const IList, ISet, IMap etc? about fast_immutable_collections HOT 8 CLOSED

You should use this pattern instead:

class Sample {
  final IList<String> list;

  Sample({ Iterable<String> list = const [] }) 
         : list = IList(list);
}

This way you can accept any Iterable in the constructor. Note, if the constructor is passed an IList it will just reuse the same instance (the IList constructor will return the original list instance if it's an IList already).

Also note: I intend on allowing for a const IList in the future, but that's not as easy as it seems, because the IList has mutable information. For example, it caches the hashCode and it can be "flushed". However, it is possible to allow for a const constructor, but it needs some work, and I haven't had the time yet.

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Version [5.0.0-dev.1 ] now has an experimental const IList.

Examples:

const IList<String> myList = IListConst();

const IList<int> myList = IListConst([1, 2, 3]);

You actually have to use it through the IListConst subclass, and you cannot forget to use the const keyword (otherwise it will be unsafe).

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@venkatd Sure. I'll ping you in Whatsapp tomorrow and we can discuss it.

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Version [5.0.0-dev.8] now has both a const IList and a const ISet.

It now also includes the necessary explanation in the Readme.

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Do you have any plans to add a const IMap too? I want to use your library with my redux AppState (which needs to be const), but without a const IMap, I cannot.

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@sezaru Sure, that's why this issue is still open. I just need to find the time.

However, why does your AppState need to be constant?

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@marcglasberg Perhaps we could sponsor the development of IMapConst? It's useful for us because it allows us to declare things like form data with const constructors (to setup default values)

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Done: version 7.0.0.

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