Arreglos_poderosos_json, Prolog

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objeto:- write('{'),read(X), (X='atributo'->atributo; write('')) ,write('}').
atributo:- read(X), write('"'), write(X), write('":'),tipoatributo(X),a1. 
a1:- read(X),(X='atributo'-> write(','),atributo;(X='fin'->write(''))).
dato(M):- tipoatributo(M),a3. 
a3:- read(X),(X='dato'-> write(','),dato(X);(X='fin'->write(''))).
tipoatributo(M):- read(X), (X='metodo'->metodo(M); (X='numero'->numero); (X='cadena'->cadena); (X='objeto'->objeto); (X='arreglo'->arreglo); write('error')).
arreglo:- write('['), read(X), (X='dato'->dato(X); write('')), write(']').
cadena:- read(X), write('"'), write(X), write('"').
numero:- read(X), write(X).
metodo(M):- write('"function() {'),a2,write(' return '), write(M), write(';}"').
a2:- read(X), (X='decision'->decision;(X='asignacion'->asignacion; (X='fin' -> write('')); (write('ERROR: '),write(X)))).
asignacion:- read(X), write(X), write('='), read(Y), write(Y), write(';'),a2.
decision:- write('if('),condicion,write(')'), verdadero, write('}'),falso,write('}').
condicion:-read(X), write(X).
verdadero:- write('{'),a2.
falso:- write('else {'),a2.
:-objeto.

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