11.3.99 ground/1

Synopsis

ground(+Term)

Term is currently instantiated to a ground term.

Arguments

Term

term

Description

Tests whether X is completely instantiated, i.e. free of unbound variables. In this context, mutable terms are treated as nonground, so as to make ground/1 a monotone predicate.

Examples

     | ?- ground(9).
     
     yes
     | ?- ground(major(tom)).
     
     yes
     | ?- ground(a(1,Term,3)).
     
     no
     | ?- ground("a").
     
     yes
     | ?- ground([1,foo(Term)]).
     
     no

See Also

ref-lte-met-typ.