On Fri, 12 Mar 2021 17:43:05 +0000, Frank Swarbrick wrote: > ... >If only COBOL had "tagged redefines" (see also "tagged unions", "sum types", >"variant types" and many other names for the same idea). > Like ALGOL 68 conforms-to-and-becomes? > >________________________________ >From: Tom Ross <[email protected]> >Sent: Friday, March 12, 2021 9:44 AM > ... We, of course, >NEVER used to test with invalid data (data that does not match the PICTURE >and USAGE) so this is a challenging job! > Think "Fuzz Testing". The past tense "used to" seems laudable. I often imagined grabbing a fistful of cards (yes, those) from the wasetbasket and using them as "//SYSIN DD *" to test error handling.
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