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stdlib: remove Sliceable conformance from String

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Swift SVN r28442
This commit is contained in:
Dmitri Hrybenko
2015-05-11 20:58:31 +00:00
parent e590a9b63d
commit 61214ec55b
19 changed files with 114 additions and 67 deletions
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20
stdlib/public/core/StringCharacterView.swift
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@@ -56,6 +56,12 @@ extension String {
swap(&_core, &tmp._core)
return r
}
/// Construct the `String` corresponding to the given sequence of
/// Unicode scalars.
public init(_ characters: CharacterView) {
self.init(characters._core)
}
}
/// `String.CharacterView` is a collection of `Character`
@@ -383,3 +389,17 @@ extension String.CharacterView : RangeReplaceableCollectionType {
Swift.removeAll(&self, keepCapacity: keepCapacity)
}
}
extension String.CharacterView : Sliceable {
/// Access the characters in the given `subRange`
///
/// - complexity: O(1) unless bridging from Objective-C requires an
/// O(N) conversion.
public subscript(subRange: Range<Index>) -> String.CharacterView {
let unicodeScalarRange =
subRange.startIndex._base..<subRange.endIndex._base
return String.CharacterView(
String(_core).unicodeScalars[unicodeScalarRange]._core)
}
}