Availability:C-language interface function
term_t PL_exception(qid_t
qid)If PL_next_solution()
fails, this can be due to normal failure of the Prolog call, or because
an exception was raised using throw/1.
This function returns a handle to the exception term if an exception was
raised, or (term_t)0 if the Prolog goal simply failed. If
there is an exception, PL_exception()
returns a term reference that contains the exception term.
Additionally, PL_exception(0) returns the pending
exception in the current query or (term_t)0 if no exception
is pending. This can be used to check the error status after a failing
call to, e.g., one of the unification functions.
0 
