Sebastian Graf 5f4d724c2d feat: abstract metavariables when generalizing match motives (#8099) (#11696) ... This PR improves `match` generalization such that it abstracts metavariables in types of local variables and in the result type of the match over the match discriminants. Previously, a metavariable in the result type would silently default to the behavior of `generalizing := false`, and a metavariable in the type of a free variable would lead to an error (#8099). Example of a `match` that elaborates now but previously wouldn't: ```lean example (a : Nat) (ha : a = 37) := (match a with | 42 => by contradiction | n => n) = 37 ``` This is because the result type of the `match` is a metavariable that was not abstracted over `a` and hence generalization failed; the result is that `contradiction` cannot pick up the proof `ha : 42 = 37`. The old behavior can be recovered by passing `(generalizing := false)` to the `match`. Furthermore, programs such as the following can now be elaborated: ```lean example (n : Nat) : Id (Fin (n + 1)) := have jp : ?m := ?rhs match n with | 0 => ?jmp1 | n + 1 => ?jmp2 where finally case m => exact Fin (n + 1) → Id (Fin (n + 1)) case jmp1 => exact jp ⟨0, by decide⟩ case jmp2 => exact jp ⟨n, by omega⟩ case rhs => exact pure ``` This is useful for the `do` elaborator. Fixes #8099.		2025-12-16 14:34:29 +00:00
..
Command	feat: with_weak_namespace command (#11338)	2025-11-25 02:37:40 +00:00
Deriving	feat: suggest deriving an instance when the instance might be derivable (#11346)	2025-12-01 14:28:15 +00:00
Do	feat: new do elaborator, part 1: doElem_elab attribute (#11150)	2025-11-12 14:25:28 +00:00
DocString	chore: fix spelling (#11531)	2025-12-06 13:54:27 +00:00
InfoTree	feat: unknown identifier code action and the module system (#11164)	2025-12-12 21:19:34 +00:00
PreDefinition	feat: do not have meta imply partial (#11587)	2025-12-12 11:42:42 +00:00
Quotation	chore: remove redundant imports in core (#10750)	2025-10-16 20:27:46 +00:00
Tactic	feat: abstract metavariables when generalizing match motives (#8099) (#11696)	2025-12-16 14:34:29 +00:00
Term	feat: lint coercions that are deprecated or banned in core (#11511)	2025-12-12 15:09:13 +00:00
App.lean	feat: identifier suggestions for non-dotted identifiers (#11619)	2025-12-11 19:47:18 +00:00
Arg.lean
Attributes.lean	fix: shake: register attribute rev use independent of initialize kind (#11293)	2025-11-20 20:39:27 +00:00
AutoBound.lean	feat: improve error when an identifier is unbound because autoImplicit is off (#11119)	2025-11-19 03:11:34 +00:00
AuxDef.lean
BinderPredicates.lean	chore: remove redundant imports in core (#10750)	2025-10-16 20:27:46 +00:00
Binders.lean	chore: make auto param decls of private decls private (#11581)	2025-12-11 01:10:45 +00:00
BindersUtil.lean	fix: preserve error locations when expanding match arms (#10783)	2025-10-15 13:31:42 +00:00
BuiltinCommand.lean	chore: rename String.endPos -> String.rawEndPos (#10853)	2025-10-21 11:25:30 +00:00
BuiltinEvalCommand.lean	refactor: make MatchEqs a leaf module (#11493)	2025-12-03 09:15:36 +00:00
BuiltinNotation.lean	feat: identifier suggestions on some autobinding failures (#11621)	2025-12-11 21:40:16 +00:00
BuiltinTerm.lean	chore: further shake improvements (#10947)	2025-10-26 11:27:19 +00:00
Calc.lean
CheckTactic.lean
Coinductive.lean	chore: fix spelling (#11531)	2025-12-06 13:54:27 +00:00
Command.lean	feat: unknown identifier code action and the module system (#11164)	2025-12-12 21:19:34 +00:00
ComputedFields.lean
Config.lean
Declaration.lean	feat: shake: make Mathlib-ready (#11496)	2025-12-05 09:37:58 +00:00
DeclarationRange.lean	chore: remove redundant imports in core (#10750)	2025-10-16 20:27:46 +00:00
DeclModifiers.lean	feat: do not have meta imply partial (#11587)	2025-12-12 11:42:42 +00:00
DeclNameGen.lean
DeclUtil.lean	chore: remove redundant imports in core (#10750)	2025-10-16 20:27:46 +00:00
DefView.lean	chore: remove redundant imports in core (#10750)	2025-10-16 20:27:46 +00:00
Deriving.lean	feat: deriving ReflBEq and LawfulBEq (#10351)	2025-09-16 12:58:01 +00:00
Do.lean	feat: new do elaborator, part 1: doElem_elab attribute (#11150)	2025-11-12 14:25:28 +00:00
DocString.lean	chore: fix typo "Unkown" -> "Unknown" in role error message (#11682)	2025-12-15 14:29:11 +00:00
ElabRules.lean	feat: new do elaborator, part 1: doElem_elab attribute (#11150)	2025-11-12 14:25:28 +00:00
ErrorExplanation.lean	chore: remove redundant imports in core (#10750)	2025-10-16 20:27:46 +00:00
ErrorUtils.lean	feat: hint when an autobound variable's type fails to be a function (#11518)	2025-12-05 03:07:16 +00:00
Eval.lean
Exception.lean	chore: remove redundant imports in core (#10750)	2025-10-16 20:27:46 +00:00
Extra.lean
Frontend.lean	feat: reduce server memory consumption (#11162)	2025-12-01 10:53:23 +00:00
GenInjective.lean
GuardMsgs.lean	refactor: use String.split instead of String.splitOn or String.splitToList (#11250)	2025-11-19 09:35:19 +00:00
Import.lean	fix: symbol clashes between packages (#11082)	2025-11-19 02:24:44 +00:00
Inductive.lean	chore: make declMetaExt persistent for shake (#11201)	2025-11-16 20:11:56 +00:00
InfoTree.lean	chore: remove public section from end of files (#10684)	2025-10-06 13:30:48 +00:00
InfoTrees.lean
InheritDoc.lean	chore: remove redundant imports in core (#10750)	2025-10-16 20:27:46 +00:00
LetRec.lean	chore: remove redundant imports in core (#10750)	2025-10-16 20:27:46 +00:00
Level.lean	chore: remove redundant imports in core (#10750)	2025-10-16 20:27:46 +00:00
Macro.lean
MacroArgUtil.lean	chore: remove redundant imports in core (#10750)	2025-10-16 20:27:46 +00:00
MacroRules.lean	chore: error messages consistency (#10143)	2025-08-26 17:55:43 +00:00
Match.lean	feat: abstract metavariables when generalizing match motives (#8099) (#11696)	2025-12-16 14:34:29 +00:00
MatchAltView.lean
MatchExpr.lean
Mixfix.lean	feat: enable notationItem in "mixfix" notation commands (#10378)	2025-09-14 18:54:36 +00:00
MutualDef.lean	feat: unknown identifier code action and the module system (#11164)	2025-12-12 21:19:34 +00:00
MutualInductive.lean	chore: fix spelling (#11531)	2025-12-06 13:54:27 +00:00
Notation.lean	chore: remove redundant imports in core (#10750)	2025-10-16 20:27:46 +00:00
Open.lean	feat: backward.privateInPublic option (#10807)	2025-10-16 20:51:45 +00:00
Parallel.lean	refactor: move Iter and others from Std.Iterators to Std (#11446)	2025-12-15 08:24:12 +00:00
ParseImportsFast.lean	refactor: move operations on String.Pos.Raw to the String.Pos.Raw namespace (#10735)	2025-10-18 12:12:55 +00:00
PatternVar.lean	feat: suggestions for ambiguous dotted identifiers (#11555)	2025-12-09 17:27:22 +00:00
PreDefinition.lean	feat: generate equational theorems uniformly (#10734)	2025-10-10 21:35:09 +00:00
Print.lean	chore: make declMetaExt persistent for shake (#11201)	2025-11-16 20:11:56 +00:00
Quotation.lean	refactor: use String.Slice in String.take and variants (#11180)	2025-11-18 16:13:48 +00:00
RecAppSyntax.lean
RecommendedSpelling.lean	chore: remove redundant imports in core (#10750)	2025-10-16 20:27:46 +00:00
SetOption.lean	chore: remove redundant imports in core (#10750)	2025-10-16 20:27:46 +00:00
StructInst.lean	chore: fix spelling (#11531)	2025-12-06 13:54:27 +00:00
StructInstHint.lean	refactor: deprecate String.posOf and variants in favor of unified String.find (#11276)	2025-11-23 18:39:53 +00:00
Structure.lean	chore: make declMetaExt persistent for shake (#11201)	2025-11-16 20:11:56 +00:00
Syntax.lean	refactor: use String.Slice in String.take and variants (#11180)	2025-11-18 16:13:48 +00:00
SyntheticMVars.lean	fix: ensure by uses expected instead of given type for modsys aux decl (#11673)	2025-12-14 17:44:38 +00:00
Tactic.lean	chore: remove redundant imports in core (#10750)	2025-10-16 20:27:46 +00:00
Task.lean	feat: parallelism utilities for MetaM/TacticM (#11333)	2025-11-24 23:42:30 +00:00
Term.lean	chore: remove redundant imports in core (#10750)	2025-10-16 20:27:46 +00:00
Time.lean
Util.lean	fix: when constructing instance names, avoid private names (#11385)	2025-11-26 18:16:44 +00:00
WhereFinally.lean