8000 feat: generalize withCtor functions to eliminate to Sort by nomeata · Pull Request #8994 · leanprover/lean4 · GitHub
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feat: generalize withCtor functions to eliminate to Sort #8994

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feat: generalize withCtor functions to eliminate to Sort #8994

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@nomeata nomeata commented Jun 25, 2025

This PR generalizes the withCtor functions used for noConfusionType to eliminate into Sort.

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nomeata commented Jun 25, 2025

Parking this for now, before #8973 has proved its merits. I’m wary of all the imax floating around, but maybe it just works.

If it does, this may makes the withCtor functions (or variants thereof, e.g. total ones that take a proof that it’s that constructor index, and/or with a refining motive like a matcher) generally useful.

@github-actions github-actions bot added the toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN label Jun 25, 2025
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Mathlib CI status (docs):

  • ❗ Batteries CI can not be attempted yet, as the nightly-testing-2025-06-24 tag does not exist there yet. We will retry when you push more commits. If you rebase your branch onto nightly-with-mathlib, Batteries CI should run now. You can force Mathlib CI using the force-mathlib-ci label. (2025-06-25 08:48:02)

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