lean4-htt

Author SHA1 Message Date

Author	SHA1	Message	Date
Kyle Miller	7fa1a8b114	chore: eliminate uses of `intros x y z` (#9983 ) This PR eliminates uses of `intros x y z` (with arguments) and updates the `intros` docstring to suggest that `intro x y z` should be used instead. The `intros` tactic is historical, and can be traced all the way back to Lean 2, when `intro` could only introduce a single hypothesis. Since 2020, the `intro` tactic has superceded it. The `intros` tactic (without arguments) is currently still useful.	2025-08-19 06:09:13 +00:00
Leonardo de Moura	5f38a483f2	fix: `congr` tactic `MVarId.congr?` and `MVarId.hcongr?` should return `none` if an exception is thrown while applying congruence theorem. `MVarId.hcongr?` should try `eq_of_heq` before trying to apply `hcongr` theorem. closes #1787 BTW: Lean 4 `congr` tactic is applying `assumption`. Lean 3 version does not.	2022-10-28 08:00:04 -07:00

Kyle Miller

7fa1a8b114

chore: eliminate uses of intros x y z (#9983 )

This PR eliminates uses of `intros x y z` (with arguments) and updates
the `intros` docstring to suggest that `intro x y z` should be used
instead. The `intros` tactic is historical, and can be traced all the
way back to Lean 2, when `intro` could only introduce a single
hypothesis. Since 2020, the `intro` tactic has superceded it. The
`intros` tactic (without arguments) is currently still useful.

2025-08-19 06:09:13 +00:00

Leonardo de Moura

5f38a483f2

fix: congr tactic

`MVarId.congr?` and `MVarId.hcongr?` should return `none` if an
exception is thrown while applying congruence theorem.

`MVarId.hcongr?` should try `eq_of_heq` before trying to apply
`hcongr` theorem.

closes #1787

BTW: Lean 4 `congr` tactic is applying `assumption`. Lean 3 version does not.

2022-10-28 08:00:04 -07:00

2 commits