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33 lines
1011 B
Plaintext
33 lines
1011 B
Plaintext
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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%{
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from gyb_stdlib_unittest_support import TRACE, stackTrace, trace
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}%
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public func checkStrideable<S : Strideable>(
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instances: [S],
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distances: [S.Stride],
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distanceOracle: (Int, Int) -> S.Stride,
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${TRACE}
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) {
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for i in instances.indices {
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let first = instances[i]
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for j in instances.indices {
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let second = instances[j]
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expectEqual(distanceOracle(i, j), first.distance(to: second))
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expectEqual(second, first.advanced(by: distanceOracle(i, j)))
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}
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}
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}
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