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libcxx_old/test/std/utilities/smartptr/unique.ptr/unique.ptr.class/unique.ptr.asgn/null.pass.cpp

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C++

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <memory>
// unique_ptr
// Test unique_ptr move assignment
#include <memory>
#include <cassert>
#include "test_macros.h"
#include "unique_ptr_test_helper.h"
// test assignment from null
template <bool IsArray>
void test_basic() {
typedef typename std::conditional<IsArray, A[], A>::type VT;
const int expect_alive = IsArray ? 5 : 1;
{
std::unique_ptr<VT> s2(newValue<VT>(expect_alive));
assert(A::count == expect_alive);
s2 = NULL;
assert(A::count == 0);
assert(s2.get() == 0);
}
assert(A::count == 0);
}
int main(int, char**) {
test_basic</*IsArray*/ false>();
test_basic<true>();
return 0;
}