Error status and message handling. A custom reciprocal routine uses catch_error and set_success. The main checks a successful result, zero rejection with an exact code and message, and a subsequent successful call clearing the error. No source edits. The reciprocal is only a driver, not a mathematical procedure supplied by errstat. Optional omitted-status termination and user-defined task/message repositories are not exercised.
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Build record verified 2026-10-29.
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Error status and message handling. A custom reciprocal routine uses catch_error and set_success. The main checks a successful result, zero rejection with an exact code and message, and a subsequent successful call clearing the error. No source edits. The reciprocal is only a driver, not a mathematical procedure supplied by errstat. Optional omitted-status termination and user-defined task/message repositories are not exercised. The R3 driver checks nine success/failure/recovery calls with exact codes/messages, signed-zero and NaN input rejection, independent copied statuses, appended context and explicit reset. The illustrative safe square-root ratio is supplied by the driver, not errstat.