remove_exception_function
remove_exception_function — removes an exception function from a symbol.
Syntax
remove_exception_function (symbol, exc_fn)
Arguments
- symbol
- The point name, as a symbol, from which to remove the exception function.
- exc_fn
- The exception function body.
Returns
The exception function which was removed, or nil if no function was
removed.
Description
This function removes an exception function (Cogent DataHub exception
handler) from the symbol. The
exc_fn is compared to all of the current
exception functions for the symbol using
the comparison function eq.
Example
Gamma> add_exception_function(#temp, #princ("temp change\n"));
(princ "temp change\n")
Gamma> next_event();
temp change
(t)
Gamma> temp;
40
Gamma> remove_exception_function(#temp, #princ("temp change\n"));
(princ "temp change\n")
Gamma> next_event();
nil
Gamma> temp;
35
Gamma>
