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4ddac3fbbd
* Eradicate IndexDistance associated type, replacing with Int everywhere * Consistently use Int for ExistentialCollection’s IndexDistance type. * Fix test for IndexDistance removal * Remove a handful of no-longer-needed explicit types * Add compatibility shims for non-Int index distances * Test compatibility shim * Move IndexDistance typealias into the Collection protocol
23 lines
785 B
Swift
23 lines
785 B
Swift
// RUN: %target-typecheck-verify-swift
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struct Int64Distance<Element>: Collection {
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let _storage: [Element]
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typealias Index = Int64
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typealias IndexDistance = Int64
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var startIndex: Index { return Int64(_storage.startIndex) }
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var endIndex: Index { return Int64(_storage.startIndex) }
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func index(after i: Index) -> Index { return i + 1 }
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subscript(i: Index) -> Element { return _storage[Int(i)] }
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}
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let c = Int64Distance(_storage: [1,2,3])
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let i64: Int64 = 2
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_ = c.index(c.startIndex, offsetBy: i64) // expected-warning {{'index(_:offsetBy:)' is deprecated: all index distances are now of type Int}}
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let _: Int64 = c.distance(from: c.startIndex, to: c.endIndex) // expected-warning {{distance(from:to:)' is deprecated: all index distances are now of type Int}}
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