32 lines
816 B
Swift
32 lines
816 B
Swift
//
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// ComponentIdentifier.swift
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//
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//
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// Created by Christian Treffs on 20.08.19.
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//
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/// Identifies a component by it's meta type
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public struct ComponentIdentifier {
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@usableFromInline
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typealias Hash = Int
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@usableFromInline
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typealias StableId = UInt64
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@usableFromInline let hash: Hash
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}
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extension ComponentIdentifier {
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@usableFromInline
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init<C>(_ componentType: C.Type) where C: Component {
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self.hash = Self.makeRuntimeHash(componentType)
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}
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/// object identifier hash (only stable during runtime) - arbitrary hash is ok.
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internal static func makeRuntimeHash<C>(_ componentType: C.Type) -> Hash where C: Component {
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ObjectIdentifier(componentType).hashValue
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}
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}
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extension ComponentIdentifier: Equatable { }
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extension ComponentIdentifier: Hashable { }
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