Apologies, a line from the cut-down example went missing. It should read:
local datatype THEOREM = D of (int * int); in type THEOREM = THEOREM; exception NOT_ALLOWED; infix D; fun axiom m = if m <> 0 then m D m else raise NOT_ALLOWED; end;
On 31 Oct 2024, at 21:42, Rob Arthan <rda at lemma-one.com> wrote:
Dear All,
I am trying re-use some demo code that I wrote some years ago and am getting different output from what I previously got.
A cut-down version of the code is as follows:
local datatype THEOREM = D of (int * int); in type THEOREM = THEOREM; infix D; fun axiom m = if m <> 0 then m D m else raise NOT_ALLOWED; end; axiom 1;
The output I used to get was:
infix 0 D eqtype THEOREM val axiom = fn: int -> THEOREM val it = 1 D 1: THEOREM
The output I now get is:
infix 0 D eqtype THEOREM val axiom = fn: int -> THEOREM val it = D (1, 1): THEOREM
Can I do something to persuade the pretty-printer to use infix notation for the constructor D? (In a real application, I would install my own pretty-printer for the type THEOREM, but that would be an annoying distraction in the talk that the demo code accompanies.)
Regards,
Rob.
polyml mailing list polyml at inf.ed.ac.uk http://lists.inf.ed.ac.uk/mailman/listinfo/polyml