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49 lines
1.4 KiB
Swift
49 lines
1.4 KiB
Swift
//
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// MoveTree+Deprecated.swift
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// ChessKit
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//
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extension MoveTree {
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/// Returns the move at the specified index.
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///
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/// - parameter index: The move index to query.
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/// - returns: The move at the given index, or `nil` if no
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/// move exists at that index.
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///
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/// This value can also be accessed using a subscript on
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/// the ``MoveTree`` directly,
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/// e.g. `tree[.init(number: 2, color: .white)]`
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@available(*, deprecated, renamed: "subscript(_:)")
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public func move(at index: Index) -> Move? {
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dictionary[index]?.move
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}
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/// Returns the index of the previous move given an `index`.
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@available(
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*, deprecated,
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renamed: "index(before:)",
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message: "Use index(before:) to obtain the previous index or hasIndex(before:) to check if a valid previous index exists."
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)
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public func previousIndex(for index: Index) -> Index? {
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if index == minimumIndex.next {
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minimumIndex
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} else {
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dictionary[index]?.previous?.index
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}
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}
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/// Returns the index of the next move given an `index`.
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@available(
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*, deprecated,
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renamed: "index(after:)",
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message: "Use index(after:) to obtain the next index or hasIndex(after:) to check if a valid next index exists."
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)
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public func nextIndex(for index: Index) -> Index? {
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if index == minimumIndex {
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dictionary[minimumIndex.next]?.index
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} else {
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dictionary[index]?.next?.index
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}
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}
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}
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