
nonground(?Term, -Variable)

   Succeeds if Term is not a ground term and binds Variable to one of the
variables inside Term.



Arguments
   Term                Prolog term.
   Variable            A variable.

Type
   Type Testing

Description
   Used to test whether Term is not ground i.e. whether it contains at
   least one free variable.  The argument Variable is unified with one of
   the variables inside Term, i.e. with one of the responsibles for its
   non-groundness.  When Term contains several variables, it is not
   specified which one will be returned as Variable.  As usual, attributed
   variables are also considered variables.




Modes and Determinism
   nonground(?, -) is semidet

Fail Conditions
   Fails if Term is ground

Examples
   
Success:
    nonground(Term, V).       % unifies V with Term
    nonground(f(a,B,c), V).   % unifies V with B
    nonground([x,Y|Z], V).    % unifies V with Y or Z
    nonground(s(X{a}), V).    % unifies V with X{a}

Fail:
    nonground(atom, V).
    nonground(likes(man, woman), V).





See Also
   nonground / 1, nonground / 3, nonvar / 1, var / 1
