Hi Kenny,
> On Mar 19, 2017, at 9:53 PM, Kenny Leung via swift-evolution
> <[email protected]> wrote:
>
> Hi All.
>
> Forgive me if I missed it - I haven’t read the proposal in full detail - but
> it seems to make no mention of archiving graphs with circular references. Is
> this implicitly supported, or explicitly unsupported?
>
We expect this to be left up to the encoders and decoders. In Foundation
itself, we actually have subclasses of NSCoder that support this and subclasses
that do not.
> While we’re at it, my only real exposure to archiving is through Foundation,
> so I’d like to know how everybody else understands these terms:
>
> serialization - the process of “flattening” out an object graph into a serial
> stream of objects
>
> encoding - the process of converting internal object data into an external
> format
>
> archiving - the whole enchilada of serialization + encoding
>
> Thanks!
>
> -Kenny
Good question about terminology. Here is how we’ve tried to define these:
Serialization: conversion of a small fixed set of types to a data format and
back
ex. NSJSONSerialization, NSPropertyListSerialization
Encoding: conversion of an arbitrary type to a smaller set of serialized types
and back
ex: Encoder, Decoder, JSONEncoder, PropertyListEncoder
Archiver: In the ObjC Foundation, the objects which do the encoding. In this
proposal we have chosen not to re-use this term to avoid confusion. Instead we
tried to simplify the terminology by calling the top level concrete object an
encoder.
- Tony
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