diff options
Diffstat (limited to 'CHANGES')
| -rw-r--r-- | CHANGES | 559 |
1 files changed, 547 insertions, 12 deletions
@@ -1,3 +1,538 @@ +Changes from 8.8.1 to 8.8.2 +=========================== + +Documentation + +- A PDF version of the reference manual is available once again. + +Tools + +- The coq-makefile targets `print-pretty-timed`, `print-pretty-timed-diff`, + and `print-pretty-single-time-diff` now correctly label the "before" and + "after" columns, rather than swapping them. + +Kernel + +- The kernel does not tolerate capture of global universes by + polymorphic universe binders, fixing a soundness break (triggered + only through custom plugins) + +Windows installer + +- The Windows installer now includes many more external packages that can be +individually selected for installation. + +Many other bug fixes and lots of documentation improvements (for details, +see the 8.8.2 milestone at https://github.com/coq/coq/milestone/15?closed=1). + +Changes from 8.8.0 to 8.8.1 +=========================== + +Kernel + +- Fix a critical bug with cofixpoints and vm_compute/native_compute (#7333). +- Fix a critical bug with modules and algebraic universes (#7695) +- Fix a critical bug with inlining of polymorphic constants (#7615). +- Fix a critical bug with universe polymorphism and vm_compute (#7723). Was + present since 8.5. + +Notations + +- Fixed unexpected collision between only-parsing and only-printing + notations (issue #7462). + +Windows installer + +- The Windows installer now includes external packages Ltac2 and Equations + (it included the Bignums package since 8.8+beta1). + +Many other bug fixes, documentation improvements (including fixes of +regressions due to the Sphinx migration), and user message improvements +(for details, see the 8.8.1 milestone at +https://github.com/coq/coq/milestone/13?closed=1). + +Changes from 8.8+beta1 to 8.8.0 +=============================== + +Tools + +- Asynchronous proof delegation policy was fixed. Since version 8.7 + Coq was ignoring previous runs and the -async-proofs-delegation-threshold + option did not have the expected behavior. + +Tactic language + +- The undocumented "nameless" forms `fix N`, `cofix N` have been + deprecated; please use `fix/cofix ident N` to explicitely name + hypothesis to be introduced. + +Documentation + +- The reference manual is now fully ported to Sphinx. + +Other small deprecations and bug fixes. + +Changes from 8.7.2 to 8.8+beta1 +=============================== + +Kernel + +- Support for template polymorphism for definitions was removed. May trigger + more "universe inconsistency" errors in rare occasions. +- Fixpoints are no longer allowed on non-recursive inductive types. + +Notations + +- Recursive notations with the recursive pattern repeating on the + right (e.g. "( x ; .. ; y ; z )") now supported. +- Notations with a specific level for the leftmost nonterminal, + when printing-only, are supported. +- Notations can now refer to the syntactic category of patterns (as in + "fun 'pat =>" or "match p with pat => ... end"). Two variants are + available, depending on whether a single variable is considered as a + pattern or not. +- Recursive notations now support ".." patterns with several + occurrences of the recursive term or binder, possibly mixing terms + and binders, possibly in reverse left-to-right order. +- "Locate" now working also on notations of the form "x + y" (rather + than "_ + _"). + +Specification language + +- When printing clauses of a "match", clauses with same right-hand + side are factorized and the last most factorized clause with no + variables, if it exists, is turned into a default clause. + Use "Unset Printing Allow Default Clause" do deactivate printing + of a default clause. + Use "Unset Printing Factorizable Match Patterns" to deactivate + factorization of clauses with same right-hand side. + +Tactics + +- On Linux, "native_compute" calls can be profiled using the "perf" + utility. The command "Set NativeCompute Profiling" enables + profiling, and "Set NativeCompute Profile Filename" customizes + the profile filename. +- The tactic "omega" is now aware of the bodies of context variables + such as "x := 5 : Z" (see BZ#148). This could be disabled via + Unset Omega UseLocalDefs. +- The tactic "romega" is also aware now of the bodies of context variables. +- The tactic "zify" resp. "omega with N" is now aware of N.pred. +- Tactic "decide equality" now able to manage constructors which + contain proofs. +- Added tactics reset ltac profile, show ltac profile (and variants) +- Added tactics restart_timer, finish_timing, and time_constr as an + experimental way of timing Ltac's evaluation phase +- Added tactic optimize_heap, analogous to the Vernacular Optimize + Heap, which performs a major garbage collection and heap compaction + in the OCaml run-time system. +- The tactics "dtauto", "dintuition", "firstorder" now handle inductive types + with let bindings in the parameters. +- The tactic "dtauto" now handles some inductives such as + "@sigT A (fun _ => B)" as non-dependent conjunctions. +- A bug fixed in "rewrite H in *" and "rewrite H in * |-" may cause a + few rare incompatibilities (it was unintendedly recursively + rewriting in the side conditions generated by H). +- Added tactics "assert_succeeds tac" and "assert_fails tac" to ensure + properties of the executation of a tactic without keeping the effect + of the execution. +- `vm_compute` now supports existential variables. +- Calls to `shelve` and `give_up` within calls to tactic `refine` now working. +- Deprecated tactic `appcontext` was removed. + +Focusing + +- Focusing bracket `{` now supports single-numbered goal selector, + e.g. `2: {` will focus on the second sub-goal. As usual, unfocus + with `}` once the sub-goal is fully solved. + The `Focus` and `Unfocus` commands are now deprecated. + +Vernacular Commands + +- Proofs ending in "Qed exporting ident, .., ident" are not supported + anymore. Constants generated during `abstract` are kept private to the + local environment. +- The deprecated Coercion Local, Open Local Scope, Notation Local syntax + was removed. Use Local as a prefix instead. +- For the Extraction Language command, "OCaml" is spelled correctly. + The older "Ocaml" is still accepted, but deprecated. +- Using “Require” inside a section is deprecated. +- An experimental command "Show Extraction" allows to extract the content + of the current ongoing proof (grant wish #4129). +- Coercion now accepts the type of its argument to be "Prop" or "Type". +- The "Export" modifier can now be used when setting and unsetting options, and + will result in performing the same change when the module corresponding the + command is imported. +- The `Axiom` command does not automatically declare axioms as instances when + their type is a class. Previous behavior can be restored using `Set + Typeclasses Axioms Are Instances`. + +Universes + +- Qualified naming of global universes now works like other namespaced + objects (e.g. constants), with a separate namespace, inside and across + module and library boundaries. Global universe names introduced in an + inductive / constant / Let declaration get qualified with the name of + the declaration. +- Universe cumulativity for inductive types is now specified as a + variance for each polymorphic universe. See the reference manual for + more information. +- Inference of universe constraints with cumulative inductive types + produces more general constraints. Unsetting new option Cumulativity + Weak Constraints produces even more general constraints (but may + produce too many universes to be practical). +- Fix #5726: Notations that start with `Type` now support universe instances + with `@{u}`. +- `with Definition` now understands universe declarations + (like `@{u| Set < u}`). + +Tools + +- Coq can now be run with the option -mangle-names to change the auto-generated + name scheme. This is intended to function as a linter for developments that + want to be robust to changes in auto-generated names. This feature is experimental, + and may change or disappear without warning. +- GeoProof support was removed. + +Checker + +- The checker now accepts filenames in addition to logical paths. + +CoqIDE + +- Find and Replace All report the number of occurrences found; Find indicates + when it wraps. + +coqdep + +- Learned to read -I, -Q, -R and filenames from _CoqProject files. + This is used by coq_makefile when generating dependencies for .v + files (but not other files). + +Documentation + +- The Coq FAQ, formerly located at https://coq.inria.fr/faq, has been + moved to the GitHub wiki section of this repository; the main entry + page is https://github.com/coq/coq/wiki/The-Coq-FAQ. +- Documentation: a large community effort resulted in the migration + of the reference manual to the Sphinx documentation tool. The result + is partially integrated in this version. + +Standard Library + +- New libraries Coq.Init.Decimal, Coq.Numbers.DecimalFacts, + Coq.Numbers.DecimalNat, Coq.Numbers.DecimalPos, + Coq.Numbers.DecimalN, Coq.Numbers.DecimalZ, + Coq.Numbers.DecimalString providing a type of decimal numbers, some + facts about them, and conversions between decimal numbers and nat, + positive, N, Z, and string. +- Added [Coq.Strings.String.concat] to concatenate a list of strings + inserting a separator between each item +- Notation `'` for Zpos in QArith was removed. + +- Some deprecated aliases are now emitting warnings when used. + +Compatibility support + +- Support for compatibility with versions before 8.6 was dropped. + +Options + +- The following deprecated options have been removed: + + + `Refolding Reduction` + + `Standard Proposition Elimination` + + `Dependent Propositions Elimination` + + `Discriminate Introduction` + + `Shrink Abstract` + + `Tactic Pattern Unification` + + `Intuition Iff Unfolding` + + `Injection L2R Pattern Order` + + `Record Elimination Schemes` + + `Match Strict` + + `Tactic Compat Context` + + `Typeclasses Legacy Resolution` + + `Typeclasses Module Eta` + + `Typeclass Resolution After Apply` + +Changes from 8.7.1 to 8.7.2 +=========================== + +Fixed a critical bug in the VM handling of universes (#6677). This bug +affected all releases since 8.5. + +Improved support for building with OCaml 4.06.0 and external num package. + +Many other bug fixes, documentation improvements, and user +message improvements (for details, see the 8.7.2 milestone at +https://github.com/coq/coq/milestone/11?closed=1). + +Changes from 8.7.0 to 8.7.1 +=========================== + +Compatibility with OCaml 4.06.0. + +Many bug fixes, documentation improvements, and user message improvements (for +details see the 8.7.1 milestone at https://github.com/coq/coq/milestone/10?closed=1). + +Changes from 8.7+beta2 to 8.7.0 +=============================== + +OCaml + +- Users can pass specific flags to the OCaml optimizing compiler by + -using the flambda-opts configure-time option. + + Beware that compiling Coq with a flambda-enabled compiler is + experimental and may require large amounts of RAM and CPU, see + INSTALL for more details. + +Changes from 8.7+beta1 to 8.7+beta2 +=================================== + +Tools + +- In CoqIDE, the "Compile Buffer" command takes account of flags in + _CoqProject or other project file. + +Improvements around some error messages. + +Many bug fixes including two important ones: + +- BZ#5730: CoqIDE becomes unresponsive on file open. +- coq_makefile: make sure compile flags for Coq and coq_makefile are in sync + (in particular, make sure the `-safe-string` option is used to compile plugins). + +Changes from 8.6.1 to 8.7+beta1 +=============================== + +Tactics + +- New tactic "extensionality in H" which applies (possibly dependent) + functional extensionality in H supposed to be a quantified equality + until giving a bare equality. +- New tactic "inversion_sigma" which turns equalities of dependent + pairs (e.g., "existT P x p = existT P y q", frequently left over by + "inversion" on a dependent type family) into pairs of equalities + (e.g., a hypothesis "H : x = y" and a hypothesis of type "rew H in p + = q"); these hypotheses can subsequently be simplified using + "subst", without ever invoking any kind of axiom asserting + uniqueness of identity proofs. If you want to explicitly specify the + hypothesis to be inverted, or name the generated hypotheses, you can + invoke "induction H as [H1 H2] using eq_sigT_rect". The tactic also + works for "sig", "sigT2", and "sig2", and there are similar + "eq_sig*_rect" induction lemmas. +- Tactic "specialize with ..." now accepts any partial bindings. + Missing bindings are either solved by unification or left quantified + in the hypothesis. +- New representation of terms that statically ensure stability by + evar-expansion. This has several consequences. + * In terms of performance, this adds a cost to every term destructuration, + but at the same time most eager evar normalizations were removed, which + couterbalances this drawback and even sometimes outperforms the old + implementation. For instance, many operations that would require O(n) + normalization of the term are now O(1) in tactics. YMMV. + * This triggers small changes in unification, which was not evar-insensitive. + Most notably, the new implementation recognizes Miller patterns that were + missed before because of a missing normalization step. Hopefully this should + be fairly uncommon. +- Tactic "auto with real" can now discharge comparisons of literals. +- The types of variables in patterns of "match" are now + beta-iota-reduced after type-checking. This has an impact on the + type of the variables that the tactic "refine" introduces in the + context, producing types a priori closer to the expectations. +- In "Tactic Notation" or "TACTIC EXTEND", entry "constr_with_bindings" + now uses type classes and rejects terms with unresolved holes, like + entry "constr" does. To get the former behavior use + "open_constr_with_bindings" (possible source of incompatibility). +- New e-variants eassert, eenough, epose proof, eset, eremember, epose + which behave like the corresponding variants with no "e" but turn + unresolved implicit arguments into existential variables, on the + shelf, rather than failing. +- Tactic injection has become more powerful (closes BZ#4890) and its + documentation has been updated. +- New variants of the `first` and `solve` tacticals that do not rely + on parsing rules, meant to define tactic notations. +- Added support for side effects hooks in `cbv`, `cbn` and `simpl`. + The side effects are provided via a plugin: + https://github.com/herbelin/reduction-effects/ +- It is now possible to take hint database names as parameters in a + Ltac definition or a Tactic Notation. +- New option `Set Ltac Batch Debug` on top of `Set Ltac Debug` for + non-interactive Ltac debug output. + +Gallina + +- Now supporting all kinds of binders, including 'pat, in syntax of record fields. + +Vernacular Commands + +- Goals context can be printed in a more compact way when `Set + Printing Compact Contexts` is activated. +- Unfocused goals can be printed with the `Set Printing Unfocused` + option. +- `Print` now shows the types of let-bindings. +- The compatibility options for printing primitive projections + (`Set Printing Primitive Projection Parameters` and + `Set Printing Primitive Projection Compatibility`) are now off by default. +- Possibility to unset the printing of notations in a more fine grained + fashion than `Unset Printing Notations` is provided without any + user-syntax. The goal is that someone creates a plugin to experiment + such a user-syntax, to be later integrated in Coq when stabilized. +- `About` now tells if a reference is a coercion. +- The deprecated `Save` vernacular and its form `Save Theorem id` to + close proofs have been removed from the syntax. Please use `Qed`. +- `Search` now sorts results by relevance (the relevance metric is a + weighted sum of number of distinct symbols and size of the term). + +Standard Library + +- New file PropExtensionality.v to explicitly work in the axiomatic + context of propositional extensionality. +- New file SetoidChoice.v axiomatically providing choice over setoids, + and, consequently, choice of representatives in equivalence classes. + Various proof-theoretic characterizations of choice over setoids in + file ChoiceFacts.v. +- New lemmas about iff and about orders on positive and Z. +- New lemmas on powerRZ. +- Strengthened statement of JMeq_eq_dep (closes BZ#4912). +- The BigN, BigZ, BigZ libraries are no longer part of the Coq standard + library, they are now provided by a separate repository + https://github.com/coq/bignums + The split has been done just after the Int31 library. + +- IZR (Reals) has been changed to produce a compact representation of + integers. As a consequence, IZR is no longer convertible to INR and + lemmas such as INR_IZR_INZ should be used instead. +- Real constants are now represented using IZR rather than R0 and R1; + this might cause rewriting rules to fail to apply to constants. +- Added new notation {x & P} for sigT (without a type for x) + +Plugins + +- The Ssreflect plugin is now distributed with Coq. Its documentation has + been integrated as a chapter of the reference manual. This chapter is + work in progress so feedback is welcome. +- The mathematical proof language (also known as declarative mode) was removed. +- A new command Extraction TestCompile has been introduced, not meant + for the general user but instead for Coq's test-suite. +- The extraction plugin is no longer loaded by default. It must be + explicitly loaded with [Require Extraction], which is backwards + compatible. +- The functional induction plugin (which provides the [Function] + vernacular) is no longer loaded by default. It must be explicitly + loaded with [Require FunInd], which is backwards compatible. + + +Dependencies + +- Support for camlp4 has been removed. + +Tools + +- coq_makefile was completely redesigned to improve its maintainability and + the extensibility of generated Makefiles, and to make _CoqProject files + more palatable to IDEs. Overview: + * _CoqProject files contain only Coq specific data (i.e. the list of + files, -R options, ...) + * coq_makefile translates _CoqProject to Makefile.conf and copies in the + desired location a standard Makefile (that reads Makefile.conf) + * Makefile extensions can be implemented in a Makefile.local file (read + by the main Makefile) by installing a hook in the extension points + provided by the standard Makefile + The current version contains code for retro compatibility that prints + warnings when a deprecated feature is used. Please upgrade your _CoqProject + accordingly. + * Additionally, coq_makefile-made Makefiles now support experimental timing + targets `pretty-timed`, `pretty-timed-before`, `pretty-timed-after`, + `print-pretty-timed-diff`, `print-pretty-single-time-diff`, + `all.timing.diff`, and the variable `TIMING=1` (or `TIMING=before` or + `TIMING=after`); see the documentation for more details. + +Build Infrastructure + +- Note that 'make world' does not build the bytecode binaries anymore. + For that, you can use 'make byte' (and 'make install-byte' afterwards). + Warning: native and byte compilations should *not* be mixed in the same + instance of 'make -j', otherwise both ocamlc and ocamlopt might race for + access to the same .cmi files. In short, use "make -j && make -j byte" + instead of "make -j world byte". + +Universes + +- Cumulative inductive types. see prefixes "Cumulative", "NonCumulative" + for inductive definitions and the option "Set Polymorphic Inductive Cumulativity" + in the reference manual. +- New syntax `foo@{_}` to instantiate a polymorphic definition with + anonymous universes (can also be used with `Type`). + +XML Protocol and internal changes + +See dev/doc/changes.txt + +Many bugfixes including BZ#1859, BZ#2884, BZ#3613, BZ#3943, BZ#3994, +BZ#4250, BZ#4709, BZ#4720, BZ#4824, BZ#4844, BZ#4911, BZ#5026, BZ#5233, +BZ#5275, BZ#5315, BZ#5336, BZ#5360, BZ#5390, BZ#5414, BZ#5417, BZ#5420, +BZ#5439, BZ#5449, BZ#5475, BZ#5476, BZ#5482, BZ#5501, BZ#5507, BZ#5520, +BZ#5523, BZ#5524, BZ#5553, BZ#5577, BZ#5578, BZ#5589, BZ#5597, BZ#5598, +BZ#5607, BZ#5618, BZ#5619, BZ#5620, BZ#5641, BZ#5648, BZ#5651, BZ#5671. + +Many bugfixes on OS X and Windows (now the test-suite passes on these +platforms too). + +Many optimizations. + +Many documentation improvements. + +Changes from 8.6 to 8.6.1 +========================= + +- Fix #5380: Default colors for CoqIDE are actually applied. +- Fix plugin warnings +- Document named evars (including Show ident) +- Fix Bug #5574, document function scope +- Adding a test case as requested in bug 5205. +- Fix Bug #5568, no dup notation warnings on repeated module imports +- Fix documentation of Typeclasses eauto := +- Refactor documentation of records. +- Protecting from warnings while compiling 8.6 +- Fixing an inconsistency between configure and configure.ml +- Add test-suite checks for coqchk with constraints +- Fix bug #5019 (looping zify on dependent types) +- Fix bug 5550: "typeclasses eauto with" does not work with section variables. +- Bug 5546, qualify datatype constructors when needed in Show Match +- Bug #5535, test for Show with -emacs +- Fix bug #5486, don't reverse ids in tuples +- Fixing #5522 (anomaly with free vars of pat) +- Fix bug #5526, don't check for nonlinearity in notation if printing only +- Fix bug #5255 +- Fix bug #3659: -time should understand multibyte encodings. +- FIx bug #5300: Anomaly: Uncaught exception Not_found" in "Print Assumptions". +- Fix outdated description in RefMan. +- Repairing `Set Rewriting Schemes` +- Fixing #5487 (v8.5 regression on ltac-matching expressions with evars). +- Fix description of command-line arguments for Add (Rec) LoadPath +- Fix bug #5377: @? patterns broken. +- add XML protocol doc +- Fix anomaly when doing [all:Check _.] during a proof. +- Correction of bug #4306 +- Fix #5435: [Eval native_compute in] raises anomaly. +- Instances should obey universe binders even when defined by tactics. +- Intern names bound in match patterns +- funind: Ignore missing info for current function +- Do not typecheck twice the type of opaque constants. +- show unused intro pattern warning +- [future] Be eager when "chaining" already resolved future values. +- Opaque side effects +- Fix #5132: coq_makefile generates incorrect install goal +- Run non-tactic comands without resilient_command +- Univs: fix bug #5365, generation of u+k <= v constraints +- make `emit' tail recursive +- Don't require printing-only notation to be productive +- Fix the way setoid_rewrite handles bindings. +- Fix for bug 5244 - set printing width ignored when given enough space +- Fix bug 4969, autoapply was not tagging shelved subgoals correctly + Changes from V8.6beta1 to V8.6 ============================== @@ -2116,7 +2651,7 @@ Tactics a registered setoid equality before starting to reduce in H. This is unlikely to break any script. Should this happen nonetheless, one can insert manually some "unfold ... in H" before rewriting. -- Fixed various bugs about (setoid) rewrite ... in ... (in particular #1101) +- Fixed various bugs about (setoid) rewrite ... in ... (in particular BZ#1101) - "rewrite ... in" now accepts a clause as place where to rewrite instead of juste a simple hypothesis name. For instance: rewrite H in H1,H2 |- * means rewrite H in H1; rewrite H in H2; rewrite H @@ -2693,11 +3228,11 @@ Incompatibilities Bugs - Improved localisation of errors in Syntactic Definitions -- Induction principle creation failure in presence of let-in fixed (#238) -- Inversion bugs fixed (#212 and #220) -- Omega bug related to Set fixed (#180) -- Type-checking inefficiency of nested destructuring let-in fixed (#216) -- Improved handling of let-in during holes resolution phase (#239) +- Induction principle creation failure in presence of let-in fixed (BZ#238) +- Inversion bugs fixed (BZ#212 and BZ#220) +- Omega bug related to Set fixed (BZ#180) +- Type-checking inefficiency of nested destructuring let-in fixed (BZ#216) +- Improved handling of let-in during holes resolution phase (BZ#239) Efficiency @@ -2710,18 +3245,18 @@ Changes from V7.3 to V7.3.1 Bug fixes - Corrupted Field tactic and Match Context tactic construction fixed - - Checking of names already existing in Assert added (PR#182) - - Invalid argument bug in Exact tactic solved (PR#183) - - Colliding bound names bug fixed (PR#202) - - Wrong non-recursivity test for Record fixed (PR#189) - - Out of memory/seg fault bug related to parametric inductive fixed (PR#195) + - Checking of names already existing in Assert added (BZ#182) + - Invalid argument bug in Exact tactic solved (BZ#183) + - Colliding bound names bug fixed (BZ#202) + - Wrong non-recursivity test for Record fixed (BZ#189) + - Out of memory/seg fault bug related to parametric inductive fixed (BZ#195) - Setoid_replace/Setoid_rewrite bug wrt "==" fixed Misc - Ocaml version >= 3.06 is needed to compile Coq from sources - Simplification of fresh names creation strategy for Assert, Pose and - LetTac (PR#192) + LetTac (BZ#192) Changes from V7.2 to V7.3 ========================= |