Exceptions/Catch an exception thrown in a nested call: Difference between revisions

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Show how to create a user-defined exception and
Show how to create a user-defined exception   and   show how to catch an exception raised from several nested calls away.
show how to catch an exception raised from several nested calls away.


# Create two user-defined exceptions, U0 and U1.
:#   Create two user-defined exceptions,   '''U0'''   and   '''U1'''.
# Have function foo call function bar twice.
:#   Have function   '''foo'''   call function   '''bar'''   twice.
# Have function bar call function baz.
:#   Have function   '''bar'''   call function   '''baz'''.
# Arrange for function baz to raise, or throw exception U0 on its first call, then exception U1 on its second.
:#   Arrange for function   '''baz'''   to raise, or throw exception   '''U0'''   on its first call, then exception   '''U1'''   on its second.
# Function foo should catch only exception U0, not U1.
:#   Function   '''foo'''   should catch only exception   '''U0''',   not   '''U1'''.


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