stringbytes.swift

let data = string.data(using: String.Encoding.utf8, allowLossyConversion: false)!
return try data.withUnsafeBytes { (ptr: UnsafePointer<UInt8>) -> JSValue in
    let buffer = UnsafeBufferPointer(start: ptr, count: data.count)
    let generator = ReplayableGenerator(buffer)

    let value = try parse(generator)
    try validateRemainingContent(generator)
    return value
}