99 lines
3 KiB
Swift
99 lines
3 KiB
Swift
//
|
|
// XMLAttribute.swift
|
|
// XMLCoder
|
|
//
|
|
// Created by Benjamin Wetherfield on 6/3/20.
|
|
//
|
|
|
|
protocol XMLAttributeProtocol {}
|
|
|
|
/** Property wrapper specifying that a given property should be encoded and decoded as an XML attribute.
|
|
|
|
For example, this type
|
|
```swift
|
|
struct Book: Codable {
|
|
@Attribute var id: Int
|
|
}
|
|
```
|
|
|
|
will encode value `Book(id: 42)` as `<Book id="42"></Book>`. And vice versa,
|
|
it will decode the former into the latter.
|
|
*/
|
|
@propertyWrapper
|
|
public struct Attribute<Value>: XMLAttributeProtocol {
|
|
public var wrappedValue: Value
|
|
|
|
public init(_ wrappedValue: Value) {
|
|
self.wrappedValue = wrappedValue
|
|
}
|
|
}
|
|
|
|
extension Attribute: Codable where Value: Codable {
|
|
public func encode(to encoder: Encoder) throws {
|
|
try wrappedValue.encode(to: encoder)
|
|
}
|
|
|
|
public init(from decoder: Decoder) throws {
|
|
try wrappedValue = .init(from: decoder)
|
|
}
|
|
}
|
|
|
|
extension Attribute: Equatable where Value: Equatable {}
|
|
extension Attribute: Hashable where Value: Hashable {}
|
|
extension Attribute: Sendable where Value: Sendable {}
|
|
|
|
extension Attribute: ExpressibleByIntegerLiteral where Value: ExpressibleByIntegerLiteral {
|
|
public typealias IntegerLiteralType = Value.IntegerLiteralType
|
|
|
|
public init(integerLiteral value: Value.IntegerLiteralType) {
|
|
wrappedValue = Value(integerLiteral: value)
|
|
}
|
|
}
|
|
|
|
extension Attribute: ExpressibleByUnicodeScalarLiteral where Value: ExpressibleByUnicodeScalarLiteral {
|
|
public init(unicodeScalarLiteral value: Value.UnicodeScalarLiteralType) {
|
|
wrappedValue = Value(unicodeScalarLiteral: value)
|
|
}
|
|
|
|
public typealias UnicodeScalarLiteralType = Value.UnicodeScalarLiteralType
|
|
}
|
|
|
|
extension Attribute: ExpressibleByExtendedGraphemeClusterLiteral where Value: ExpressibleByExtendedGraphemeClusterLiteral {
|
|
public typealias ExtendedGraphemeClusterLiteralType = Value.ExtendedGraphemeClusterLiteralType
|
|
|
|
public init(extendedGraphemeClusterLiteral value: Value.ExtendedGraphemeClusterLiteralType) {
|
|
wrappedValue = Value(extendedGraphemeClusterLiteral: value)
|
|
}
|
|
}
|
|
|
|
extension Attribute: ExpressibleByStringLiteral where Value: ExpressibleByStringLiteral {
|
|
public typealias StringLiteralType = Value.StringLiteralType
|
|
|
|
public init(stringLiteral value: Value.StringLiteralType) {
|
|
wrappedValue = Value(stringLiteral: value)
|
|
}
|
|
}
|
|
|
|
extension Attribute: ExpressibleByBooleanLiteral where Value: ExpressibleByBooleanLiteral {
|
|
public typealias BooleanLiteralType = Value.BooleanLiteralType
|
|
|
|
public init(booleanLiteral value: Value.BooleanLiteralType) {
|
|
wrappedValue = Value(booleanLiteral: value)
|
|
}
|
|
}
|
|
|
|
extension Attribute: ExpressibleByNilLiteral where Value: ExpressibleByNilLiteral {
|
|
public init(nilLiteral: ()) {
|
|
wrappedValue = Value(nilLiteral: ())
|
|
}
|
|
}
|
|
|
|
protocol XMLOptionalAttributeProtocol: XMLAttributeProtocol {
|
|
init()
|
|
}
|
|
|
|
extension Attribute: XMLOptionalAttributeProtocol where Value: AnyOptional {
|
|
init() {
|
|
wrappedValue = Value()
|
|
}
|
|
}
|