4727272254
This patch overhauls both specializations of unique_ptr while implementing the following LWG issues: * LWG 2801 - This issue constrains unique_ptr's constructors when the deleter type is not default constructible. Additionally it adds SFINAE conditions to unique_ptr<T[]>::unique_ptr(Up). * LWG 2905 - This issue reworks the unique_ptr(pointer, /* see below */ deleter) constructors so that they correctly SFINAE when the deleter argument cannot be used to construct the stored deleter. * LWG 2520 - This issue fixes initializing unique_ptr<T[]> from nullptr. Libc++ had previously implemented this issue, but the suggested resolution still broke initialization from NULL. This patch re-works the unique_ptr<T[]>(Up, deleter) overloads so that they accept NULL as well as nullptr. llvm-svn: 300406
121 lines
3.6 KiB
C++
121 lines
3.6 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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// UNSUPPORTED: c++98, c++03
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// <memory>
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// unique_ptr
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// Test unique_ptr move assignment
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// test move assignment. Should only require a MoveConstructible deleter, or if
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// deleter is a reference, not even that.
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#include <memory>
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#include <utility>
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#include <cassert>
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#include "deleter_types.h"
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#include "unique_ptr_test_helper.h"
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struct GenericDeleter {
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void operator()(void*) const;
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};
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template <bool IsArray>
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void test_basic() {
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typedef typename std::conditional<IsArray, A[], A>::type VT;
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const int expect_alive = IsArray ? 5 : 1;
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{
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std::unique_ptr<VT> s1(newValue<VT>(expect_alive));
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A* p = s1.get();
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std::unique_ptr<VT> s2(newValue<VT>(expect_alive));
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assert(A::count == (expect_alive * 2));
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s2 = std::move(s1);
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assert(A::count == expect_alive);
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assert(s2.get() == p);
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assert(s1.get() == 0);
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}
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assert(A::count == 0);
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{
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std::unique_ptr<VT, Deleter<VT> > s1(newValue<VT>(expect_alive),
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Deleter<VT>(5));
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A* p = s1.get();
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std::unique_ptr<VT, Deleter<VT> > s2(newValue<VT>(expect_alive));
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assert(A::count == (expect_alive * 2));
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s2 = std::move(s1);
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assert(s2.get() == p);
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assert(s1.get() == 0);
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assert(A::count == expect_alive);
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assert(s2.get_deleter().state() == 5);
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assert(s1.get_deleter().state() == 0);
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}
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assert(A::count == 0);
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{
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CDeleter<VT> d1(5);
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std::unique_ptr<VT, CDeleter<VT>&> s1(newValue<VT>(expect_alive), d1);
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A* p = s1.get();
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CDeleter<VT> d2(6);
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std::unique_ptr<VT, CDeleter<VT>&> s2(newValue<VT>(expect_alive), d2);
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s2 = std::move(s1);
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assert(s2.get() == p);
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assert(s1.get() == 0);
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assert(A::count == expect_alive);
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assert(d1.state() == 5);
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assert(d2.state() == 5);
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}
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assert(A::count == 0);
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}
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template <bool IsArray>
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void test_sfinae() {
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typedef typename std::conditional<IsArray, int[], int>::type VT;
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{
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typedef std::unique_ptr<VT> U;
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static_assert(!std::is_assignable<U, U&>::value, "");
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static_assert(!std::is_assignable<U, const U&>::value, "");
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static_assert(!std::is_assignable<U, const U&&>::value, "");
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static_assert(std::is_nothrow_assignable<U, U&&>::value, "");
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}
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{
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typedef std::unique_ptr<VT, GenericDeleter> U;
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static_assert(!std::is_assignable<U, U&>::value, "");
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static_assert(!std::is_assignable<U, const U&>::value, "");
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static_assert(!std::is_assignable<U, const U&&>::value, "");
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static_assert(std::is_nothrow_assignable<U, U&&>::value, "");
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}
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{
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typedef std::unique_ptr<VT, NCDeleter<VT>&> U;
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static_assert(!std::is_assignable<U, U&>::value, "");
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static_assert(!std::is_assignable<U, const U&>::value, "");
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static_assert(!std::is_assignable<U, const U&&>::value, "");
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static_assert(std::is_nothrow_assignable<U, U&&>::value, "");
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}
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{
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typedef std::unique_ptr<VT, const NCDeleter<VT>&> U;
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static_assert(!std::is_assignable<U, U&>::value, "");
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static_assert(!std::is_assignable<U, const U&>::value, "");
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static_assert(!std::is_assignable<U, const U&&>::value, "");
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static_assert(std::is_nothrow_assignable<U, U&&>::value, "");
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}
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}
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int main() {
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{
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test_basic</*IsArray*/ false>();
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test_sfinae<false>();
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}
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{
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test_basic</*IsArray*/ true>();
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test_sfinae<true>();
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}
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}
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