Throws a syntax error. Used when the sequence of characters being read are not syntactically valid. This built-in method is declared private and thus cannot be used as a message to an object. Calling this predicate is equivalent to the following sequence of goals:
..., context(Context), throw(error(syntax_error(Description), Context)).
This allows the user to generate errors in the same format used by the runtime.
Modes and number of proofs
syntax_error(@nonvar) - error