blob: f1e5af6cab2aa5e5f28ade1b98b2625b0ddcf5be (
plain)
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
48
49
50
51
52
53
54
55
|
// RUN: %clang_cc1 -std=c++2c -fexperimental-new-constant-interpreter -verify=expected,both %s
// RUN: %clang_cc1 -std=c++2c -verify=ref,both %s
/// This example used to cause an invalid read because allocating
/// an array needs to return a pointer to the first element,
/// not to the array.
namespace std {
using size_t = decltype(sizeof(0));
template <class _Tp>
class allocator {
public:
typedef size_t size_type;
typedef _Tp value_type;
constexpr _Tp *allocate(size_t __n) {
return static_cast<_Tp *>(::operator new(__n * sizeof(_Tp)));
}
};
}
void *operator new(std::size_t, void *p) { return p; }
void* operator new[] (std::size_t, void* p) {return p;}
namespace std {
template <class _Ep>
class initializer_list {
const _Ep *__begin_;
__SIZE_TYPE__ __size_;
public:
typedef _Ep value_type;
typedef const _Ep &reference;
constexpr __SIZE_TYPE__ size() const noexcept { return __size_; }
constexpr const _Ep *begin() const noexcept { return __begin_; }
constexpr const _Ep *end() const noexcept { return __begin_ + __size_; }
};
}
template<typename T>
class vector {
public:
constexpr vector(std::initializer_list<T> Ts) {
A = B = std::allocator<T>{}.allocate(Ts.size()); // both-note {{heap allocation performed here}}
new (A) T(*Ts.begin());
}
private:
T *A = nullptr;
T *B = nullptr;
};
constexpr vector<vector<int>> ints = {{3}, {4}}; // both-error {{must be initialized by a constant expression}} \
// both-note {{pointer to}}
|
