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[string] Minor simplifications

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This commit is contained in:
Michael Ilseman
2018-02-02 12:04:15 -08:00
parent 444796a66b
commit a6e79efbbe
3 changed files with 41 additions and 46 deletions
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31
stdlib/public/core/StringLegacy.swift
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@@ -48,23 +48,22 @@ extension String {
/// string.
@_inlineable // FIXME(sil-serialize-all)
public init(repeating repeatedValue: String, count: Int) {
if count == 0 {
self = ""
} else if count == 1 {
self = repeatedValue
guard count > 1 else {
self = count == 0 ? "" : repeatedValue
return
}
precondition(count > 0, "Negative count not allowed")
defer { _fixLifetime(repeatedValue) }
if _slowPath(repeatedValue._guts._isOpaque) {
let opaque = repeatedValue._guts._asOpaque()
self.init(_StringGuts(opaque._repeated(count)))
} else if repeatedValue._guts.isASCII {
let ascii = repeatedValue._guts._unmanagedASCIIView
self.init(_StringGuts(ascii._repeated(count)))
} else {
precondition(count > 0, "Negative count not allowed")
defer { _fixLifetime(repeatedValue) }
if _slowPath(repeatedValue._guts._isOpaque) {
let opaque = repeatedValue._guts._asOpaque()
self.init(_StringGuts(opaque._repeated(count)))
} else if repeatedValue._guts.isASCII {
let ascii = repeatedValue._guts._unmanagedASCIIView
self.init(_StringGuts(ascii._repeated(count)))
} else {
let utf16 = repeatedValue._guts._unmanagedUTF16View
self.init(_StringGuts(utf16._repeated(count)))
}
let utf16 = repeatedValue._guts._unmanagedUTF16View
self.init(_StringGuts(utf16._repeated(count)))
}
}