[m-rev.] diff: common.m improvement

[Simon Taylor]

On 21-Apr-2005, Zoltan Somogyi <zs at cs.mu.OZ.AU> wrote:
> On 20-Apr-2005, Fergus Henderson <fjh at cs.mu.OZ.AU> wrote:
> > I think it might be better to have something like this:
> > 
> > 	common__types_match_exactly(Type1, Type2) :-
> > 		(
> > 		    Type1 = Type2
> > 		;
> > 		    % check if the types are the same when you
> > 		    % ignore the term.context fields
> > 
> > 		    % XXX should succeed for embedded constraints
> > 		    type_to_ctor_and_args(Type1, TypeCtor1, Args1),
> > 		    type_to_ctor_and_args(Type2, TypeCtor2, Args2),
> > 		    TypeCtor1 = TypeCtor2,
> > 		    common__types_match_exactly_list(Args1, Args2)
> > 		).
> 
> That's what I had originally, but then I had a bootcheck succeed after
> I modified common.m to abort if the first test failed the second succeeded.
> In other words, the second disjunct isn't adding anything; that's why
> I deleted it.

prog_io_util.convert_type removes the contexts.

Simon.
--------------------------------------------------------------------------
mercury-reviews mailing list
post:  mercury-reviews at cs.mu.oz.au
administrative address: owner-mercury-reviews at cs.mu.oz.au
unsubscribe: Address: mercury-reviews-request at cs.mu.oz.au Message: unsubscribe
subscribe:   Address: mercury-reviews-request at cs.mu.oz.au Message: subscribe
--------------------------------------------------------------------------