This sounds exactly like Java's checked exceptions. | Hacker News

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		millstone on April 30, 2019 \| parent \| context \| favorite \| on: Go 1.13: xerrors This sounds exactly like Java's checked exceptions.

Fellshard on April 30, 2019 [–]

The two are closely related concepts. You can model checked exceptions as a secondary return type, except without the same first-order representation (e.g. inability to specify checked exceptions in generic terms).

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