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nonvar(?Term)

Succeeds if Term is instantiated.
Term
Any Prolog term.

Description

Used to test whether Term is instantiated. This is the negation of var/1, i.e. it succeeds if Term is not an uninstantiated variable. Note that it also succeeds if Term is a partially instantiated term, i.e. a compound term with at least one uninstantiated subterm.

Modes and Determinism

Fail Conditions

Fails if Term is not instantiated

Examples

   Success:
   nonvar(atom).
   nonvar(33).
   nonvar(foo(3)).
   nonvar(foo(_)).
   nonvar([_|_]).
   Fail:
   nonvar(Var).

See Also

nonground / 1, type_of / 2, var / 1