Exception handling (TRY)

The exception handling operator enables you to execute an action and do the following if an error (exception) occurs:

• ignore this error,
• execute a different action, then pass the error to the top action (as if the operation didn't exist),
• execute a different action regardless of whether there's been an error or not, then pass the error to the top action (as if this operator didn't exist)

Language

To declare an exception handling action, use the TRY operator.

Examples

tryToImport(FILE f)  {
    TRY {
        LOCAL a = BPSTRING[10] (INTEGER);

        IMPORT XLS FROM f TO a = A;
    }
}

CLASS MyLock {
    lock 'Blocking'
}

singleDo ()  {
    NEWSESSION {
        lock(MyLock.lock);
        IF lockResult() THEN
        TRY {
            MESSAGE 'Lock Obtained';
        } CATCH {
            MESSAGE messageCaughtException();
        } FINALLY unlock(MyLock.lock);
    }
}