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I've written functions to derive symbols based off of other symbols (i.e. spreads to outrights and vice/versa) and am finding that there's no possible way to detect if a symbol is even valid before calling sym(). Exception handling doesn't seem to work either.
Does not work for me as a method of trapping it either. The script just dies with an error. I'd prefer to not have to use an exception if there were another way anyway.
Code:
try {
sym(potentially_invalid_symbol);
} catch (err) {
sym(other_symbol);
}