test/std/utilities/memory/default.allocator/allocator.members/allocate.size.pass.cpp


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: libcpp-no-exceptions
// <memory>

// allocator:
// pointer allocate(size_type n, allocator<void>::const_pointer hint=0);

#include <memory>
#include <cassert>

#include "test_macros.h"

template <typename T>
void test_max(size_t count)
{
    std::allocator<T> a;
    try {
        TEST_IGNORE_NODISCARD a.allocate(count);
        assert(false);
    } catch (const std::exception &) {
    }
}

template <typename T>
void test()
{
    // Bug 26812 -- allocating too large
    std::allocator<T> a;
    test_max<T> (a.max_size() + 1);                // just barely too large
    test_max<T> (a.max_size() * 2);                // significantly too large
    test_max<T> (((size_t) -1) / sizeof(T) + 1);   // multiply will overflow
    test_max<T> ((size_t) -1);                     // way too large
}

int main()
{
    test<double>();
    LIBCPP_ONLY(test<const double>());
}