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@github-actions github-actions released this 01 Nov 02:36
· 286 commits to master since this release
v4.13.0
6d22e0e

Full Changelog: v4.12.0...v4.13.0

Language features, tactics, and metaprograms

  • structure command

    • #5511 allows structure parents to be type synonyms.
    • #5531 allows default values for structure fields to be noncomputable.

  • rfl and apply_rfl tactics

  • unfold tactic

    • #4834 let unfold do zeta-delta reduction of local definitions, incorporating functionality of the Mathlib unfold_let tactic.

  • omega tactic

  • simp tactic

    • #5479 lets simp apply rules with higher-order patterns.

  • induction tactic

    • #5494 fixes induction’s "pre-tactic" block to always be indented, avoiding unintended uses of it.

  • ac_nf tactic

    • #5524 adds ac_nf, a counterpart to ac_rfl, for normalizing expressions with respect to associativity and commutativity. Tests it with BitVec expressions.

  • bv_decide

    • #5211 makes extractLsb' the primitive bv_decide understands, rather than extractLsb (@alexkeizer)
    • #5365 adds bv_decide diagnoses.
    • #5375 adds bv_decide normalization rules for ofBool (a.getLsbD i) and ofBool a[i] (@alexkeizer)
    • #5423 enhances the rewriting rules of bv_decide
    • #5433 presents the bv_decide counterexample at the API
    • #5484 handles BitVec.ofNat with Nat fvars in bv_decide
    • #5506, #5507 add bv_normalize rules.
    • #5568 generalize the bv_normalize pipeline to support more general preprocessing passes
    • #5573 gets bv_normalize up-to-date with the current BitVec rewrites
    • Cleanups: #5408, #5493, #5578

  • Elaboration improvements

    • #5266 preserve order of overapplied arguments in elab_as_elim procedure.
    • #5510 generalizes elab_as_elim to allow arbitrary motive applications.
    • #5283, #5512 refine how named arguments suppress explicit arguments. Breaking change: some previously omitted explicit arguments may need explicit _ arguments now.
    • #5376 modifies projection instance binder info for instances, making parameters that are instance implicit in the type be implicit.
    • #5402 localizes universe metavariable errors to let bindings and fun binders if possible. Makes "cannot synthesize metavariable" errors take precedence over unsolved universe level errors.
    • #5419 must not reduce ite in the discriminant of match-expression when reducibility setting is .reducible
    • #5474 have autoparams report parameter/field on failure
    • #5530 makes automatic instance names about types with hygienic names be hygienic.

  • Deriving handlers

    • #5432 makes Repr deriving instance handle explicit type parameters

  • Functional induction

    • #5364 adds more equalities in context, more careful cleanup.

  • Linters

    • #5335 fixes the unused variables linter complaining about match/tactic combinations
    • #5337 fixes the unused variables linter complaining about some wildcard patterns

  • Other fixes

    • #4768 fixes a parse error when .. appears with a . on the next line

  • Metaprogramming

    • #3090 handles level parameters in Meta.evalExpr (@eric-wieser)
    • #5401 instance for Inhabited (TacticM α) (@alexkeizer)
    • #5412 expose Kernel.check for debugging purposes
    • #5556 improves the "invalid projection" type inference error in inferType.
    • #5587 allows MVarId.assertHypotheses to set BinderInfo and LocalDeclKind.
    • #5588 adds MVarId.tryClearMany', a variant of MVarId.tryClearMany.

Language server, widgets, and IDE extensions

  • #5205 decreases the latency of auto-completion in tactic blocks.
  • #5237 fixes symbol occurrence highlighting in VS Code not highlighting occurrences when moving the text cursor into the identifier from the right.
  • #5257 fixes several instances of incorrect auto-completions being reported.
  • #5299 allows auto-completion to report completions for global identifiers when the elaborator fails to provide context-specific auto-completions.
  • #5312 fixes the server breaking when changing whitespace after the module header.
  • #5322 fixes several instances of auto-completion reporting non-existent namespaces.
  • #5428 makes sure to always report some recent file range as progress when waiting for elaboration.

Pretty printing

  • #4979 make pretty printer escape identifiers that are tokens.
  • #5389 makes formatter use the current token table.
  • #5513 use breakable instead of unbreakable whitespace when formatting tokens.

Library

  • #5222 reduces allocations in Json.compress.

  • #5231 upstreams Zero and NeZero

  • #5292 refactors Lean.Elab.Deriving.FromToJson (@arthur-adjedj)

  • #5415 implements Repr Empty (@TomasPuverle)

  • #5421 implements To/FromJSON Empty (@TomasPuverle)

  • Logic

    • #5263 allows simplifying dite_not/decide_not with only Decidable (¬p).
    • #5268 fixes binders on ite_eq_left_iff
    • #5284 turns off Inhabited (Sum α β) instances
    • #5355 adds simp lemmas for LawfulBEq
    • #5374 add Nonempty instances for products, allowing more partial functions to elaborate successfully
    • #5447 updates Pi instance names
    • #5454 makes some instance arguments implicit
    • #5456 adds heq_comm
    • #5529 moves @[simp] from exists_prop' to exists_prop

  • Bool

    • #5228 fills gaps in Bool lemmas
    • #5332 adds notation ^^ for Bool.xor
    • #5351 removes _root_.and (and or/not/xor) and instead exports/uses Bool.and (etc.).

  • BitVec

  • List

    • #5242 improve naming for List.mergeSort lemmas
    • #5302 provide mergeSort comparator autoParam
    • #5373 fix name of List.length_mergeSort
    • #5377 upstream map_mergeSort
    • #5378 modify signature of lemmas about mergeSort
    • #5245 avoid importing List.Basic without List.Impl
    • #5260 review of List API
    • #5264 review of List API
    • #5269 remove HashMap's duplicated Pairwise and Sublist
    • #5271 remove @[simp] from List.head_mem and similar
    • #5273 lemmas about List.attach
    • #5275 reverse direction of List.tail_map
    • #5277 more List.attach lemmas
    • #5285 List.count lemmas
    • #5287 use boolean predicates in List.filter
    • #5289 List.mem_ite_nil_left and analogues
    • #5293 cleanup of List.findIdx / List.take lemmas
    • #5294 switch primes on List.getElem_take
    • #5300 more List.findIdx theorems
    • #5310 fix List.all/any lemmas
    • #5311 fix List.countP lemmas
    • #5316 List.tail lemma
    • #5331 fix implicitness of List.getElem_mem
    • #5350 List.replicate lemmas
    • #5352 List.attachWith lemmas
    • #5353 List.head_mem_head?
    • #5360 lemmas about List.tail
    • #5391 review of List.erase / List.find lemmas
    • #5392 List.fold / attach lemmas
    • #5393 List.fold relators
    • #5394 lemmas about List.maximum?
    • #5403 theorems about List.toArray
    • #5405 reverse direction of List.set_map
    • #5448 add lemmas about List.IsPrefix (@Command-Master)
    • #5460 missing List.set_replicate_self
    • #5518 rename List.maximum? to max?
    • #5519 upstream List.fold lemmas
    • #5520 restore @[simp] on List.getElem_mem etc.
    • #5521 List simp fixes
    • #5550 List.unattach and simp lemmas
    • #5594 induction-friendly List.min?_cons

  • Array

    • #5246 cleanup imports of Array.Lemmas
    • #5255 split Init.Data.Array.Lemmas for better bootstrapping
    • #5288 rename Array.data to Array.toList
    • #5303 cleanup of List.getElem_append variants
    • #5304 Array.not_mem_empty
    • #5400 reorganization in Array/Basic
    • #5420 make Array functions either semireducible or use structural recursion
    • #5422 refactor DecidableEq (Array α)
    • #5452 refactor of Array
    • #5458 cleanup of Array docstrings after refactor
    • #5461 restore @[simp] on Array.swapAt!_def
    • #5465 improve Array GetElem lemmas
    • #5466 Array.foldX lemmas
    • #5472 @[simp] lemmas about List.toArray
    • #5485 reverse simp direction for toArray_concat
    • #5514 Array.eraseReps
    • #5515 upstream Array.qsortOrd
    • #5516 upstream Subarray.empty
    • #5526 fix name of Array.length_toList
    • #5527 reduce use of deprecated lemmas in Array
    • #5534 cleanup of Array GetElem lemmas
    • #5536 fix Array.modify lemmas
    • #5551 upstream Array.flatten lemmas
    • #5552 switch obvious cases of array "bang"[]! indexing to rely on hypothesis (@TomasPuverle)
    • #5577 add missing simp to Array.size_feraseIdx
    • #5586 Array/Option.unattach

  • Option

    • #5272 remove @[simp] from Option.pmap/pbind and add simp lemmas
    • #5307 restoring Option simp confluence
    • #5354 remove @[simp] from Option.bind_map
    • #5532 Option.attach
    • #5539 fix explicitness of Option.mem_toList

  • Nat

    • #5241 add @[simp] to Nat.add_eq_zero_iff
    • #5261 Nat bitwise lemmas
    • #5262 Nat.testBit_add_one should not be a global simp lemma
    • #5267 protect some Nat bitwise theorems
    • #5305 rename Nat bitwise lemmas
    • #5306 add Nat.self_sub_mod lemma
    • #5503 restore @[simp] to upstreamed Nat.lt_off_iff

  • Int

    • #5301 rename Int.div/mod to Int.tdiv/tmod
    • #5320 add ediv_nonneg_of_nonpos_of_nonpos to DivModLemmas (@sakehl)

  • Fin

    • #5250 missing lemma about Fin.ofNat'
    • #5356 Fin.ofNat' uses NeZero
    • #5379 remove some @[simp]s from Fin lemmas
    • #5380 missing Fin @[simp] lemmas

  • HashMap

    • #5244 (DHashMap|HashMap|HashSet).(getKey?|getKey|getKey!|getKeyD)
    • #5362 remove the last use of Lean.(HashSet|HashMap)
    • #5369 HashSet.ofArray
    • #5370 HashSet.partition
    • #5581 Singleton/Insert/Union instances for HashMap/Set
    • #5582 HashSet.all/any
    • #5590 adding Insert/Singleton/Union instances for HashMap/Set.Raw
    • #5591 HashSet.Raw.all/any

  • Monads

    • #5463 upstream some monad lemmas
    • #5464 adjust simp attributes on monad lemmas
    • #5522 more monadic simp lemmas

  • Simp lemma cleanup

    • #5251 remove redundant simp annotations
    • #5253 remove Int simp lemmas that can't fire
    • #5254 variables appearing on both sides of an iff should be implicit
    • #5381 cleaning up redundant simp lemmas

Compiler, runtime, and FFI

  • #4685 fixes a typo in the C run_new_frontend signature
  • #4729 has IR checker suggest using noncomputable
  • #5143 adds a shared library for Lake
  • #5437 removes (syntactically) duplicate imports (@euprunin)
  • #5462 updates src/lake/lakefile.toml to the adjusted Lake build process
  • #5541 removes new shared libs before build to better support Windows
  • #5558 make lean.h compile with MSVC (@kant2002)
  • #5564 removes non-conforming size-0 arrays (@eric-wieser)

Lake

  • Reservoir build cache. Lake will now attempt to fetch a pre-built copy of the package from Reservoir before building it. This is only enabled for packages in the leanprover or leanprover-community organizations on versions indexed by Reservoir. Users can force Lake to build packages from the source by passing --no-cache on the CLI or by setting the LAKE_NO_CACHE environment variable to true. #5486, #5572, #5583, #5600, #5641, #5642.

  • #5504 lake new and lake init now produce TOML configurations by default.

  • #5878 fixes a serious issue where Lake would delete path dependencies when attempting to cleanup a dependency required with an incorrect name.

  • Breaking changes

    • #5641 A Lake build of target within a package will no longer build a package's dependencies package-level extra target dependencies. At the technical level, a package's extraDep facet no longer transitively builds its dependencies’ extraDep facets (which include their extraDepTargets).

Documentation fixes

Changes to CI

  • #5343 allows addition of release-ci label via comment (@thorimur)
  • #5344 sets check level correctly during workflow (@thorimur)
  • #5444 Mathlib's lean-pr-testing-NNNN branches should use Batteries' lean-pr-testing-NNNN branches
  • #5489 commit lake-manifest.json when updating lean-pr-testing branches
  • #5490 use separate secrets for commenting and branching in pr-release.yml

Contributors

eric-wieser, tobiasgrosser, and 14 other contributors
Assets 16
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