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Symmetry with what we did for Arrays says that Strings shoudl only concatenate to Strings using "+". We have append() for adding single characters. Swift SVN r20997
48 lines
1.4 KiB
Swift
48 lines
1.4 KiB
Swift
//===--- Reverse.swift - Tests for lazy and eager reverse() ---------------===//
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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 - 2015 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 http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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// RUN: %target-run-simple-swift | FileCheck %s
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// CHECK: testing...
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println("testing...")
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// Reverse a random access CollectionType
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let r = lazy(2..<8).map { $0 * 3 }.reverse()
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// CHECK-NEXT: [21, 18, 15, 12, 9, 6]
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println(r.array)
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func assertRandomAccess<T: RandomAccessIndexType>(x: T) {}
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assertRandomAccess(r.startIndex)
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// The global reverse() function produces an Array.
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let eager: Array = reverse(lazy(2..<8).map { $0 * 3 })
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// Make sure it has the right contents
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// CHECK-NEXT: true
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println(equal(eager, r))
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let raboof = reduce(lazy("foobar").reverse(), "") {
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(s: String, c: Character) in s + String(c)
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}
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// CHECK-NEXT: "raboof"
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debugPrintln(raboof)
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// Prove that the result is at least bidirectional, i.e. reversible
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let foobar = reduce(lazy("foobar").reverse().reverse(), "") {
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(s: String, c: Character) in s + String(c)
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}
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// CHECK-NEXT: "foobar"
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debugPrintln(foobar)
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// CHECK-NEXT: all done.
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println("all done.")
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