transparent.pass.cpp
2.47 KB
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
56
57
58
59
60
//===----------------------------------------------------------------------===//
//
// 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++03, c++11
#include <functional>
#include <string>
#include "test_macros.h"
template <class T>
struct is_transparent
{
private:
struct two {char lx; char lxx;};
template <class U> static two test(...);
template <class U> static char test(typename U::is_transparent* = 0);
public:
static const bool value = sizeof(test<T>(0)) == 1;
};
int main(int, char**)
{
static_assert ( !is_transparent<std::less<int>>::value, "" );
static_assert ( !is_transparent<std::less<std::string>>::value, "" );
static_assert ( is_transparent<std::less<void>>::value, "" );
static_assert ( is_transparent<std::less<>>::value, "" );
static_assert ( !is_transparent<std::less_equal<int>>::value, "" );
static_assert ( !is_transparent<std::less_equal<std::string>>::value, "" );
static_assert ( is_transparent<std::less_equal<void>>::value, "" );
static_assert ( is_transparent<std::less_equal<>>::value, "" );
static_assert ( !is_transparent<std::equal_to<int>>::value, "" );
static_assert ( !is_transparent<std::equal_to<std::string>>::value, "" );
static_assert ( is_transparent<std::equal_to<void>>::value, "" );
static_assert ( is_transparent<std::equal_to<>>::value, "" );
static_assert ( !is_transparent<std::not_equal_to<int>>::value, "" );
static_assert ( !is_transparent<std::not_equal_to<std::string>>::value, "" );
static_assert ( is_transparent<std::not_equal_to<void>>::value, "" );
static_assert ( is_transparent<std::not_equal_to<>>::value, "" );
static_assert ( !is_transparent<std::greater<int>>::value, "" );
static_assert ( !is_transparent<std::greater<std::string>>::value, "" );
static_assert ( is_transparent<std::greater<void>>::value, "" );
static_assert ( is_transparent<std::greater<>>::value, "" );
static_assert ( !is_transparent<std::greater_equal<int>>::value, "" );
static_assert ( !is_transparent<std::greater_equal<std::string>>::value, "" );
static_assert ( is_transparent<std::greater_equal<void>>::value, "" );
static_assert ( is_transparent<std::greater_equal<>>::value, "" );
return 0;
}