https://hackerpaper.kaipfister.de/p/2001.10490/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMThttps://news.ycombinator.com/item?id=44567129urn:hackerpapers:mention:2001.10490:44567129Tue, 15 Jul 2025 01:49:18 GMT<p>The system used in Lean 4 is explained in https://arxiv.org/abs/2001.10490v7 (Ullrich and Moura, &quot;Beyond Notations: Hygienic Macro Expansion for Theorem Proving Languages&quot;). There&#x27;s still a set-of-scopes system, but it seems to be pretty different from https://users.cs.utah.edu/plt/scope-sets/ (And to clarify what I wrote previously, each identifier has a list of macro scopes.) The set-of-scopes in Lean 4 is for correct expansion of macro-creating-macros. The scopes are associated to macro expansions rather than binding forms. Lean&#x27;s syntax quotations add the current macro scope to every…</p><p><a href="https://hackerpaper.kaipfister.de/p/2001.10490/">Paper and discussion history</a>. A mention is not an endorsement.</p>cs.PLhttps://news.ycombinator.com/item?id=41311292urn:hackerpapers:submission:2001.10490:41311292Wed, 21 Aug 2024 15:34:54 GMT<p>Beyond Notations: Hygienic Macro Expansion for Theorem Proving Languages</p><p></p><p>4 points; 2 discussion replies on HN. <a href="https://hackerpaper.kaipfister.de/p/2001.10490/">Paper and source history</a>. A submission is not an endorsement.</p>cs.PL