:- use_module(library(prolog_stack)).
:- use_module(library(error)).

is_dict(T) :- is_assoc(T).
dict_new(T) :- T=t{}.
dict_set(T,X,V,T2) :- put_dict([X=V],T,T2).
dict_get(T,X,V,T2) :- get_dict(X, T, V).%t{X=V}.