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HashedCollectionsAnyHashableExtensions.swift.gyb
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HashedCollectionsAnyHashableExtensions.swift.gyb
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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
// FIXME(ABI)(compiler limitation): This protocol exists to identify
// `AnyHashable` in conditional extensions. Replace this protocol
// with conditional extensions on `Set` and `Dictionary` "where Key ==
// AnyHashable".
public protocol _AnyHashableProtocol {
var base: Any { get }
}
extension AnyHashable : _AnyHashableProtocol {}
//===----------------------------------------------------------------------===//
// Convenience APIs for Set<AnyHashable>
//===----------------------------------------------------------------------===//
// FIXME: remove these trampolines when extensions below can be
// properly expressed in the language.
extension Set {
@inline(__always)
internal mutating func _concreteElement_insert(
_ newMember: Element
) -> (inserted: Bool, memberAfterInsert: Element) {
return insert(newMember)
}
@inline(__always)
internal mutating func _concreteElement_update(
with newMember: Element
) -> Element? {
return update(with: newMember)
}
@inline(__always)
internal mutating func _concreteElement_remove(
_ member: Element
) -> Element? {
return remove(member)
}
}
// FIXME(ABI)(compiler limitation): replace with `where Element == AnyHashable`.
extension Set where Element : _AnyHashableProtocol {
public mutating func insert<ConcreteElement : Hashable>(
_ newMember: ConcreteElement
) -> (inserted: Bool, memberAfterInsert: ConcreteElement) {
let (inserted, memberAfterInsert) =
_concreteElement_insert(AnyHashable(newMember) as! Element)
return (
inserted: inserted,
memberAfterInsert: memberAfterInsert.base as! ConcreteElement)
}
@discardableResult
public mutating func update<ConcreteElement : Hashable>(
with newMember: ConcreteElement
) -> ConcreteElement? {
return _concreteElement_update(with: AnyHashable(newMember) as! Element)
.map { $0.base as! ConcreteElement }
}
@discardableResult
public mutating func remove<ConcreteElement : Hashable>(
_ member: ConcreteElement
) -> ConcreteElement? {
return _concreteElement_remove(AnyHashable(member) as! Element)
.map { $0.base as! ConcreteElement }
}
}
//===----------------------------------------------------------------------===//
// Convenience APIs for Dictionary<AnyHashable, *>
//===----------------------------------------------------------------------===//
// FIXME: remove these trampolines when extensions below can be
// properly expressed in the language.
extension Dictionary {
internal subscript(_concreteKey key: Key) -> Value? {
@inline(__always)
get {
return self[key]
}
@inline(__always)
set(newValue) {
self[key] = newValue
}
}
@inline(__always)
internal mutating func _concreteKey_updateValue(
_ value: Value, forKey key: Key
) -> Value? {
return updateValue(value, forKey: key)
}
@inline(__always)
internal mutating func _concreteKey_removeValue(forKey key: Key) -> Value? {
return removeValue(forKey: key)
}
}
// FIXME(ABI)(compiler limitation): replace with `where Element == AnyHashable`.
extension Dictionary where Key : _AnyHashableProtocol {
public subscript(_ key: _Hashable) -> Value? {
// FIXME(ABI)(compiler limitation): replace this API with a
// generic subscript.
get {
return self[_concreteKey: key._toAnyHashable() as! Key]
}
set {
self[_concreteKey: key._toAnyHashable() as! Key] = newValue
}
}
@discardableResult
public mutating func updateValue<ConcreteKey : Hashable>(
_ value: Value, forKey key: ConcreteKey
) -> Value? {
return _concreteKey_updateValue(value, forKey: AnyHashable(key) as! Key)
}
@discardableResult
public mutating func removeValue<ConcreteKey : Hashable>(
forKey key: ConcreteKey
) -> Value? {
return _concreteKey_removeValue(forKey: AnyHashable(key) as! Key)
}
}