[CakeML-Dev] reusing a CF specification

[Armaël Guéneau]

Right. Humm, I don't see an obvious reason why it wouldn't work.

To debug, run xapp_prepare_goal; the goal becomes something of the form:

   app p word8_fromint_v ...

then xapp will search the environment for a theorem of the form ``(Arrow 
_ _) _ word8_from_int_v``


On 14/10/2016 11:46, Michael.Norrish at data61.csiro.au wrote:
> I just copied the code out of basisProg; that has
>
> - -
> val _ = ml_prog_update (open_module "Word8");
>
> val _ = append_dec ``Dtabbrev [] "word" (Tapp [] TC_word8)``;
> val _ = trans "fromInt" `n2w:num->word8`
> val _ = trans "toInt" `w2n:word8->num`
>
> val _ = ml_prog_update (close_module NONE);
> - -
>
> Michael
>
> On 14/10/16, 20:44, "Armaël Guéneau" <armael.gueneau at ens-lyon.fr> wrote:
>
>      Did you store the specification you proved?
>      
>      On 14/10/2016 11:39, Michael.Norrish at data61.csiro.au wrote:
>      > I’ve got as far as something like
>      >
>      >    0.  NUM n nv
>      >    1.  n + 1 < LENGTH a
>      > ------------------------------------
>      > cf_app p (Var (Long "Word8" "fromInt")) [Lit (IntLit 0)] (…)
>      >    (W8ARRAY av a) (POSTv zv. &WORD 0w zv)
>      >
>      >
>      > where Word8.fromInt has been declared and characterized by code identical to that in basisProgTheory, but I don’t know how to use the proved specification: xapp throws an exception.
>      >
>      > What am I doing wrong?
>      >
>      > Many thanks,
>      > Michael.
>      >
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