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55 lines
2.1 KiB
Swift
55 lines
2.1 KiB
Swift
//===----------------------------------------------------------------------===//
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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 - 2019 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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public enum EditorPlaceholder: Hashable {
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case basic(String)
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case typed(displayName: String, type: String, typeForExpansion: String)
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static let placeholderPrefix: String = "<#"
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static let placeholderSuffix: String = "#>"
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public init?(_ skPlaceholder: String) {
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guard skPlaceholder.hasPrefix(EditorPlaceholder.placeholderPrefix) &&
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skPlaceholder.hasSuffix(EditorPlaceholder.placeholderSuffix) else {
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return nil
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}
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var skPlaceholder = skPlaceholder.dropFirst(2).dropLast(2)
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guard skPlaceholder.hasPrefix("T##") else {
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self = .basic(String(skPlaceholder))
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return
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}
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skPlaceholder = skPlaceholder.dropFirst(3)
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guard let end = skPlaceholder.range(of: "##") else {
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let type = String(skPlaceholder)
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self = .typed(displayName: type, type: type, typeForExpansion: type)
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return
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}
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let displayName = String(skPlaceholder[skPlaceholder.startIndex..<end.lowerBound])
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skPlaceholder = skPlaceholder[end.upperBound...]
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if let end = skPlaceholder.range(of: "##") {
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let type = String(skPlaceholder[skPlaceholder.startIndex..<end.lowerBound])
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let typeForExpansion = String(skPlaceholder[end.upperBound...])
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self = .typed(displayName: displayName, type: type, typeForExpansion: typeForExpansion)
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} else {
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let type = String(skPlaceholder)
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self = .typed(displayName: displayName, type: type, typeForExpansion: type)
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}
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}
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public var displayName: String {
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switch self {
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case .basic(let displayName), .typed(let displayName, _, _):
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return displayName
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}
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}
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}
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