JSONPrimitive.swift

/**
 JSONPrimitive represents any Swift type which can be interchanged with a primitive
 JSON type. Use this protocol instead of `Any` when dealing with JSON data.
 */
public protocol JSONPrimitive {}

/**
 Int is excluded here because JSON only has one "type" for numbers,
 so we always use Double to avoid lossy conversion.
 */
extension String: JSONPrimitive {}
extension Double: JSONPrimitive {}
extension Bool: JSONPrimitive {}
extension Dictionary: JSONPrimitive where Key == String, Value: JSONPrimitive {}
extension Array: JSONPrimitive where Element: JSONPrimitive {}
extension Optional: JSONPrimitive where Wrapped: JSONPrimitive {}

// A JSONValue itself can act as a JSONPrimitive!
extension JSONValue: JSONPrimitive { }