Covariance and contravariance: a fresh look at an old issue (a primer in advance [pdf]

2026-10-09来源 Hacker News NewEnglish

Article URL: https://www.irif.fr/~gc/papers/covcon-again.pdf

Comments URL: https://news.ycombinator.com/item?id=50019110

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原文：https://www.a8q9.cn/en/article/covariance-and-contravariance-a-fresh-look-at-an-old-issue-a-primer-in-advance-p-bc9f65.html

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