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WeakArray improvements

This commit is contained in:
Shadowfacts 2020-09-20 11:27:14 -04:00
parent 0d972d987c
commit b80a61cc95
Signed by untrusted user: shadowfacts
GPG Key ID: 94A5AB95422746E5
1 changed files with 16 additions and 3 deletions
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19
Tusker/WeakArray.swift
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@ -16,12 +16,16 @@ fileprivate class WeakWrapper<T: AnyObject> {
} }
} }
struct WeakArray<Element: AnyObject>: Collection { struct WeakArray<Element: AnyObject>: MutableCollection, RangeReplaceableCollection {
private var array: [WeakWrapper<Element>] private var array: [WeakWrapper<Element>]
var startIndex: Int { array.startIndex } var startIndex: Int { array.startIndex }
var endIndex: Int { array.endIndex } var endIndex: Int { array.endIndex }
init() {
array = []
}
init(_ elements: [Element]) { init(_ elements: [Element]) {
array = elements.map { WeakWrapper($0) } array = elements.map { WeakWrapper($0) }
} }
@ -30,11 +34,20 @@ struct WeakArray<Element: AnyObject>: Collection {
array = elements.map { WeakWrapper($0) } array = elements.map { WeakWrapper($0) }
} }
subscript(_ index: Int) -> Element? { subscript(position: Int) -> Element? {
return array[index].value get {
array[position].value
}
set(newValue) {
array[position] = WeakWrapper(newValue)
}
} }
func index(after i: Int) -> Int { func index(after i: Int) -> Int {
return array.index(after: i) return array.index(after: i)
} }
mutating func replaceSubrange<C>(_ subrange: Range<Int>, with newElements: C) where C : Collection, Self.Element == C.Element {
array.replaceSubrange(subrange, with: newElements.map { WeakWrapper($0) })
}
} }