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// RUN: %target-run-stdlib-swift
// REQUIRES: executable_test
import StdlibUnittest
var suite = TestSuite("DefaultIndices")
defer { runAllTests() }
extension Collection {
func genericDistance(from start: Index, to end: Index) -> Int {
return distance(from: start, to: end)
}
func genericIndex(_ i: Index, offsetBy distance: Int) -> Index {
return index(i, offsetBy: distance)
}
func genericIndex(
_ i: Index, offsetBy distance: Int, limitedBy limit: Index
) -> Index? {
return index(i, offsetBy: distance, limitedBy: limit)
}
}
suite.test("Bidirectional dispatch") {
guard #available(macOS 11.3, iOS 14.5, tvOS 14.5, watchOS 7.4, *) else {
// This used to cause a runtime trap until https://github.com/apple/swift/pull/32019
return
}
var r = (0...10).indices
expectType(DefaultIndices<ClosedRange<Int>>.self, &r)
let d = r.distance(from: r.endIndex, to: r.startIndex)
let d2 = r.genericDistance(from: r.endIndex, to: r.startIndex)
expectEqual(d, d2)
let i = r.index(r.endIndex, offsetBy: -1)
let i2 = r.genericIndex(r.endIndex, offsetBy: -1)
expectEqual(i, i2)
let j = r.index(r.startIndex, offsetBy: -1, limitedBy: r.startIndex)
let j2 = r.genericIndex(r.startIndex, offsetBy: -1, limitedBy: r.startIndex)
expectEqual(j, j2)
}
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