forceUnwrap.swift

func privateHelperFunctionThatMayOrMayNotBeSemanticallyEquivalentToTheForceUnwrapOperator<T>(_ arg: T?) -> T {
    let oof = { fatalError("OH MY GOD it was null all along") }
    
    if MemoryLayout<T?>.size == MemoryLayout<T>.size { // zero abstraction optional?
        if withUnsafeBytes(of: arg, { $0.allSatisfy { $0 == 0 } }) {
            oof()
        }
        return unsafeBitCast(arg, to: T.self)
    }
    
    assert(MemoryLayout<T?>.size == 1 + MemoryLayout<T>.size, "not sure what's going on here")
    
    if withUnsafeBytes(of: arg, { $0.load(fromByteOffset: MemoryLayout<T>.size, as: UInt8.self) != 0 }) {
        oof()
    }
    return withUnsafeBytes(of: arg) { $0.load(as: T.self) }
}