blob: 7b427b9ac1e4970ad931add0b949aa52d4b0e2ca (
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
|
//===----------------------------------------------------------------------===//
//
// 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: c++98, c++03, c++11
// <functional>
// Hashing a struct w/o a defined hash should *not* fail, but it should
// create a type that is not constructible and not callable.
// See also: https://cplusplus.github.io/LWG/lwg-defects.html#2543
#include <functional>
#include <cassert>
#include <type_traits>
#include "test_macros.h"
struct X {};
int main()
{
using H = std::hash<X>;
static_assert(!std::is_default_constructible<H>::value, "");
static_assert(!std::is_copy_constructible<H>::value, "");
static_assert(!std::is_move_constructible<H>::value, "");
static_assert(!std::is_copy_assignable<H>::value, "");
static_assert(!std::is_move_assignable<H>::value, "");
#if TEST_STD_VER > 14
static_assert(!std::is_invocable<H, X&>::value, "");
static_assert(!std::is_invocable<H, X const&>::value, "");
#endif
}
|
