Quote: failure of a routine occurs when it can't fulfill its specification; use rescue clauses for resumption or organized panic

Quotation Skeleton

If a routine is seen not just as … define a notion of failure. Failure occurs when … "Exception" is a derived notion. An exception occurs … failure, at least not yet, because the routine … [If so, have resumption; if not, restore objects to the class invariant and report failure (organized panic). The corresponding code is the rescue clause]   Google-1   Google-2

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Quote: an exception occurs when a strategy for fulfilling a routine's contract fails

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Topic: exception handling by recovery block or rescue clause (22 items)