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    Andrew Arnott
    @AArnott
    @neuecc Since it looks like we may not have an agreed upon stable API by the end of this week, but I think there's hope we can reconcile our goals, so I bought some more time. I also see a hard problem in my use case that can only be solved by truly supporting streaming deserialization (neuecc/MessagePack-CSharp#437). I may actually try to work that into v2 instead of postponing to some future v3 in order to avoid two sets of massively API breaking changes.
    Yoshifumi Kawai
    @neuecc
    How to disable Directory.Build.props, Directory.Build.targets when open MessagePack.UnityClient.sln under MessagePack.UnityClient?
    Hirad Yazdanpanah
    @hiradyazdan
    @neuecc i haven’t seen any activity on Utf8Json since 2018, is this project obsolete?
    Andrew Arnott
    @AArnott
    What problem are the imports causing? You can't disable them, but we could rearrange the code so the props file isn't above the unity folder.
    Yoshifumi Kawai
    @neuecc
    image.png
    only Visual Studio, shows some error(but in Unity Editor works).
    @hiradyazdan Utf8Json and MessagePack adopts similar architecture. When MessagePack architecture will stable, I'll back.
    Hirad Yazdanpanah
    @hiradyazdan
    @neuecc you mean i can serialize json string to object and vice versa (not binaries/byte arrays) with messagepack too? i didn’t realize that! can you please point me to where and how i can do that? because wherever i looked there was nothing i could find in that regard. Or perhaps you mean the core is similar?
    Hirad Yazdanpanah
    @hiradyazdan
    the problem is if i have messagepack and utf8json both in one project, there will be a conflict for class vague match
    Andrew Arnott
    @AArnott
    @hiradyazdan Which class exactly causes the collision?
    @neuecc Can you open an issue to track the Directory.Build.Props unity issue?
    Hirad Yazdanpanah
    @hiradyazdan
    @AArnott there’s an issue for it already neuecc/Utf8Json#46 i have commented at th end.
    Hirad Yazdanpanah
    @hiradyazdan
    the suggestion in the issue, seems a bit overkill as one might not need to define separate assemblies on unity for example, for only different serializers where both share the same core logic
    Hirad Yazdanpanah
    @hiradyazdan
    @AArnott is there anyway to ignore null values from a serialized object in int key mode? I understand that int keys will set null if value not provided or indexes are skipped, as the receiver would be accepting the same key index, but what if sender has different indexing than receiver? say in two different environments where messagepack-csharp is used for the serializer only?
    Andrew Arnott
    @AArnott
    I'm not sure I understand your question, @hiradyazdan. In int key mode, MessagePack stores each field as an element in an array. If we didn't store a messagepack nil code in a slot of that array, what would we store instead? If we "compressed" it by simply omitting those elements then all the indexes would be off and the deserializer wouldn't know how to interpret each element.
    Hirad Yazdanpanah
    @hiradyazdan
    @AArnott can’t we skip the nil and reindex? let’s say in the IL or the generated code we reorder the elements if they have nil values before serializing to binaries
    the use case of this would be when there are two different model structures required for the same model, where one doesn’t need the elements that the other need (aiming to two different servers for example)
    Hirad Yazdanpanah
    @hiradyazdan
    if we could have an option that by choice we reindex the elements and exclude the nil values this scenario could be possible
    Hirad Yazdanpanah
    @hiradyazdan
    otherwise, you’d have to have an extra copy of the same model and its properties with different keys only, which is excessive from developers’ point of view!
    Andrew Arnott
    @AArnott
    @hiradyazdan: let's say you have a class with 4 properties that you're deserializing, and you receive a msgpack binary with ['a','d','g']. One of the properties are missing because it was nil. But which one was it?
    Hirad Yazdanpanah
    @hiradyazdan
    @AArnott oh i forgot to clarify, let’s say the deserializer is on another environment with different model structure which expects 3 properties already
    you have a deserializer using msgpack-csharp in c# env which can work fine without skipping nils and reindxing, and another one, on another server for example, that expects different model structure, which skips and reindex.
    Hirad Yazdanpanah
    @hiradyazdan
    i mean the class/struct which defines the properties on the other server only correspond to some of the properties in the first one, not all
    Andrew Arnott
    @AArnott
    It sounds like you have two potential schemas you want to serialize to. You can do that in either of two ways: The simplest is to define each schemas in terms of a C# class. Serialize an instance of the class based on where you're sending the serialized result. So if you have one destination that expects 3 properties and one that expects 4, instantiate and initialize both classes, and serialize each one.
    The other option is to write a custom formatter that knows to skip specific properties and serialize with that one when you want to omit them.
    Hirad Yazdanpanah
    @hiradyazdan
    @AArnott i like the second option, is there any example for this scenario already?
    Hirad Yazdanpanah
    @hiradyazdan
    when you say know to skip specific properties, do you mean it can only know by property name or its value? cuz if it’s by the name then wouldn’t cause a conflict for the other formatter where it needs those properties?
    Andrew Arnott
    @AArnott
    Of course it wouldn't skip based on value or else again the deserializer won't know which array index to deserialize into which property.
    pmArchitect
    @pmArchitect
    Is there a simple tutorial or step-by-step instructions on how to use MessagePack in Unity?
    Or an Example Project?
    Kevin Streicher
    @NoxMortem
    @pmArchitect There is nothing specific about MessagePack and Unity. Use it as the first code block in the readme on the repository shows. The ONLY thing unity specific is, that it can serialize some of the types of Unity. You still need to separete serializeable and non-serialiezable data and assign the values deserialized after loading to whatever you use in Unity.
    Andrew Arnott
    @AArnott
    @neuecc I think I'll release a stable 1.8 version so we can service it more easily than we can service the v1.7 branch. Any concerns?
    Andrew Arnott
    @AArnott
    I've released a stable 1.8 to nuget.org.
    @neuecc With #589 I think we've made all the public API and behavioral changes we want to for 2.0. How do you feel about a stable package?
    I'm going to go through the active PRs and maybe a few of the issues to see if any are best done before 2.0 stabilizes.
    (and probably aggressively close some stale PRs)
    Yoshifumi Kawai
    @neuecc
    @AArnott Yes, just I've completed working for IL2CPP. #591, #592
    Jakub Holovsky
    @JakubHolovsky
    Question - does Messagepack "mpc" support the new PackageReference attribute in csproj? A year ago it was not true so I wonder if the support has been added? Cheers
    Jon Steinich
    @jsteinich
    @JakubHolovsky it depends what version of mpc you are using. The universal code generator version does work, but it is slated to be deprecated. Some of the newest non-cross-platform versions also worked.
    Andrew Arnott
    @AArnott
    @neuecc I'm looking at your PR now. It's great to see several issues fixed by it.
    I notice that you were upset by the 'lint' causing PR build breaks. I'm happy to fix them, but I just wonder why they only hit you in the CI build. Don't you see them as build warnings locally?
    Yoshifumi Kawai
    @neuecc
    @AArnott thanks for looking. About lint, maybe #556, during working for Unity, I've deleted Directory.Build.props.
    Turik
    @turik441
    Hello.
    Can MessagePack c # deserialize an array of objects lazy?
    @neuecc Hello. Can MessagePack deserialize an array of objects lazy?
    Andrew Arnott
    @AArnott
    If you mean can it deserialize a Lazy<int>[], I think not. Even if it could, the values inside wouldn't actually be lazy -- they would have to be constructed at deserialization time. Unless perhaps you were willing to keep the ReadOnlySequence<byte> that you deserialized from around indefinitely.
    Turik
    @turik441
    @AArnott
    @AArnott I have a very large array of objects, when deserializing I can not load them into memory. I would like to use something like .deserialize <IEnumerable <myClass>>. And then the myClass object was deserialized only by accessing it in the foreach body
    Andrew Arnott
    @AArnott
    With some effort that could probably be done, again assuming you don't mind keeping the serialized form in memory while the enumerable isn't fully realized.
    But in order for the contents of your enumerable to have been serialized in the first place, it would have had to all be in memory. So is this even a real thing? If they can't all fit in memory at once, how did you serialize it in the first place?
    Turik
    @turik441
    @AArnott I serialized an array of objects using lazy evaluation
    Andrew Arnott
    @AArnott
    You had an array? So what, was it Lazy<T>[] ? And now you want to deserialize it lazily using IEnumerable<T>? Regardless, I imagine there's a few ways to do it, all of which requires that you hold the ReadOnlySequence<byte> that you deserialize from (or at least parts of it) in memory indefinitely (or until all elements have been fully realized).
    But IMO you should probably think about this differently. If you have a very large object graph, consider serializing it separately, and index it, so that you can look up that object and deserialize it on-demand when calling a particular method to access it. That way one person enumerating your lazily constructed collection won't permanently allocate a ton of memory in your process.
    Andrew Arnott
    @AArnott
    @turik441 I recently came across #109 which appears to be similar to your feature request. I added a comment there that explains how we might accomplish it (and how I'm accomplishing it already via some custom formatters I use in my app).