131 lines
3.4 KiB
C++
131 lines
3.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <memory>
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// unique_ptr
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// Test swap
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#include <memory>
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#include <cassert>
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#include "test_macros.h"
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#include "deleter_types.h"
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struct A
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{
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int state_;
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static int count;
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TEST_CONSTEXPR_CXX23 A() : state_(0) {
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if (!TEST_IS_CONSTANT_EVALUATED)
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++count;
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}
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TEST_CONSTEXPR_CXX23 explicit A(int i) : state_(i) {
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if (!TEST_IS_CONSTANT_EVALUATED)
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++count;
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}
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TEST_CONSTEXPR_CXX23 A(const A& a) : state_(a.state_) {
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if (!TEST_IS_CONSTANT_EVALUATED)
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++count;
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}
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TEST_CONSTEXPR_CXX23 A& operator=(const A& a) {
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state_ = a.state_;
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return *this;
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}
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TEST_CONSTEXPR_CXX23 ~A() {
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if (!TEST_IS_CONSTANT_EVALUATED)
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--count;
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}
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friend TEST_CONSTEXPR_CXX23 bool operator==(const A& x, const A& y) { return x.state_ == y.state_; }
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};
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int A::count = 0;
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template <class T>
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struct NonSwappableDeleter {
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TEST_CONSTEXPR_CXX23 explicit NonSwappableDeleter(int) {}
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TEST_CONSTEXPR_CXX23 NonSwappableDeleter& operator=(NonSwappableDeleter const&) { return *this; }
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TEST_CONSTEXPR_CXX23 void operator()(T*) const {}
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private:
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NonSwappableDeleter(NonSwappableDeleter const&);
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};
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TEST_CONSTEXPR_CXX23 bool test() {
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{
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A* p1 = new A(1);
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std::unique_ptr<A, Deleter<A> > s1(p1, Deleter<A>(1));
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A* p2 = new A(2);
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std::unique_ptr<A, Deleter<A> > s2(p2, Deleter<A>(2));
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assert(s1.get() == p1);
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assert(*s1 == A(1));
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assert(s1.get_deleter().state() == 1);
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assert(s2.get() == p2);
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assert(*s2 == A(2));
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assert(s2.get_deleter().state() == 2);
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swap(s1, s2);
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assert(s1.get() == p2);
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assert(*s1 == A(2));
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assert(s1.get_deleter().state() == 2);
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assert(s2.get() == p1);
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assert(*s2 == A(1));
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assert(s2.get_deleter().state() == 1);
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if (!TEST_IS_CONSTANT_EVALUATED)
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assert(A::count == 2);
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}
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if (!TEST_IS_CONSTANT_EVALUATED)
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assert(A::count == 0);
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{
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A* p1 = new A[3];
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std::unique_ptr<A[], Deleter<A[]> > s1(p1, Deleter<A[]>(1));
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A* p2 = new A[3];
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std::unique_ptr<A[], Deleter<A[]> > s2(p2, Deleter<A[]>(2));
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assert(s1.get() == p1);
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assert(s1.get_deleter().state() == 1);
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assert(s2.get() == p2);
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assert(s2.get_deleter().state() == 2);
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swap(s1, s2);
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assert(s1.get() == p2);
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assert(s1.get_deleter().state() == 2);
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assert(s2.get() == p1);
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assert(s2.get_deleter().state() == 1);
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if (!TEST_IS_CONSTANT_EVALUATED)
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assert(A::count == 6);
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}
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if (!TEST_IS_CONSTANT_EVALUATED)
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assert(A::count == 0);
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#if TEST_STD_VER >= 11
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{
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// test that unique_ptr's specialized swap is disabled when the deleter
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// is non-swappable. Instead we should pick up the generic swap(T, T)
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// and perform 3 move constructions.
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typedef NonSwappableDeleter<int> D;
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D d(42);
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int x = 42;
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int y = 43;
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std::unique_ptr<int, D&> p(&x, d);
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std::unique_ptr<int, D&> p2(&y, d);
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std::swap(p, p2);
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}
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#endif
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return true;
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}
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int main(int, char**) {
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test();
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#if TEST_STD_VER >= 23
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static_assert(test());
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#endif
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return 0;
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}
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