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
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
//===--- ArraySpanProperties.swift ----------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2025 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
// RUN: %target-run-stdlib-swift
// REQUIRES: executable_test
import StdlibUnittest
var suite = TestSuite("Array-Backed Span Properties")
defer { runAllTests() }
suite.test("Array.span property")
.skip(.custom(
{ if #available(SwiftStdlib 6.2, *) { false } else { true } },
reason: "Requires Swift 6.2's standard library"
))
.code {
guard #available(SwiftStdlib 6.2, *) else { return }
let capacity = 4
let a = Array(0..<capacity)
let span = a.span
expectEqual(span.count, capacity)
expectEqual(span[0], a[0])
}
suite.test("Array.mutableSpan property")
.require(.stdlib_6_2).code {
guard #available(SwiftStdlib 6.2, *) else { return }
let capacity = 4
var a = Array(0..<capacity)
var span = a.mutableSpan
expectEqual(span.count, capacity)
expectEqual(span[0], 0)
span[0] = 100
_ = consume span
expectEqual(a[0], 100)
}
suite.test("ContiguousArray.span property")
.skip(.custom(
{ if #available(SwiftStdlib 6.2, *) { false } else { true } },
reason: "Requires Swift 6.2's standard library"
))
.code {
guard #available(SwiftStdlib 6.2, *) else { return }
let capacity = 4
let a = ContiguousArray(0..<capacity)
let span = a.span
expectEqual(span.count, capacity)
expectEqual(span[0], a[0])
}
suite.test("ContiguousArray.mutableSpan property")
.require(.stdlib_6_2).code {
guard #available(SwiftStdlib 6.2, *) else { return }
let capacity = 4
var a = ContiguousArray(0..<capacity)
var span = a.mutableSpan
expectEqual(span.count, capacity)
expectEqual(span[0], 0)
span[0] = 100
_ = consume span
expectEqual(a[0], 100)
}
suite.test("ArraySlice.span property")
.skip(.custom(
{ if #available(SwiftStdlib 6.2, *) { false } else { true } },
reason: "Requires Swift 6.2's standard library"
))
.code {
guard #available(SwiftStdlib 6.2, *) else { return }
let capacity = 4
let a = Array(0..<capacity)
let span1 = a.span
expectEqual(span1.count, capacity)
expectEqual(span1[0], a[0])
let s = a[...]
let span2 = s.span
expectEqual(span2.count, capacity)
expectEqual(span2[0], a[0])
let i1 = span1.withUnsafeBufferPointer { Int(bitPattern: $0.baseAddress) }
let i2 = span1.withUnsafeBufferPointer { Int(bitPattern: $0.baseAddress) }
expectEqual(i1, i2)
}
suite.test("KeyValuePairs.span property")
.skip(.custom(
{ if #available(SwiftStdlib 6.2, *) { false } else { true } },
reason: "Requires Swift 6.2's standard library"
))
.code {
guard #available(SwiftStdlib 6.2, *) else { return }
let pairs = [(1, "a"), (2, "b"), (3, "c"), (4, "d")]
let kvp: KeyValuePairs = [1: "a", 2: "b", 3: "c", 4: "d"]
let span = kvp.span
expectEqual(span.count, kvp.count)
for i in span.indices {
expectEqual(span[i], pairs[i])
}
}
suite.test("ArraySlice.mutableSpan property")
.require(.stdlib_6_2).code {
guard #available(SwiftStdlib 6.2, *) else { return }
let capacity = 4
let a = Array(0..<capacity)
var s = a[...]
var span = s.mutableSpan
expectEqual(span.count, capacity)
expectEqual(span[0], a[0])
span[0] += 100
expectEqual(span[0], a[0]+100)
_ = consume span
expectEqual(s[0], a[0]+100)
}
|
