Re: Nested Prolog term to JSON object conversion

Hi Wouter,

On 07/13/2013 08:47 PM, Wouter Beek wrote:
> Hi all,
>
> Has somebody been able to convert nested Prolog terms into JSON objects
> using json_object/1 declarations?
>
> ~~~
> :- module(test, [test/0]).
>
> :- use_module(library(http/json_convert)).
>
> :- json_object circle(coord:atom) + [type=circle].
> :- json_object coord(x:float, y:float) + [type=coord].
>
> test:-
>    prolog_to_json(circle(coord(3.4,4.3)), JSON_Object),
>    format(user_output, '~w', JSON_Object).
> ~~~
>
> At some points in the trace, the contents of coord/1 are assumed to be
> atomic :-(

That makes sense if you state circle(coord:atom).  If you change this 
into circle(coord:coord/2), you get:

3 ?- test.
json([coord=json([x=3.4,y=4.3,type=coord]),type=circle])

	Cheers --- Jan

P.s.	Note that 6.3.19 has several additions and fixes for the
	json_convert.pl library.


>
> ---
> Cheers!,
> Wouter.
>
> E-mail: [email protected]
> WWW: www.wouterbeek.com
> Tel.: 0647674624
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