{a:int} means universal quantification.
What you need is probably existential quantification:


typedef M = @{
   rt = [a:int] RT(a)
}



On Tuesday, October 18, 2016 at 10:44:11 PM UTC-4, Arets Paeglis wrote:
>
> Hi,
>
> Assuming we have a record and its supporting definitions as follows,
> abst@ype RT(int) = int
> stadef Any = 0
>
> typedef M = @{
>     rt = {a: int} RT(a)
> }
>
> what is the proper way of initialising a value of type M? Doing 
>
> val m = @{ rt = RT(Any) } : M
>
> fails with error(2): the dynamic identifier [ReturnType] is unrecognized.
>
> What am I doing wrong? Thanks in advance.
>

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