| Issue |
204082
|
| Summary |
[libcxx] `std::get_temporary_buffer` breaks standard
|
| Labels |
libc++
|
| Assignees |
|
| Reporter |
futog
|
```
#include <cassert>
#include <memory>
#include <utility>
struct A {
int x;
};
int main() {
std::pair<A *, std::ptrdiff_t> buff = std::get_temporary_buffer<A>(-1);
assert(buff.first == nullptr); // OK
assert(buff.second == 0); // NOK, == -1
}
```
>From the standard ISO/IEC 14882:2017:
```
D.11 Temporary buffers
template <class T>
pair<T*, ptrdiff_t> get_temporary_buffer(ptrdiff_t n) noexcept;
Returns: If n <= 0 or if no storage could be obtained, returns a pair P such that P.first is a null pointer value and P.second == 0; otherwise returns a pair P such that P.first refers to the address of the uninitialized storage and P.second refers to its capacity N (in the units of sizeof(T)).
```
Note: Note: deprecated in C++17, removed from C++20
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