Error Trapping Functions (aime)

13.12.2 Error Trapping Functions

trap
trap_d
trap_q
wrap
wrap_d
wrap_q

trap

integer trap(object o, &...);

is zero if the function indicated by o called with the unnamed arguments of ‘trap’ as arguments executed successfully, non zero otherwise

trap_d

integer trap_d(text &e, object o, &...);

is zero if the function indicated by o called with the unnamed arguments executed successfully, non zero otherwise. e is set to the error report if any was issued and not modified otherwise.

trap_q

integer trap_q(object o, &...);

same as ‘trap’, only with error reporting suppressed

wrap

integer wrap(&, object o, &...);

is zero if the function indicated by o called with the consequent arguments of ‘wrap’ as arguments executed successfully, non zero otherwise. The first argument is set to the function evaluation result, if there was any (i.e. call was successful).

wrap_d

integer wrap_d(text &e, &, object o, &...);

is zero if the function indicated by o called with the consequent arguments executed successfully, non zero otherwise. The second argument is set to the function evaluation result, if there was any. e is set to the error report if any was issued and not modified otherwise.

wrap_q

integer wrap_q(&, object o, &...);

same as ‘wrap’, only with error reporting suppressed