[m-rev.] for review: field names and higher order values in the debugger

[Zoltan Somogyi]

On 19-Dec-2001, Fergus Henderson <fjh at cs.mu.OZ.AU> wrote:
> > 	Deconstruct closures as if they were ordinary terms, with the function
> > 	symbol being the name of the predicate/function and the arguments being
> > 	the terms stored in the closure.
> 
> Allowing deconstruction of closures breaks referential transparency for
> std_util__deconstruct and the like.

Actually, deconstruction already breaks referential transparency for DU terms
with variable tags (for HAL), for c_pointers, typeinfos, typeclassinfos etc.
I would prefer to fix them all together.

> > +++ runtime/mercury_ml_expand_body.h	2001/12/18 03:33:42
> > @@ -549,8 +621,88 @@
> >  
> >          case MR_TYPECTOR_REP_PRED:
> >              /* XXX expand_info->non_canonical_type = TRUE; */
> 
> After your change, the code inside the comment there is needed.

I will uncomment that code when I add cc_multi versions of the deconstruction
predicates, probably next week. Before that, uncommenting would cause an abort
when trying to deconstruct closures.

> > +:- pragma foreign_proc("C#",
> > +        named_argument(_Term::in, _ArgumentName::in) = (_ArgumentUniv::out),
> > +        [will_not_call_mercury], "
> > +{
> > +	mercury.runtime.Errors.SORRY(""foreign code for argument"");
> > +	// XXX this is required to keep the C# compiler quiet
> > +	SUCCESS_INDICATOR = false;
> > +}").
> 
> It would be better to write that as Mercury code,
> like I did in private_builtin.m.

The rules for those were hashed out while I was concentrating on other things,
so I will do that change (not just for named_argument, but for all the other
similar predicates in that module) later.

I have followed your other suggestions.

Zoltan.
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