Protocol Buffers has no concept of "null". Lists can be empty, but not
"null".
On Mon, Jun 21, 2010 at 6:35 PM, Manh Do <mdo...@gmail.com> wrote:
> I am working a project where we need to determine if a protobuf list
> have is null or not in the protocol buffer.
>
> The problem is the generated c# automatically instantiates the list.
>
> IE. Protocol:
> message B {
> repeated A MyList = 0;
> }
>
> Generated C#:
>
> private readonly global::System.Collections.Generic.List<A> _MyList =
> new global::System.Collections.Generic.List<A>();
> [global::ProtoBuf.ProtoMember(0, Name=@"MyList", DataFormat =
> global::ProtoBuf.DataFormat.Default)]
> public global::System.Collections.Generic.List<A> MyList
> {
> get { return _MyList ; }
> }
>
> The problem with this is I cannot determine if the list is null. I am
> using an empty list as a way to remove all objects.
>
> Is there a way where I can make the generator not automatically
> instantiate the list? Better yet, how do I check for default values in
> protocol buffer C#? I know you can check for
> 'default(typeof(MyType));'.
>
> Thanks for the help!
>
> -Manh
>
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