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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2023 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
public protocol EncodingConfigurationProviding {
associatedtype EncodingConfiguration
static var encodingConfiguration: EncodingConfiguration { get }
}
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
public protocol EncodableWithConfiguration {
associatedtype EncodingConfiguration
func encode(to encoder: Encoder, configuration: EncodingConfiguration) throws
}
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
public protocol DecodingConfigurationProviding {
associatedtype DecodingConfiguration
static var decodingConfiguration: DecodingConfiguration { get }
}
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
public protocol DecodableWithConfiguration {
associatedtype DecodingConfiguration
init(from decoder: Decoder, configuration: DecodingConfiguration) throws
}
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
public typealias CodableWithConfiguration = EncodableWithConfiguration & DecodableWithConfiguration
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
public extension KeyedEncodingContainer {
mutating func encode<T, C>(_ wrapper: CodableConfiguration<T?, C>, forKey key: Self.Key) throws {
switch wrapper.wrappedValue {
case .some(let val):
try val.encode(to: self.superEncoder(forKey: key), configuration: C.encodingConfiguration)
break
default: break
}
}
}
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
public extension KeyedDecodingContainer {
func decode<T, C>(_: CodableConfiguration<T?, C>.Type, forKey key: Self.Key) throws -> CodableConfiguration<T?, C> {
if self.contains(key) {
let wrapper = try self.decode(CodableConfiguration<T, C>.self, forKey: key)
return CodableConfiguration<T?, C>(wrappedValue: wrapper.wrappedValue)
} else {
return CodableConfiguration<T?, C>(wrappedValue: nil)
}
}
}
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
public extension KeyedEncodingContainer {
mutating func encode<T: EncodableWithConfiguration, C: EncodingConfigurationProviding>(_ t: T, forKey key: Self.Key, configuration: C.Type) throws where T.EncodingConfiguration == C.EncodingConfiguration {
try t.encode(to: self.superEncoder(forKey: key), configuration: C.encodingConfiguration)
}
mutating func encodeIfPresent<T: EncodableWithConfiguration, C: EncodingConfigurationProviding>(_ t: T?, forKey key: Self.Key, configuration: C.Type) throws where T.EncodingConfiguration == C.EncodingConfiguration {
guard let value = t else { return }
try self.encode(value, forKey: key, configuration: configuration)
}
mutating func encode<T: EncodableWithConfiguration>(_ t: T, forKey key: Self.Key, configuration: T.EncodingConfiguration) throws {
try t.encode(to: self.superEncoder(forKey: key), configuration: configuration)
}
mutating func encodeIfPresent<T: EncodableWithConfiguration>(_ t: T?, forKey key: Self.Key, configuration: T.EncodingConfiguration) throws {
guard let value = t else { return }
try self.encode(value, forKey: key, configuration: configuration)
}
}
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
public extension KeyedDecodingContainer {
func decode<T: DecodableWithConfiguration, C: DecodingConfigurationProviding>(
_ : T.Type,
forKey key: Self.Key,
configuration: C.Type
) throws -> T where T.DecodingConfiguration == C.DecodingConfiguration {
return try T(from: self.superDecoder(forKey: key), configuration: C.decodingConfiguration)
}
func decodeIfPresent<T: DecodableWithConfiguration, C: DecodingConfigurationProviding>(
_ : T.Type,
forKey key: Self.Key,
configuration: C.Type
) throws -> T? where T.DecodingConfiguration == C.DecodingConfiguration {
if contains(key) {
return try self.decode(T.self, forKey: key, configuration: configuration)
} else {
return nil
}
}
func decode<T: DecodableWithConfiguration>(
_ : T.Type,
forKey key: Self.Key,
configuration: T.DecodingConfiguration
) throws -> T {
return try T(from: self.superDecoder(forKey: key), configuration: configuration)
}
func decodeIfPresent<T: DecodableWithConfiguration>(
_ : T.Type,
forKey key: Self.Key,
configuration: T.DecodingConfiguration
) throws -> T? {
if contains(key) {
return try self.decode(T.self, forKey: key, configuration: configuration)
} else {
return nil
}
}
}
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
public extension UnkeyedEncodingContainer {
mutating func encode<T: EncodableWithConfiguration, C: EncodingConfigurationProviding>(_ t: T, configuration: C.Type) throws where T.EncodingConfiguration == C.EncodingConfiguration {
try t.encode(to: self.superEncoder(), configuration: C.encodingConfiguration)
}
mutating func encode<T: EncodableWithConfiguration>(_ t: T, configuration: T.EncodingConfiguration) throws {
try t.encode(to: self.superEncoder(), configuration: configuration)
}
}
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
public extension UnkeyedDecodingContainer {
mutating func decode<T: DecodableWithConfiguration, C: DecodingConfigurationProviding>(
_ : T.Type, configuration: C.Type
) throws -> T where T.DecodingConfiguration == C.DecodingConfiguration {
return try T(from: try self.superDecoder(), configuration: C.decodingConfiguration)
}
mutating func decodeIfPresent<T: DecodableWithConfiguration, C: DecodingConfigurationProviding>(
_ : T.Type, configuration: C.Type
) throws -> T? where T.DecodingConfiguration == C.DecodingConfiguration {
if try self.decodeNil() {
return nil
} else {
return try self.decode(T.self, configuration: configuration)
}
}
mutating func decode<T: DecodableWithConfiguration>(
_ : T.Type, configuration: T.DecodingConfiguration
) throws -> T {
return try T(from: try self.superDecoder(), configuration: configuration)
}
mutating func decodeIfPresent<T: DecodableWithConfiguration>(
_ : T.Type, configuration: T.DecodingConfiguration
) throws -> T? {
if try self.decodeNil() {
return nil
} else {
return try self.decode(T.self, configuration: configuration)
}
}
}
@propertyWrapper
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
public struct CodableConfiguration<T, ConfigurationProvider> : Codable
where T: CodableWithConfiguration,
ConfigurationProvider: EncodingConfigurationProviding & DecodingConfigurationProviding,
ConfigurationProvider.EncodingConfiguration == T.EncodingConfiguration,
ConfigurationProvider.DecodingConfiguration == T.DecodingConfiguration
{
public var wrappedValue: T
public init(wrappedValue: T) {
self.wrappedValue = wrappedValue
}
public init(wrappedValue: T, from configurationProvider: ConfigurationProvider.Type) {
self.wrappedValue = wrappedValue
}
public func encode(to encoder: Encoder) throws {
try wrappedValue.encode(to: encoder, configuration: ConfigurationProvider.encodingConfiguration)
}
public init(from decoder: Decoder) throws {
wrappedValue = try T(from: decoder, configuration: ConfigurationProvider.decodingConfiguration)
}
}
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
extension CodableConfiguration : Sendable where T : Sendable { }
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
extension CodableConfiguration : Equatable where T : Equatable { }
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
extension CodableConfiguration : Hashable where T : Hashable { }
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
extension Optional : EncodableWithConfiguration where Wrapped : EncodableWithConfiguration {
public func encode(to encoder: Encoder, configuration: Wrapped.EncodingConfiguration) throws {
if let wrapped = self {
try wrapped.encode(to: encoder, configuration: configuration)
} else {
var c = encoder.singleValueContainer()
try c.encodeNil()
}
}
}
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
extension Optional : DecodableWithConfiguration where Wrapped : DecodableWithConfiguration {
public init(from decoder: Decoder, configuration: Wrapped.DecodingConfiguration) throws {
let c = try decoder.singleValueContainer()
if c.decodeNil() {
self = nil
} else {
self = try Wrapped.init(from: decoder, configuration: configuration)
}
}
}
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
extension Array : EncodableWithConfiguration where Element : EncodableWithConfiguration {
public func encode(to encoder: Encoder, configuration: Element.EncodingConfiguration) throws {
var c = encoder.unkeyedContainer()
for e in self {
try c.encode(e, configuration: configuration)
}
}
}
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
extension Array : DecodableWithConfiguration where Element : DecodableWithConfiguration {
public init(from decoder: Decoder, configuration: Element.DecodingConfiguration) throws {
var result = [Element]()
var c = try decoder.unkeyedContainer()
while !c.isAtEnd {
try result.append(c.decode(Element.self, configuration: configuration))
}
self = result
}
}
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