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AddressLenses.swift
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AddressLenses.swift
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import Foundation
extension Address {
struct Lenses {
static let postalCode: Lens<Address, Int> = Lens(
get: { $0.postalCode },
set: { (address, postalCode) in
var builder = AddressBuilder(existingAddress: address)
return builder.withPostalCode(postalCode).build()
}
)
static let streetAddress: Lens<Address, String> = Lens(
get: { $0.streetAddress },
set: { (address, streetAddress) in
var builder = AddressBuilder(existingAddress: address)
return builder.withStreetAddress(streetAddress).build()
}
)
static let number: Lens<Address, Int> = Lens(
get: { $0.number },
set: { (address, number) in
var builder = AddressBuilder(existingAddress: address)
return builder.withNumber(number).build()
}
)
}
}
struct BoundLensToAddress<Whole>: BoundLensType {
typealias Part = Address
let storage: BoundLensStorage<Whole, Part>
var postalCode: BoundLens<Whole, Int> {
return BoundLens<Whole, Int>(parent: self, sublens: Address.Lenses.postalCode)
}
var streetAddress: BoundLens<Whole, String> {
return BoundLens<Whole, String>(parent: self, sublens: Address.Lenses.streetAddress)
}
var number: BoundLens<Whole, Int> {
return BoundLens<Whole, Int>(parent: self, sublens: Address.Lenses.number)
}
}
extension Address {
var lens: BoundLensToAddress<Address> {
return BoundLensToAddress<Address>(instance: self, lens: createIdentityLens())
}
}