32 lines
794 B
Swift
Executable File
32 lines
794 B
Swift
Executable File
//
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// UnicodeIterator.swift
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// CSV
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//
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// Created by Yasuhiro Hatta on 2016/06/20.
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// Copyright © 2016 yaslab. All rights reserved.
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//
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internal struct UnicodeIterator<
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Input: IteratorProtocol,
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InputEncoding: UnicodeCodec>
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: IteratorProtocol
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where InputEncoding.CodeUnit == Input.Element {
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private var input: Input
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private var inputEncoding: InputEncoding
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internal init(input: Input, inputEncodingType: InputEncoding.Type) {
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self.input = input
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self.inputEncoding = inputEncodingType.init()
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}
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internal mutating func next() -> UnicodeScalar? {
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switch inputEncoding.decode(&input) {
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case .scalarValue(let c): return c
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case .emptyInput: return nil
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case .error: return nil
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}
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}
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}
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