CHANGES.md 28.8 KB
Newer Older
1 2
# Changes

3 4 5 6 7 8
## 2018/10/19

* When generating OCaml code, include all record fields in record patterns,
  even when bound to a wildcard pattern. Thus, avoid triggering OCaml's
  warning 9.

9
## 2018/10/06
POTTIER Francois's avatar
POTTIER Francois committed
10

11
* Standard library: add `rev`, `flatten`, `append`.
12 13
  Add a link from the manual to `standard.mly` in the repository.

14 15
* Update the manual to explain how to use `dune` and `menhir` together.

POTTIER Francois's avatar
POTTIER Francois committed
16
* Install `.cmxs` files for menhirLib and menhirSdk.
17

18 19 20 21
* Remove all references to `Pervasives` in the generated OCaml code.
  These references were infrequent anyway,
  and `Pervasives` is about to be deprecated in OCaml 4.08, it seems.

22 23
* In `--interpret` mode, print `Ready!` once ready to accept input.

24 25 26 27 28 29
* At verbosity level `-lg 2`, for each nonterminal symbol `N`, display
  a sentence (composed of terminal symbols) of minimal length generated
  by `N`.

* When writing a `.cmly` file, open it in binary mode. This should
  eliminate the failure that was observed under Windows:
30 31 32 33 34
  `output_value: not a binary channel`. (Reported by Bryan Phelps.
  A fix was present in the `mingw` patches for Menhir.)

* Change the logic used in the root `Makefile` to deal with Unix and Windows
  in a uniform way. (Also inspired by the `mingw` patches for Menhir.)
35

36 37 38
* Coq back-end: add a few newlines in the generated file for readability.
  (Suggested by Bernhard Schommer.)

39 40 41
* Remove the trailing space at the end of every sentence in
  auto-generated `.messages` files. (Suggested by Xavier Leroy.)

42 43 44 45 46 47 48 49 50 51
## 2018/09/05

* When `--explain` is enabled, always create a fresh `.conflicts` file
  (wiping out any pre-existing file), even if there are in fact no conflicts.
  This should avoid confusion with outdated `.conflicts` files.

* Fix several bugs in the treatment of `--strict`. No `.conflicts` file
  was created when `--strict` and `--explain` were both enabled. Also,
  some warnings were not properly turned into errors by `--strict`.

52 53 54 55
## 2018/07/04

* Update the `man` page, which was woefully out of date.

56 57 58 59 60 61 62 63
## 2018/07/03

* New location keywords.
  `$loc` is sugar for the pair `($startpos, $endpos)`.
  `$loc(x)` is sugar for the pair `($startpos(x), $endpos(x))`.
  `$sloc` is sugar for the pair `($symbolstartpos, $endpos)`.
  (Contributed by Nicolás Ojeda Bär.)

64 65 66 67 68 69 70 71
## 2018/06/08

* Add two new parameterized nonterminal symbols, `endrule(X)` and `midrule(X)`,
  to the standard library. These symbols have been available since 2015/02/11
  under the names `anonymous(X)` and `embedded(X)`, but were not yet documented.
  `endrule(X)` and `midrule(X)` are now documented,
  while `anonymous(X)` and `embedded(X)` remain present but are deprecated.

72 73 74 75 76 77 78 79 80 81 82 83 84 85
## 2018/05/30

* In `--coq` mode, Menhir now produces references to `MenhirLib.Grammar`
  instead of just `Grammar`, and similarly for all modules in Menhir's support
  library.

* New command line option `--coq-lib-no-path` to suppress the above behavior
  and retain the previous (now-deprecated) behavior, that is, produce
  unqualified references the modules in Menhir's support library.

* New command line option `--coq-lib-path <path>` to indicate under what name
  (or path) the support library has been installed. Its default value is
  `MenhirLib`.

POTTIER Francois's avatar
POTTIER Francois committed
86 87 88
## 2018/05/23

* New commands `--infer-write-query`, `--infer-read-reply`, and
89 90 91 92 93 94 95 96 97 98 99 100
  `--infer-protocol-supported`. These commands remove the need for Menhir to
  invoke `ocamlc` and `ocamldep` behind the scenes, and make it easier to
  write correct build rules for Menhir projects. The command line options
  `--infer`, `--raw-depend` and `--depend` remain supported, but are no longer
  preferred. (Suggested by Fabrice Le Fessant.)

* Remove the warning that was issued when `%inline` was used but `--infer` was
  turned off. Most people should use a build system that knows how to enable
  OCaml type inference, such as `ocamlbuild` or `dune`.

* New HTML rendering of the manual, available both online and as part of
  Menhir's installation. (Implemented by Gabriel Scherer.)
POTTIER Francois's avatar
POTTIER Francois committed
101

102 103 104 105 106 107
## 2017/12/22

* Add a flag `--unused-precedence-levels` to suppress all warnings about
  useless `%left`, `%right`, `%nonassoc` and `%prec` declarations.
  (Suggested by Zachary Tatlock.)

POTTIER Francois's avatar
POTTIER Francois committed
108 109 110 111
## 2017/12/06

* Fix the termination test that takes place before parameterized symbols are
  expanded away. The previous test was both unsound (it would accept grammars
POTTIER Francois's avatar
POTTIER Francois committed
112 113 114
  whose expansion did not terminate) and incomplete (it would reject grammars
  whose expansion did terminate). The new test is believed to be sound and
  complete. (Thanks to Martin Bodin for prompting us to look into this issue.)
POTTIER Francois's avatar
POTTIER Francois committed
115

POTTIER Francois's avatar
POTTIER Francois committed
116 117 118 119 120
## 2017/11/12

* Documentation: clarify the fact that `%type` declarations should carry types
  whose meaning does not depend on the headers `%{ ... %}`.

121 122 123 124 125 126
## 2017/10/13

* Remove the OCaml version check at installation time, for greater simplicity,
  and because for some reason it did not work properly under Cygwin.
  (Reported by Andrew Appel.)

127 128 129 130 131 132 133
## 2017/09/26

* `Makefile` fix: when determining whether the suffix `.exe` should be used,
  one should test whether the OS is Windows,
  not whether the compiler is MSVC.
  (Suggested by Jonathan Protzenko.)

POTTIER Francois's avatar
POTTIER Francois committed
134 135 136 137 138 139 140 141
## 2017/07/12

* Include the LaTeX sources of the manual in the official `.tar.gz` archive.
  This should allow the manual to be included as part of the Debian package.

* Mention [Obelisk](https://github.com/Lelio-Brun/Obelisk),
  a pretty-printer for `.mly` files, in the manual.

142 143 144 145 146
## 2017/06/07

* Removed an undeclared dependency of MenhirSdk on Unix. (Reported and fixed
  by Frédéric Bour.)

POTTIER Francois's avatar
POTTIER Francois committed
147 148 149 150 151 152 153 154
## 2017/05/09

* Menhir now always places OCaml line number directives in the generated `.ml`
  file. (Until now, this was done only when `--infer` was off.) Thus, if a
  semantic action contains an `assert` statement, the file name and line
  number information carried by the `Assert_failure` exception should now be
  correct. (Reported by Helmut Brandl.)

POTTIER Francois's avatar
POTTIER Francois committed
155
## 2017/04/18
POTTIER Francois's avatar
POTTIER Francois committed
156

POTTIER Francois's avatar
POTTIER Francois committed
157 158
* Changed Menhir's license from QPL to GPLv2.
  MenhirLib remains under LGPLv2, with a linking exception.
POTTIER Francois's avatar
POTTIER Francois committed
159

POTTIER Francois's avatar
POTTIER Francois committed
160 161 162 163 164 165 166 167 168 169 170 171 172 173 174
* Moved the repository to
  [gitlab.inria.fr](https://gitlab.inria.fr/fpottier/menhir/).

* Introduced a new command line switch, `--cmly`, which causes Menhir to
  create a `.cmly` file, containing a description of the grammar and
  automaton. (Suggested by Frédéric Bour.)

* Introduced a new library, MenhirSdk, which allows reading a `.cmly` file.
  The purpose of this library is to allow external tools to take advantage
  of the work performed by Menhir's front-end. (Suggested by Frédéric Bour.)

* Introduced new syntax for attributes in a `.mly` file. Attributes are
  ignored by Menhir's back-ends, but are written to `.cmly` files, thus
  can be exploited by external tools via MenhirSdk. (Suggested by Frédéric Bour.)

175 176 177
* The definition of a `%public` nonterminal symbol can now be split into several
  parts within a single `.mly` file. (This used to be permitted only over
  multiple `.mly` files.) (Suggested by Frédéric Bour.)
178

POTTIER Francois's avatar
POTTIER Francois committed
179 180 181 182 183 184 185 186 187
* New functions in the incremental API:
  `shifts`, `acceptable`, `current_state_number`.

* New functions in the incremental API and inspection API:
  `top`, `pop`, `pop_many`, `get`, `equal`,
  `force_reduction`, `feed`, `input_needed`,
  `state_has_default_reduction`,
  `production_index`, `find_production`.
  (Suggested by Frédéric Bour.)
188

189 190 191 192 193
* New module `MenhirLib.ErrorReports`. This module is supposed to offer
  auxiliary functions that help produce good syntax error messages.
  This module does not yet contain much functionality and is expected
  to evolve in the future.

194 195 196 197
* Incompatible change in the incremental API: the type `env` becomes `'a env`.

* Incompatible change in the incremental API: the function
  `has_default_reduction` is renamed `env_has_default_reduction`.
198

199 200 201 202 203
* The type `stack` and the function `stack` in the incremental API are
  deprecated. The new functions `top` and `pop` can be used instead to
  inspect the parser's stack. The module `MenhirLib.General` is deprecated
  as well. Deprecated functionality will be removed in the future.

POTTIER Francois's avatar
POTTIER Francois committed
204 205 206 207 208
* Incompatible change in the incremental API: the type of the function
  `print_stack` in the result signature of the functor
  `MenhirLib.Printers.Make` changes to `'a env -> unit`.
   (Anyway, as of now, `MenhirLib.Printers` remains undocumented.)

POTTIER Francois's avatar
POTTIER Francois committed
209 210 211
* Improved the syntax error message that is displayed when a `.mly` file
  is incorrect: the previous and next token are shown.

212 213
* Fixed a bug where the module name `Basics` was shadowed (that is, if the user's
  project happened to contain a toplevel module by this name, then it could not
POTTIER Francois's avatar
POTTIER Francois committed
214
  be referred to from a `.mly` file). (Reported by François Thiré.)
215

POTTIER Francois's avatar
POTTIER Francois committed
216
## 2017/01/01
217 218 219 220 221

* Add `$MENHIR_STDLIB` as a way of controlling where Menhir looks for the file
  `standard.mly`. This environment variable overrides the installation-time
  default setting, and is itself overridden by the `--stdlib` command line
  switch. (Requested by Jonathan Protzenko.)
POTTIER Francois's avatar
POTTIER Francois committed
222

223 224 225
* `Makefile` fix: filter out `'\r'` in the output of `menhir --suggest-ocamlfind`,
  so that the `Makefile` works when Menhir is compiled as a Windows executable.
  (Suggested by Jonathan Protzenko.)
226

POTTIER Francois's avatar
POTTIER Francois committed
227
## 2016/12/01
228 229 230

* Updated the Coq back-end for compatibility with Coq 8.6.
  (Jacques-Henri Jourdan.)
POTTIER Francois's avatar
POTTIER Francois committed
231

POTTIER Francois's avatar
POTTIER Francois committed
232
## 2016/11/15
233 234 235 236 237 238

* Fix in `--only-preprocess-for-ocamlyacc` mode: avoid printing newline characters
  inside a `%type` declaration, as this is forbidden by `ocamlyacc`. (Reported by
  Kenji Maillard.)
* Fix in `--only-preprocess-for-ocamlyacc` mode: avoid variable capture caused by
  `ocamlyacc` internally translating `$i` to `_i`. (Reported by Kenji Maillard.)
239

POTTIER Francois's avatar
POTTIER Francois committed
240
## 2016/09/01
241 242 243 244 245

* New command line switch `--only-preprocess-for-ocamlyacc`, supposed to print the
  grammar in a form that `ocamlyacc` can accept. As of now, this feature is
  incomplete (in particular, support for Menhir's position keywords is missing),
  untested, and undocumented. It could be removed in the future.
POTTIER Francois's avatar
POTTIER Francois committed
246

POTTIER Francois's avatar
POTTIER Francois committed
247
## 2016/08/26
248 249

* Fixes in the output of `--only-preprocess`:
250 251 252 253
  * The order of productions is now preserved.
      (It was not. This matters if there are reduce/reduce conflicts.)
  * `%parameter` directives are now printed. (They were not).
  * `%on_error_reduce` directives are now printed. (They were not.)
254

POTTIER Francois's avatar
POTTIER Francois committed
255
## 2016/08/25
256 257 258 259

* `Makefile` fix, undoing a change made on 2016/03/03, which caused installation
  to fail under (some versions of?) Windows where dynamic linking is not
  supported. (Reported by Andrew Appel.)
260

POTTIER Francois's avatar
POTTIER Francois committed
261
## 2016/08/05
262 263 264 265 266

* `%on_error_reduce` declarations now have implicit priority levels, so as to
  tell Menhir what to do when two such declarations are applicable.
  Also, the well-formedness checks on `%type` and `%on_error_reduce` declarations
  have been reinforced.
POTTIER Francois's avatar
POTTIER Francois committed
267

POTTIER Francois's avatar
POTTIER Francois committed
268
## 2016/06/23
269 270 271 272 273 274

* A small change in the generated code (both in the code and table back-ends) so
  as to avoid OCaml's warning 41. The warning would arise (when compiling a
  generated parser with OCaml 4.03) because Menhir's exception `Error` has the
  same name as the data constructor `Error` in OCaml's pervasive library.
  (Reported by Bernhard Schommer.)
275

POTTIER Francois's avatar
POTTIER Francois committed
276
## 2016/05/18
277 278 279 280 281

* Anonymous rules now work also when used inside a parameterized rule.
  (This did not work until now.) When an anonymous rule is hoisted out
  of a parameterized rule, it may itself become parameterized. Menhir
  parameterizes it only over the parameters that it actually needs.
282

POTTIER Francois's avatar
POTTIER Francois committed
283
## 2016/05/04
284 285 286 287 288

* In the Coq backend, split the largest definitions into smaller
  ones. This circumvents a limitation of vm_compute on 32 bit
  machines. This also enables us to perform sharing between
  definitions, so that the generated files are much smaller.
Jacques-Henri Jourdan's avatar
CHANGES  
Jacques-Henri Jourdan committed
289

POTTIER Francois's avatar
POTTIER Francois committed
290
## 2016/04/10
291 292 293

* When printing a grammar (which is done by the `--only-preprocess` options),
  remove the leading bar `|`, for compatibility with `yacc` and `bison`.
POTTIER Francois's avatar
POTTIER Francois committed
294

POTTIER Francois's avatar
POTTIER Francois committed
295
## 2016/03/11
296 297 298 299 300

* In the code back-end, generate type annotations when extracting a semantic
  value out of the stack. When working with a semantic value of some function
  type, OCaml would incorrectly warn that this function does not use its
  argument. This warning should now be gone.
301

POTTIER Francois's avatar
POTTIER Francois committed
302
## 2016/03/03
303 304 305

* Makefile changes, so as to support `ocamlbuild` 4.03, which seems to have
  stricter hygiene rules than previous versions.
POTTIER Francois's avatar
POTTIER Francois committed
306

POTTIER Francois's avatar
POTTIER Francois committed
307
## 2015/12/30
308 309 310 311

* Prevented an incorrect installation that would take place if `USE_OCAMLFIND`
  was given during `make all` but not during `make install`. Added a command
  line directive `--suggest-ocamlfind`.
312

POTTIER Francois's avatar
POTTIER Francois committed
313
## 2015/11/11
314 315 316 317

* Fixed a severe bug in Menhir 20151110 which (when using the code back-end)
  could cause a generated parser to crash. Thanks to ygrek for reporting the
  bug.
POTTIER Francois's avatar
POTTIER Francois committed
318

319
* The code produced by version `XXXXXXXX` of `menhir --table` can now be linked only
320 321 322
  against a matching version of MenhirLib. If an incorrect version of MenhirLib
  is installed, the OCaml compiler should complain that
  `MenhirLib.StaticVersion.require_XXXXXXXX` is undefined.
323

POTTIER Francois's avatar
POTTIER Francois committed
324
## 2015/11/10
325 326 327

* Optimized the computation of `$symbolstartpos`, based on a couple of assumptions
  about the lexer. (See the manual.)
POTTIER Francois's avatar
POTTIER Francois committed
328

POTTIER Francois's avatar
POTTIER Francois committed
329
## 2015/11/04
330 331 332 333 334

* Modified the treatment of `%inline` so that the positions that are computed are
  the same, regardless of whether `%inline` is used. This property did not hold
  until now. It now does. Of course, this means that the positions computed by
  the new Menhir are not the same as those computed by older versions of Menhir.
POTTIER Francois's avatar
POTTIER Francois committed
335

336 337 338
* Fixed a bug in the treatment of `%inline` that would lead to an incorrect
  position being computed when the caller and callee had a variable by the
  same name.
POTTIER Francois's avatar
POTTIER Francois committed
339

340 341 342 343 344 345 346 347
* Modified Menhir so as to compute the start and end positions in the exact same
  way as `ocamlyacc`. (There used to be a difference in the treatment of epsilon
  productions.) Of course, this means that the positions computed by the new
  Menhir are not the same as those computed by older versions of Menhir. Added
  the keyword `$symbolstartpos` so as to simulate `Parsing.symbol_start_pos()`
  in the `ocamlyacc` world. The keyword `$startpos` sometimes produces a position
  that is too far off to the left; `$symbolstartpos` produces a more accurate
  position.
POTTIER Francois's avatar
POTTIER Francois committed
348

349 350 351
* Incompatible change of the incremental API: instead of a unit argument, the
  entry points (which are named after the start symbols) now require an initial
  position, which typically should be `lexbuf.lex_curr_p`.
352

POTTIER Francois's avatar
POTTIER Francois committed
353
## 2015/11/03
354 355 356

* Fix-fix-and-re-fix the `Makefile` in an attempt to allow installation under
  opam/Windows. Thanks to Daniel Weil for patient explanations and testing.
357

POTTIER Francois's avatar
POTTIER Francois committed
358
## 2015/10/29
359 360 361 362 363 364

* MenhirLib is now installed in both binary and source forms.
  `menhir --suggest-menhirLib` reports where MenhirLib is installed.
  This can be used to retrieve a snapshot of MenhirLib in source form
  and include it in your project (if you wish to use `--table` mode, yet
  do not wish to have a dependency on MenhirLib).
365

POTTIER Francois's avatar
POTTIER Francois committed
366
## 2015/10/26
367 368 369 370

* Allow `--list-errors` to work on 32-bit machines (with low hard limits).
  This should fix a problem whereby the 2015/10/23 release could not
  bootstrap on a 32-bit machine.
371

POTTIER Francois's avatar
POTTIER Francois committed
372
## 2015/10/23
373 374 375 376 377 378 379 380 381

* New declaration `%on_error_reduce foo`, where `foo` is a nonterminal symbol.
  This modifies the automaton as follows. In every state where a production of
  the form `foo -> ...` is ready to be reduced, every error action is replaced
  with a reduction of this production. (If there is a conflict between several
  productions that could be reduced in this manner, nothing is done.) This does
  not affect the language that is accepted by the automaton, but delays the
  detection of an error: more reductions take place before the error is
  detected.
POTTIER Francois's avatar
POTTIER Francois committed
382

383 384 385 386
* Fixed a bug whereby Menhir would warn about a useless `%prec` declaration,
  even though it was useful. This would happen when the declaration was
  duplicated (by inlining or by macro-expansion) and some but not all of
  the copies were useful.
387

388
* Added `has_default_reduction` to the incremental API.
389

390 391 392 393
* Modified the meaning of `--canonical` to allow default reductions to take
  place. This implies no loss of precision in terms of lookahead sets,
  and should allow gaining more contextual information when a syntax
  error is encountered. (It should also lead to a smaller automaton.)
394

395 396 397 398 399 400 401 402 403 404 405 406 407 408
* A brand new set of tools to work on syntax errors.
* New command `--list-errors`, which produces a list of input sentences which
  are representative of all possible syntax errors. (Costly.)
* New command `--interpret-error`, which confirms that one particular input
  sentence ends in a syntax error, and prints the number of the state in
  which this error occurs.
* New command `--compile-errors`, which compiles a list of erroneous sentences
  (together with error messages) to OCaml code.
* New command `--compare-errors`, which compares two lists of erroneous sentences
  to check if they cover the same error states.
* New command `--update-errors`, which updates the auto-generated comments in
  a list of erroneous sentences.
* New command `--echo-errors`, which removes all comments and messages from
  a list of erroneous sentences, and echoes just the sentences.
POTTIER Francois's avatar
POTTIER Francois committed
409

POTTIER Francois's avatar
POTTIER Francois committed
410
## 2015/10/16
411 412

* Additions to the incremental API.
413 414 415 416 417 418 419
  * A `supplier` is a function that produces tokens on demand.
  * `lexer_lexbuf_to_supplier` turns a lexer and a lexbuf into a supplier.
  * `loop` is a ready-made made main parsing loop.
  * `loop_handle` is a variant that lets the user do her own error handling.
  * `loop_handle_undo` is a variant that additionally allows undoing the last
    few "spurious" reductions.
  * `number` maps a state of the LR(1) automaton to its number.
420 421 422 423

* Incompatible change of the incremental API: renamed the type `'a result`
  to `'a checkpoint`. This is a better name anyway, and should help avoid
  confusion with the type `'a result` introduced in OCaml 4.03.
424

POTTIER Francois's avatar
POTTIER Francois committed
425
## 2015/10/12
426 427

* Avoid using `$(shell pwd)` in `Makefile`, for better Windows compatibility.
428

POTTIER Francois's avatar
POTTIER Francois committed
429
## 2015/10/05
430 431 432

* Fixed a bug where inconsistent OCaml code was generated when `--table`
  and `--external-tokens` were used together. (Reported by Darin Morrison.)
433

434 435
* In `--infer` mode, leave the `.ml` file around (instead of removing it) if
  `ocamlc` fails, so we have a chance to understand what's wrong.
436

POTTIER Francois's avatar
POTTIER Francois committed
437
## 2015/09/21
438 439 440

* Re-established some error messages concerning the mis-use of `$i` which
  had disappeared on 2015/06/29.
POTTIER Francois's avatar
POTTIER Francois committed
441

POTTIER Francois's avatar
POTTIER Francois committed
442
## 2015/09/11
443 444 445 446 447

* Fixed the mysterious message that would appear when a nonterminal symbol
  begins with an uppercase letter and `--infer` is turned on. Clarified the
  documentation to indicate that a (non-start) nonterminal symbol can begin
  with an uppercase letter, but this is not recommended.
448

POTTIER Francois's avatar
POTTIER Francois committed
449
## 2015/08/27
450 451 452 453 454 455

* New option `--inspection` (added last January, documented only now). This
  generates an inspection API which allows inspecting the automaton's stack,
  among other things. This API can in principle be used to write custom code
  for error reporting, error recovery, etc. It is not yet mature and may
  change in the future.
POTTIER Francois's avatar
POTTIER Francois committed
456

POTTIER Francois's avatar
POTTIER Francois committed
457
## 2015/07/20
458 459

* Added the command line options `--unused-token <symbol>` and `--unused-tokens`.
460

POTTIER Francois's avatar
POTTIER Francois committed
461
## 2015/06/29
462 463 464 465 466

* Changed the treatment of the positional keywords `$i`. They are now
  rewritten into variables of the form `_i` where `i` is an integer.
  Users are advised not to use variables of this form inside semantic
  actions.
Yann Régis-Gianas's avatar
Yann Régis-Gianas committed
467

POTTIER Francois's avatar
POTTIER Francois committed
468
## 2015/02/11
469 470 471 472 473

* Added support for anonymous rules. This allows writing, e.g.,
  `list(e = expression SEMI { e })`
  whereas previously one should have written
  `list(terminated(e, SEMI))`.
474

POTTIER Francois's avatar
POTTIER Francois committed
475
## 2015/02/09
476 477

* Moved all of the demos to `ocamlbuild` (instead of `make`).
478

POTTIER Francois's avatar
POTTIER Francois committed
479
## 2015/01/18
480 481 482

* Incompatible change of the incremental API.
  The incremental API now exposes shift events too.
483

POTTIER Francois's avatar
POTTIER Francois committed
484
## 2015/01/16
485 486 487 488

* Fixed a couple bugs in `Makefile` and `src/Makefile` which would cause
  compilation and installation to fail with `TARGET=byte`. (Reported
  by Jérémie Courrèges-Anglas and Daniel Dickman.)
489

POTTIER Francois's avatar
POTTIER Francois committed
490
## 2015/01/01
491 492 493

* Incompatible change of the incremental API.
  The entry point `main_incremental` is now named `Incremental.main`.
494

POTTIER Francois's avatar
POTTIER Francois committed
495
## 2014/12/29
496 497

* Incompatible change of the incremental API.
498 499 500 501 502
  * The API now exposes reduction events.
  * The type `'a result` is now private.
  * The type `env` is no longer parameterized.
  * `handle` is renamed to `resume`.
  * `offer` and `resume` now expect a result, not an environment.
503

POTTIER Francois's avatar
POTTIER Francois committed
504
## 2014/12/22
505 506

* Documented the Coq back-end (designed and implemented by Jacques-Henri Jourdan).
507

POTTIER Francois's avatar
POTTIER Francois committed
508
## 2014/12/15
509 510

* New incremental API (in `--table` mode only), inspired by Frédéric Bour.
POTTIER Francois's avatar
POTTIER Francois committed
511

POTTIER Francois's avatar
POTTIER Francois committed
512
## 2014/12/11
513

514 515 516 517 518 519 520
* Menhir now reports an error if one of the start symbols produces
  either the empty language or the singleton language {epsilon}.

* Although some people out there actually define a start symbol that recognizes
  {epsilon} (and use it as a way of initializing or re-initializing some global
  state), this is considered bad style. Furthermore, by ruling out this case, we
  are able to simplify the table back-end a little bit.
521

POTTIER Francois's avatar
POTTIER Francois committed
522
## 2014/12/12
523 524

* A speed improvement in the code back-end.
POTTIER Francois's avatar
POTTIER Francois committed
525

POTTIER Francois's avatar
POTTIER Francois committed
526
## 2014/12/08
527 528

* Menhir now requires OCaml 4.02 (instead of 3.09).
529

POTTIER Francois's avatar
POTTIER Francois committed
530
## 2014/12/02
531 532 533

* Removed support for the `$previouserror` keyword.
* Removed support for `--error-recovery` mode.
534

POTTIER Francois's avatar
POTTIER Francois committed
535
## 2014/02/18
536

537 538 539 540
* In the Coq backend, use `'` instead of `_` as separator in identifiers.
  Also, correct a serious bug that was inadvertently introduced on
  2013/03/01 (r319).

POTTIER Francois's avatar
POTTIER Francois committed
541
## 2014/02/14
542 543 544

* Lexer fix so as to support an open variant type `[> ...]` within
  a `%type<...>` declaration.
545

POTTIER Francois's avatar
POTTIER Francois committed
546
## 2013/12/16
547 548 549 550 551

* Updated the `Makefile` so that `install` no longer depends on `all`.

* Updated the demos so that the lexer does not invoke `exit 0`
  when encoutering `eof`. (This should be more intuitive.)
fpottier's avatar
fpottier committed
552

POTTIER Francois's avatar
POTTIER Francois committed
553
## 2013/09/11
554 555 556

* Fixed a newline conversion problem that would prevent Menhir from
  building on Windows when using ocaml 4.01.
557

POTTIER Francois's avatar
POTTIER Francois committed
558
## 2013/03/02
559 560 561

* Switched to ocamlbuild. Many thanks to Daniel Weil for offering
  very useful guidance.
fpottier's avatar
fpottier committed
562

POTTIER Francois's avatar
POTTIER Francois committed
563
## 2013/01/16
564 565 566

* `menhir --depend` was broken since someone added new whitespace in the output
  of `ocamldep`. Fixed.
567

POTTIER Francois's avatar
POTTIER Francois committed
568
## 2012/12/19
569 570 571 572

* Fixed a compilation problem that would arise when a file produced
  by Menhir on a 64-bit platform was compiled by ocaml on a 32-bit
  platform.
573

POTTIER Francois's avatar
POTTIER Francois committed
574
## 2012/08/25
575 576 577 578

* Performance improvements in the computation of various information
  about the automaton (module `Invariant`). The improvements will be
  noticeable only for very large automata.
579

POTTIER Francois's avatar
POTTIER Francois committed
580
## 2012/06/07
581 582 583

* The option `--log-grammar 3` (and above) now causes the `FOLLOW` sets for
  terminal symbols to be computed and displayed.
584

POTTIER Francois's avatar
POTTIER Francois committed
585
## 2012/05/25
586 587 588 589 590

* Added the flag `--canonical`, which causes Menhir to produce a canonical LR(1)
  automaton in the style of Knuth. This means that no merging of states takes
  place during the construction of the automaton, and that no default reductions
  are allowed.
591

POTTIER Francois's avatar
POTTIER Francois committed
592
## 2012/01/23
593 594 595 596 597 598

* Fixed a bug whereby a `%nonassoc` declaration was not respected. This
  declaration requests that a shift/reduce conflict be reduced in favor of
  neither shifting nor reducing, that is, a syntax error must occur. However,
  due to an unforeseen interaction with the default reduction mechanism, this
  declaration was sometimes ignored and reduction would take place.
599

POTTIER Francois's avatar
POTTIER Francois committed
600
## 2012/01/09
601 602 603

* Changes in the (undocumented) Coq back-end so as to match the ESOP 2012
  paper.
604

POTTIER Francois's avatar
POTTIER Francois committed
605
## 2011/10/19
606 607 608

* The `Makefile` now tests whether Unix or Windows is used (the test is performed
  by evaluating `Sys.os_type` under `ocaml`) and changes a couple settings accordingly:
609 610
  * the executable file name is either `menhir` or `menhir.exe`
  * the object file suffix is either `.o` or `.obj`
611 612 613

* Added `--strict`, which causes many warnings about the grammar and about the
  automaton to be considered errors.
614

615 616 617 618 619 620
* The `#` annotations that are inserted in the generated `.ml` file now retain their
  full path. (That is, we no longer use `Filename.basename`.) This implies that
  the `#` annotations depend on how Menhir is invoked
  -- e.g., `menhir foo/bar.mly` and `cd foo && menhir bar.mly` will produce different
  results. Nevertheless, this seems reasonable and useful (e.g., in conjunction
  with `ocamlbuild` and a hierarchy of files). Thanks to Daniel Weil.
621

POTTIER Francois's avatar
POTTIER Francois committed
622
## 2011/10/06
623 624

* With the `-lg 1` switch, Menhir now indicates whether the grammar is SLR(1).
625

POTTIER Francois's avatar
POTTIER Francois committed
626
## 2011/05/24
627 628 629 630

* Removed the lock in `ocamldep.wrapper`. It is the responsibility of the user
  to avoid interferences with other processes (or other instances of the script)
  that create and/or remove files.
631

POTTIER Francois's avatar
POTTIER Francois committed
632
## 2011/04/28
633 634 635 636 637

* The (internal) computation of the automaton's invariant was broken and has
  been fixed. Surprisingly, this does not seem to affect the generated code,
  (which was correct,) so no observable bug is fixed. Hopefully no bug is
  introduced!
638

POTTIER Francois's avatar
POTTIER Francois committed
639
## 2011/04/07
640 641 642 643

* The grammar description files (`.mly`) are now read in up front and stored in
  memory while they are parsed. This allows us to avoid the use of `pos_in` and
  `seek_in`, which do not work correctly when CRLF conversion is being performed.
644

POTTIER Francois's avatar
POTTIER Francois committed
645
## 2011/04/05
646 647 648

* Fixed a bug in the type inference module (for parameterized non-terminals)
  which would cause an infinite loop.
649

POTTIER Francois's avatar
POTTIER Francois committed
650
## 2011/01/24
651 652 653 654 655

* Fixed a bug that would cause an assertion failure in the generated parser
  in some situations where the input stream was incorrect and the grammar
  involved the error token. The fix might cause grammars that use the error
  token to behave differently (hopefully more accurately) as of now.
656

POTTIER Francois's avatar
POTTIER Francois committed
657
## 2009/06/18
658 659 660

* `Makefile` changes: build and install only the bytecode version of MenhirLib
  when `TARGET=byte` is set.
661

POTTIER Francois's avatar
POTTIER Francois committed
662
## 2009/02/06
663 664 665

* Fixed `ocamldep.wrapper` to avoid quoting the name of the `ocaml` command.
  This is hoped to fix a compilation problem under MinGW.
666

POTTIER Francois's avatar
POTTIER Francois committed
667
## 2009/02/04
668 669 670

* A `Makefile` fix to avoid a problem under Windows/Cygwin.
* Renamed the `ocaml-check-version` script so as to avoid a warning.
671

POTTIER Francois's avatar
POTTIER Francois committed
672
## 2008/09/05
673 674

* Ocaml summer project: added `--interpret`, `--table`, and `--suggest-*`.
675

POTTIER Francois's avatar
POTTIER Francois committed
676
## 2008/08/06
677 678 679

* Fixed a problem that would cause the code inliner to abort when a semantic
  value and a non-terminal symbol happened to have the same name.
680

681
* Removed code sharing.
682

POTTIER Francois's avatar
POTTIER Francois committed
683
## 2008/06/20
684 685

* Removed an incorrect assertion that caused failures (`lr1.ml`, line 134).
686

POTTIER Francois's avatar
POTTIER Francois committed
687
## 2007/12/05
688 689 690

* Disabled code sharing by default, as it is currently broken. (See Yann's
  message; assertion failure at runtime.)
691

POTTIER Francois's avatar
POTTIER Francois committed
692
## 2007/12/01
693 694 695

* Added an optimization to share code among states that have identical
  outgoing transition tables.
696

POTTIER Francois's avatar
POTTIER Francois committed
697
## 2007/08/30
698 699 700

* Small `Makefile` change: create an executable file for `check-ocaml-version` in
  order to work around the absence of dynamic loading on some platforms.
701

POTTIER Francois's avatar
POTTIER Francois committed
702
## 2007/05/20
703 704 705 706

* Made a fundamental change in the construction of the LR(1) automaton
  in order to eliminate a bug that could lead to spurious conflicts --
  thanks to Ketti for submitting a bug report.
707

POTTIER Francois's avatar
POTTIER Francois committed
708
## 2007/05/18
709 710 711

* Added `--follow-construction` to help understand the construction of the
  LR(1) automaton (very verbose).
712

POTTIER Francois's avatar
POTTIER Francois committed
713
## 2007/05/11
714 715 716 717 718

* Code generation: more explicit qualifications with `Pervasives` so as
  to avoid capture when the user redefines some of the built-in operators,
  such as `(+)`.
* Added a new demo (`calc-param`) that shows how to use `%parameter`.
719

POTTIER Francois's avatar
POTTIER Francois committed
720
## 2007/03/22
721 722 723

* `Makefile` improvements (check for `PREFIX`; bootstrap in bytecode now
  also available). Slight changes to `OMakefile.shared`.
724

POTTIER Francois's avatar
POTTIER Francois committed
725
## 2007/02/15
726 727

* Portability fix in `Makefile` and `Makefile.shared` (avoided `which`).
728

POTTIER Francois's avatar
POTTIER Francois committed
729
## 2006/12/15
730 731

* Portability fix in `Makefile.shared` (replaced `&>` with `2>&1 >`).
732

POTTIER Francois's avatar
POTTIER Francois committed
733
## 2006/06/23
734 735 736 737

* Made a slight restriction to Pager's criterion so as to never introduce
  fake conflict tokens (see `Lr0.compatible`). This might help make conflict
  explanations more accurate in the future.
738

POTTIER Francois's avatar
POTTIER Francois committed
739
## 2006/06/16
740 741

* Fixed bug that would cause positions to become invalid after inlining.
742

POTTIER Francois's avatar
POTTIER Francois committed
743
## 2006/06/15
744 745 746 747

* Fixed `--depend` to be more lenient when analyzing `ocamldep`'s output.
* Added `--raw-depend` which transmits `ocamldep`'s output unchanged (for
  use in conjunction with `omake`).
748

POTTIER Francois's avatar
POTTIER Francois committed
749
## 2006/06/12
750 751 752 753 754 755 756 757 758 759

* Fixed bug that would cause `--only-preprocess` to print `%token` declarations
  also for pseudo-tokens.
* Fixed bug that caused some precedence declarations to be incorrectly
  reported as useless.
* Improved things so that useless pseudo-tokens now also cause warnings.
* Fixed bug that would cause `%type` directives for terminal symbols to
  be incorrectly accepted.
* Fixed bug that would occur when a semantic action containing `$i` keywords
  was inlined.
760

POTTIER Francois's avatar
POTTIER Francois committed
761
## 2006/05/05
762 763 764

* Fixed problem that caused some end-of-stream conflicts not to be reported.
* Fixed Pager's compatibility criterion to avoid creating end-of-stream conflicts.
765

POTTIER Francois's avatar
POTTIER Francois committed
766
## 2006/04/21
767 768 769 770

* Fixed problem that allowed generating incorrect but apparently well-typed
  Objective Caml code when a semantic action was ill-typed and `--infer` was
  omitted.
771

POTTIER Francois's avatar
POTTIER Francois committed
772
## 2006/03/29
773 774

* Improved conflict reports by factoring out maximal common derivation contexts.
775

POTTIER Francois's avatar
POTTIER Francois committed
776
## 2006/03/28
777 778

* Fixed bug that could arise when explaining a conflict in a non-LALR(1) grammar.
779

POTTIER Francois's avatar
POTTIER Francois committed
780
## 2006/03/27
781

782 783
* Changed count of reduce/reduce conflicts to allow a comparison
  with `ocamlyacc`'s diagnostics.
784
* When refusing to resolve a conflict, report all diagnostics before dying.
785

POTTIER Francois's avatar
POTTIER Francois committed
786
## 2006/03/18
787 788 789 790

* Added display of `FOLLOW` sets when using `--log-grammar 2`.
* Added `--graph` option.
* Fixed behavior of `--depend` option.
791

POTTIER Francois's avatar
POTTIER Francois committed
792
## 2006/01/06
793 794

* Removed reversed lists from the standard library.