw_ptr);
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#else
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// Without rvalue references, ptr got copied into
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// the shared_ptr destructor and the copy was
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// destroyed during unwinding.
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assert(A::count == 0);
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assert(B::count == 0);
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#endif
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}
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}
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assert(A::count == 0);
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}
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