Leonardo de Moura f1c903ca65 feat: simplify lambdas in Sym.simp (#11898) ... This PR adds support for simplifying lambda expressions in `Sym.simp`. It is much more efficient than standard simp for very large lambda expressions with many binders. The key idea is to generate a custom function extensionality theorem for the type of the lambda being simplified. This technique is compatible with the standard `simp` tactic, and will be ported in a separate PR. <img width="581" height="455" alt="image" src="https://github.com/user-attachments/assets/5911dc6c-03f0-48ed-843b-b8cb4f67ee61" /> ### `lambda` benchmark summary | Lambda size | MetaM (ms) | SymM (ms) | Speedup | |-------------|------------|-----------|---------| | 50 | 22.7 | 0.74 | ~31× | | 100 | 120.5 | 1.75 | ~69× | | 150 | 359.6 | 2.90 | ~124× | | 200 | 809.5 | 4.51 | ~180× |		2026-01-05 01:00:30 +00:00
..
Compiler	refactor: DiscrTree (#11875)	2026-01-02 19:53:45 +00:00
Data	feat: add optional start position to PersistentArray.forM (#11784)	2025-12-23 22:12:02 +00:00
DocString	chore: minor String API improvements (#11439)	2025-12-01 11:44:14 +00:00
Elab	feat: add insertPattern for discrimination tree insertion in Sym (#11884)	2026-01-03 19:27:43 +00:00
Language	feat: module system is no longer experimental (#11637)	2025-12-12 21:20:26 +00:00
LibrarySuggestions	fix: improve "no library suggestions engine registered" error message (#11464)	2025-12-02 00:55:46 +00:00
Linter	feat: lint coercions that are deprecated or banned in core (#11511)	2025-12-12 15:09:13 +00:00
Meta	feat: simplify lambdas in Sym.simp (#11898)	2026-01-05 01:00:30 +00:00
Parser	refactor: move error explanation text to the manual (#11688)	2025-12-26 17:14:58 +00:00
ParserCompiler
PrettyPrinter	refactor: move Std.Range to Std.Legacy.Range (#11438)	2025-12-18 02:07:33 +00:00
Server	refactor: move error explanation text to the manual (#11688)	2025-12-26 17:14:58 +00:00
Util	perf: ensure withTraceNodeBefore message is created lazily (#11893)	2026-01-04 20:38:39 +00:00
Widget
AddDecl.lean	chore: use backticks for sorry in diagnostic messages (#11608)	2025-12-15 14:30:21 +00:00
Attributes.lean	chore: fix spelling (#11531)	2025-12-06 13:54:27 +00:00
AuxRecursor.lean	perf: handle per-constructor noConfusion in toLCNF (#11566)	2025-12-10 09:03:55 +00:00
BuiltinDocAttr.lean
Class.lean
Compiler.lean
CoreM.lean	perf: remove obsolete old codegen workaround (#9311)	2025-12-12 20:51:34 +00:00
Data.lean
Declaration.lean
DeclarationRange.lean
DefEqAttrib.lean
DocString.lean
Elab.lean	feat: add #import_path, assert_not_exists, assert_not_imported commands (#11726)	2025-12-19 04:09:33 +00:00
EnvExtension.lean	fix: avoid panic in TagDeclarationExtension.tag on partial elaboration (#11882)	2026-01-05 00:36:58 +00:00
Environment.lean	perf: avoid kernel env block in realizeConst (#11617)	2025-12-12 11:20:20 +00:00
ErrorExplanation.lean	refactor: move error explanation text to the manual (#11688)	2025-12-26 17:14:58 +00:00
Exception.lean	refactor: move error explanation text to the manual (#11688)	2025-12-26 17:14:58 +00:00
Expr.lean	fix: nonstandard instances in grind and simp +arith (#11758)	2025-12-21 17:56:49 +00:00
ExtraModUses.lean	feat: shake: make Mathlib-ready (#11496)	2025-12-05 09:37:58 +00:00
HeadIndex.lean
Hygiene.lean	chore: do not set unused Option.Decl.group (#11307)	2025-11-21 16:44:38 +00:00
IdentifierSuggestion.lean	chore: remove NameMapExtension abbreviation (#11632)	2025-12-12 12:34:53 +00:00
ImportingFlag.lean
InternalExceptionId.lean
KeyedDeclsAttribute.lean
LabelAttribute.lean
Level.lean	fix: move the monad argument for ForIn, ForIn', and ForM (#10204)	2025-11-25 12:20:37 +00:00
LibrarySuggestions.lean	fix: make library suggestions available in module files (#11373)	2025-11-26 05:39:27 +00:00
Linter.lean	feat: lint coercions that are deprecated or banned in core (#11511)	2025-12-12 15:09:13 +00:00
LoadDynlib.lean	refactor: use String.Slice in String.take and variants (#11180)	2025-11-18 16:13:48 +00:00
LocalContext.lean	feat: support for incrementally processing hypotheses in grind (#11787)	2025-12-24 02:50:22 +00:00
Log.lean	refactor: move error explanation text to the manual (#11688)	2025-12-26 17:14:58 +00:00
Message.lean	fix: teach Exception.isRuntime to detect nested errors (#11490)	2025-12-10 10:19:33 +00:00
Meta.lean	feat: add SymM monad (#11788)	2025-12-24 04:05:14 +00:00
MetavarContext.lean
Modifiers.lean
MonadEnv.lean	feat: grind support for .ctorIdx (#11652)	2025-12-13 13:32:19 +00:00
Namespace.lean
Parser.lean
ParserCompiler.lean	doc: correct typos in documentation and comments (#11465)	2025-12-02 06:38:05 +00:00
PrettyPrinter.lean	chore: do not set unused Option.Decl.group (#11307)	2025-11-21 16:44:38 +00:00
PrivateName.lean
ProjFns.lean	chore: delete obsolete C++ file (#11561)	2025-12-09 15:47:54 +00:00
ReducibilityAttrs.lean	feat: allow setting reducibilityCoreExt in async contexts (#11301)	2025-11-21 09:23:14 +00:00
Replay.lean
ReservedNameAction.lean
ResolveName.lean
Runtime.lean
ScopedEnvExtension.lean
Server.lean
Setup.lean	fix: symbol clashes between packages (#11082)	2025-11-19 02:24:44 +00:00
Shell.lean	refactor: port shell option processing to Lean (v2) (#11434)	2025-12-02 17:41:51 +00:00
Structure.lean
SubExpr.lean	refactor: use String.split instead of String.splitOn or String.splitToList (#11250)	2025-11-19 09:35:19 +00:00
Syntax.lean	fix: move the monad argument for ForIn, ForIn', and ForM (#10204)	2025-11-25 12:20:37 +00:00
ToExpr.lean
ToLevel.lean
Util.lean
Widget.lean