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
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
// -*- C++ -*-
//===------------------------------ span ---------------------------------===//
//
// 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, c++14, c++17
// <span>
// constexpr pointer data() const noexcept;
//
#include <span>
#include <cassert>
#include <string>
#include "test_macros.h"
template <typename Span>
constexpr bool testConstexprSpan(Span sp, typename Span::pointer ptr)
{
ASSERT_NOEXCEPT(sp.data());
return sp.data() == ptr;
}
template <typename Span>
void testRuntimeSpan(Span sp, typename Span::pointer ptr)
{
ASSERT_NOEXCEPT(sp.data());
assert(sp.data() == ptr);
}
struct A{};
constexpr int iArr1[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
int iArr2[] = {10, 11, 12, 13, 14, 15, 16, 17, 18, 19};
int main ()
{
// dynamic size
static_assert(testConstexprSpan(std::span<int>(), nullptr), "");
static_assert(testConstexprSpan(std::span<long>(), nullptr), "");
static_assert(testConstexprSpan(std::span<double>(), nullptr), "");
static_assert(testConstexprSpan(std::span<A>(), nullptr), "");
static_assert(testConstexprSpan(std::span<std::string>(), nullptr), "");
static_assert(testConstexprSpan(std::span<const int>(iArr1, 1), iArr1), "");
static_assert(testConstexprSpan(std::span<const int>(iArr1, 2), iArr1), "");
static_assert(testConstexprSpan(std::span<const int>(iArr1, 3), iArr1), "");
static_assert(testConstexprSpan(std::span<const int>(iArr1, 4), iArr1), "");
static_assert(testConstexprSpan(std::span<const int>(iArr1 + 1, 1), iArr1 + 1), "");
static_assert(testConstexprSpan(std::span<const int>(iArr1 + 2, 2), iArr1 + 2), "");
static_assert(testConstexprSpan(std::span<const int>(iArr1 + 3, 3), iArr1 + 3), "");
static_assert(testConstexprSpan(std::span<const int>(iArr1 + 4, 4), iArr1 + 4), "");
// static size
static_assert(testConstexprSpan(std::span<int, 0>(), nullptr), "");
static_assert(testConstexprSpan(std::span<long, 0>(), nullptr), "");
static_assert(testConstexprSpan(std::span<double, 0>(), nullptr), "");
static_assert(testConstexprSpan(std::span<A, 0>(), nullptr), "");
static_assert(testConstexprSpan(std::span<std::string, 0>(), nullptr), "");
static_assert(testConstexprSpan(std::span<const int, 1>(iArr1, 1), iArr1), "");
static_assert(testConstexprSpan(std::span<const int, 2>(iArr1, 2), iArr1), "");
static_assert(testConstexprSpan(std::span<const int, 3>(iArr1, 3), iArr1), "");
static_assert(testConstexprSpan(std::span<const int, 4>(iArr1, 4), iArr1), "");
static_assert(testConstexprSpan(std::span<const int, 1>(iArr1 + 1, 1), iArr1 + 1), "");
static_assert(testConstexprSpan(std::span<const int, 2>(iArr1 + 2, 2), iArr1 + 2), "");
static_assert(testConstexprSpan(std::span<const int, 3>(iArr1 + 3, 3), iArr1 + 3), "");
static_assert(testConstexprSpan(std::span<const int, 4>(iArr1 + 4, 4), iArr1 + 4), "");
// dynamic size
testRuntimeSpan(std::span<int>(), nullptr);
testRuntimeSpan(std::span<long>(), nullptr);
testRuntimeSpan(std::span<double>(), nullptr);
testRuntimeSpan(std::span<A>(), nullptr);
testRuntimeSpan(std::span<std::string>(), nullptr);
testRuntimeSpan(std::span<int>(iArr2, 1), iArr2);
testRuntimeSpan(std::span<int>(iArr2, 2), iArr2);
testRuntimeSpan(std::span<int>(iArr2, 3), iArr2);
testRuntimeSpan(std::span<int>(iArr2, 4), iArr2);
testRuntimeSpan(std::span<int>(iArr2 + 1, 1), iArr2 + 1);
testRuntimeSpan(std::span<int>(iArr2 + 2, 2), iArr2 + 2);
testRuntimeSpan(std::span<int>(iArr2 + 3, 3), iArr2 + 3);
testRuntimeSpan(std::span<int>(iArr2 + 4, 4), iArr2 + 4);
// static size
testRuntimeSpan(std::span<int, 0>(), nullptr);
testRuntimeSpan(std::span<long, 0>(), nullptr);
testRuntimeSpan(std::span<double, 0>(), nullptr);
testRuntimeSpan(std::span<A, 0>(), nullptr);
testRuntimeSpan(std::span<std::string, 0>(), nullptr);
testRuntimeSpan(std::span<int, 1>(iArr2, 1), iArr2);
testRuntimeSpan(std::span<int, 2>(iArr2, 2), iArr2);
testRuntimeSpan(std::span<int, 3>(iArr2, 3), iArr2);
testRuntimeSpan(std::span<int, 4>(iArr2, 4), iArr2);
testRuntimeSpan(std::span<int, 1>(iArr2 + 1, 1), iArr2 + 1);
testRuntimeSpan(std::span<int, 2>(iArr2 + 2, 2), iArr2 + 2);
testRuntimeSpan(std::span<int, 3>(iArr2 + 3, 3), iArr2 + 3);
testRuntimeSpan(std::span<int, 4>(iArr2 + 4, 4), iArr2 + 4);
std::string s;
testRuntimeSpan(std::span<std::string>(&s, 1), &s);
testRuntimeSpan(std::span<std::string, 1>(&s, 1), &s);
}
|
