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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14
// <memory>
// template <class ForwardIt>
// void uninitialized_value_construct(ForwardIt, ForwardIt);
#include <memory>
#include <cstdlib>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
struct Counted {
static int count;
static int constructed;
static void reset() { count = constructed = 0; }
explicit Counted() { ++count; ++constructed; }
Counted(Counted const&) { assert(false); }
~Counted() { --count; }
friend void operator&(Counted) = delete;
};
int Counted::count = 0;
int Counted::constructed = 0;
struct ThrowsCounted {
static int count;
static int constructed;
static int throw_after;
static void reset() { throw_after = count = constructed = 0; }
explicit ThrowsCounted() {
++constructed;
if (throw_after > 0 && --throw_after == 0) {
TEST_THROW(1);
}
++count;
}
ThrowsCounted(ThrowsCounted const&) { assert(false); }
~ThrowsCounted() { --count; }
friend void operator&(ThrowsCounted) = delete;
};
int ThrowsCounted::count = 0;
int ThrowsCounted::constructed = 0;
int ThrowsCounted::throw_after = 0;
void test_ctor_throws()
{
#ifndef TEST_HAS_NO_EXCEPTIONS
using It = forward_iterator<ThrowsCounted*>;
const int N = 5;
alignas(ThrowsCounted) char pool[sizeof(ThrowsCounted)*N] = {};
ThrowsCounted* p = (ThrowsCounted*)pool;
try {
ThrowsCounted::throw_after = 4;
std::uninitialized_value_construct_n(It(p), N);
assert(false);
} catch (...) {}
assert(ThrowsCounted::count == 3);
assert(ThrowsCounted::constructed == 4); // forth construction throws
std::destroy(p, p+3);
assert(ThrowsCounted::count == 0);
#endif
}
void test_counted()
{
using It = forward_iterator<Counted*>;
const int N = 5;
alignas(Counted) char pool[sizeof(Counted)*N] = {};
Counted* p = (Counted*)pool;
It e = std::uninitialized_value_construct_n(It(p), 1);
assert(e == It(p+1));
assert(Counted::count == 1);
assert(Counted::constructed == 1);
e = std::uninitialized_value_construct_n(It(p+1), 4);
assert(e == It(p+N));
assert(Counted::count == 5);
assert(Counted::constructed == 5);
std::destroy(p, p+N);
assert(Counted::count == 0);
}
void test_value_initialized()
{
using It = forward_iterator<int*>;
const int N = 5;
int pool[N] = {-1, -1, -1, -1, -1};
int* p = pool;
It e = std::uninitialized_value_construct_n(It(p), 1);
assert(e == It(p+1));
assert(pool[0] == 0);
assert(pool[1] == -1);
e = std::uninitialized_value_construct_n(It(p+1), 4);
assert(e == It(p+N));
assert(pool[1] == 0);
assert(pool[2] == 0);
assert(pool[3] == 0);
assert(pool[4] == 0);
}
int main(int, char**)
{
test_counted();
test_value_initialized();
return 0;
}
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