Actually, I have mistyped the definition of chain before. I am sorry. The
definitions are:

datatype chain = Link of int * (int -> chain);
fun ints(n) = Link(n + 1, ints);

And for these definitions, Poly/ML does not work, but SML/NJ does.

Best regards,

Roní Gonçalves.

2017-07-04 13:37 GMT-03:00 Roní Gonçalves <[email protected]>:

> Hello, everyone!
>
> I am reading The Little MLer from Matthias Felleisen and Daniel Friedman
> using Poly/ML interpreter.
>
> In chapter 7, whe have some sort of stream implementation:
>
> datatype chain = Link of datatype chain = Link of int * (int -> chain);
> fun ints(n) = Link(n + 1, ints);
>
> When I try to define the function ints in Poly/ML 5.6 interpreter, it does
> not work, it runs forever. But when I write the same code in SML/NJ v110.78
> interpreter, things work. Is this difference in their behaviors a bug or is
> it normal or expected?
>
> Best regards,
>
> Roní Gonçalves.
>
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