CHANGES.md 23.5 KB
Newer Older
1 2
# Changes

3 4 5 6 7
## 2017/06/07

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

POTTIER Francois's avatar
POTTIER Francois committed
8 9 10 11 12 13 14 15
## 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.)

16
## 2017/04/18
POTTIER Francois's avatar
POTTIER Francois committed
17

POTTIER Francois's avatar
POTTIER Francois committed
18 19
* Changed Menhir's license from QPL to GPLv2.
  MenhirLib remains under LGPLv2, with a linking exception.
20

POTTIER Francois's avatar
POTTIER Francois committed
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
* 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.)

36 37 38
* 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.)
39

POTTIER Francois's avatar
POTTIER Francois committed
40 41 42 43 44 45 46 47 48
* 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.)
49

50 51 52 53 54
* 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.

55 56 57 58
* 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`.
59

60 61 62 63 64
* 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
65 66 67 68 69
* 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
70 71 72
* Improved the syntax error message that is displayed when a `.mly` file
  is incorrect: the previous and next token are shown.

73 74
* 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
75
  be referred to from a `.mly` file). (Reported by François Thiré.)
76

77
## 2017/01/01
78 79 80 81 82

* 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
83

84 85 86
* `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.)
87

88
## 2016/12/01
89 90 91

* Updated the Coq back-end for compatibility with Coq 8.6.
  (Jacques-Henri Jourdan.)
POTTIER Francois's avatar
POTTIER Francois committed
92

93
## 2016/11/15
94 95 96 97 98 99

* 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.)
100

101
## 2016/09/01
102 103 104 105 106

* 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
107

108
## 2016/08/26
109 110

* Fixes in the output of `--only-preprocess`:
111 112 113 114
  * 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.)
115

116
## 2016/08/25
117 118 119 120

* `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.)
121

122
## 2016/08/05
123 124 125 126 127

* `%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
128

129
## 2016/06/23
130 131 132 133 134 135

* 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.)
136

137
## 2016/05/18
138 139 140 141 142

* 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.
143

144
## 2016/05/04
145 146 147 148 149

* 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
Jacques-Henri Jourdan committed
150

151
## 2016/04/10
152 153 154

* 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
155

156
## 2016/03/11
157 158 159 160 161

* 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.
162

163
## 2016/03/03
164 165 166

* 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
167

168
## 2015/12/30
169 170 171 172

* 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`.
173

174
## 2015/11/11
175 176 177 178

* 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
179

180
* The code produced by version `XXXXXXXX` of `menhir --table` can now be linked only
181 182 183
  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.
184

185
## 2015/11/10
186 187 188

* Optimized the computation of `$symbolstartpos`, based on a couple of assumptions
  about the lexer. (See the manual.)
POTTIER Francois's avatar
POTTIER Francois committed
189

190
## 2015/11/04
191 192 193 194 195

* 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
196

197 198 199
* 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
200

201 202 203 204 205 206 207 208
* 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
209

210 211 212
* 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`.
213

214
## 2015/11/03
215 216 217

* 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.
218

219
## 2015/10/29
220 221 222 223 224 225

* 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).
226

227
## 2015/10/26
228 229 230 231

* 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.
232

233
## 2015/10/23
234 235 236 237 238 239 240 241 242

* 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
243

244 245 246 247
* 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.
248

249
* Added `has_default_reduction` to the incremental API.
250

251 252 253 254
* 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.)
255

256 257 258 259 260 261 262 263 264 265 266 267 268 269
* 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
270

271
## 2015/10/16
272 273

* Additions to the incremental API.
274 275 276 277 278 279 280
  * 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.
281 282 283 284

* 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.
285

286
## 2015/10/12
287 288

* Avoid using `$(shell pwd)` in `Makefile`, for better Windows compatibility.
289

290
## 2015/10/05
291 292 293

* Fixed a bug where inconsistent OCaml code was generated when `--table`
  and `--external-tokens` were used together. (Reported by Darin Morrison.)
294

295 296
* 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.
297

298
## 2015/09/21
299 300 301

* 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
302

303
## 2015/09/11
304 305 306 307 308

* 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.
309

310
## 2015/08/27
311 312 313 314 315 316

* 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.
317

318
## 2015/07/20
319 320

* Added the command line options `--unused-token <symbol>` and `--unused-tokens`.
321

322
## 2015/06/29
323 324 325 326 327

* 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
328

329
## 2015/02/11
330 331 332 333 334

* 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))`.
335

336
## 2015/02/09
337 338

* Moved all of the demos to `ocamlbuild` (instead of `make`).
339

340
## 2015/01/18
341 342 343

* Incompatible change of the incremental API.
  The incremental API now exposes shift events too.
344

345
## 2015/01/16
346 347 348 349

* 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.)
350

351
## 2015/01/01
352 353 354

* Incompatible change of the incremental API.
  The entry point `main_incremental` is now named `Incremental.main`.
355

356
## 2014/12/29
357 358

* Incompatible change of the incremental API.
359 360 361 362 363
  * 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.
364

365
## 2014/12/22
366 367

* Documented the Coq back-end (designed and implemented by Jacques-Henri Jourdan).
368

369
## 2014/12/15
370 371

* New incremental API (in `--table` mode only), inspired by Frédéric Bour.
POTTIER Francois's avatar
POTTIER Francois committed
372

373
## 2014/12/11
374

375 376 377 378 379 380 381
* 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.
382

383
## 2014/12/12
384 385

* A speed improvement in the code back-end.
POTTIER Francois's avatar
POTTIER Francois committed
386

387
## 2014/12/08
388 389

* Menhir now requires OCaml 4.02 (instead of 3.09).
390

391
## 2014/12/02
392 393 394

* Removed support for the `$previouserror` keyword.
* Removed support for `--error-recovery` mode.
395

396
## 2014/02/18
397

398 399 400 401
* 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).

402
## 2014/02/14
403 404 405

* Lexer fix so as to support an open variant type `[> ...]` within
  a `%type<...>` declaration.
406

407
## 2013/12/16
408 409 410 411 412

* 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
413

414
## 2013/09/11
415 416 417

* Fixed a newline conversion problem that would prevent Menhir from
  building on Windows when using ocaml 4.01.
418

419
## 2013/03/02
420 421 422

* Switched to ocamlbuild. Many thanks to Daniel Weil for offering
  very useful guidance.
fpottier's avatar
fpottier committed
423

424
## 2013/01/16
425 426 427

* `menhir --depend` was broken since someone added new whitespace in the output
  of `ocamldep`. Fixed.
428

429
## 2012/12/19
430 431 432 433

* 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.
434

435
## 2012/08/25
436 437 438 439

* Performance improvements in the computation of various information
  about the automaton (module `Invariant`). The improvements will be
  noticeable only for very large automata.
440

441
## 2012/06/07
442 443 444

* The option `--log-grammar 3` (and above) now causes the `FOLLOW` sets for
  terminal symbols to be computed and displayed.
445

446
## 2012/05/25
447 448 449 450 451

* 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.
452

453
## 2012/01/23
454 455 456 457 458 459

* 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.
460

461
## 2012/01/09
462 463 464

* Changes in the (undocumented) Coq back-end so as to match the ESOP 2012
  paper.
465

466
## 2011/10/19
467 468 469

* 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:
470 471
  * the executable file name is either `menhir` or `menhir.exe`
  * the object file suffix is either `.o` or `.obj`
472 473 474

* Added `--strict`, which causes many warnings about the grammar and about the
  automaton to be considered errors.
475

476 477 478 479 480 481
* 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.
482

483
## 2011/10/06
484 485

* With the `-lg 1` switch, Menhir now indicates whether the grammar is SLR(1).
486

487
## 2011/05/24
488 489 490 491

* 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.
492

493
## 2011/04/28
494 495 496 497 498

* 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!
499

500
## 2011/04/07
501 502 503 504

* 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.
505

506
## 2011/04/05
507 508 509

* Fixed a bug in the type inference module (for parameterized non-terminals)
  which would cause an infinite loop.
510

511
## 2011/01/24
512 513 514 515 516

* 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.
517

518
## 2009/06/18
519 520 521

* `Makefile` changes: build and install only the bytecode version of MenhirLib
  when `TARGET=byte` is set.
522

523
## 2009/02/06
524 525 526

* Fixed `ocamldep.wrapper` to avoid quoting the name of the `ocaml` command.
  This is hoped to fix a compilation problem under MinGW.
527

528
## 2009/02/04
529 530 531

* A `Makefile` fix to avoid a problem under Windows/Cygwin.
* Renamed the `ocaml-check-version` script so as to avoid a warning.
532

533
## 2008/09/05
534 535

* Ocaml summer project: added `--interpret`, `--table`, and `--suggest-*`.
536

537
## 2008/08/06
538 539 540

* 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.
541

542
* Removed code sharing.
543

544
## 2008/06/20
545 546

* Removed an incorrect assertion that caused failures (`lr1.ml`, line 134).
547

548
## 2007/12/05
549 550 551

* Disabled code sharing by default, as it is currently broken. (See Yann's
  message; assertion failure at runtime.)
552

553
## 2007/12/01
554 555 556

* Added an optimization to share code among states that have identical
  outgoing transition tables.
557

558
## 2007/08/30
559 560 561

* Small `Makefile` change: create an executable file for `check-ocaml-version` in
  order to work around the absence of dynamic loading on some platforms.
562

563
## 2007/05/20
564 565 566 567

* 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.
568

569
## 2007/05/18
570 571 572

* Added `--follow-construction` to help understand the construction of the
  LR(1) automaton (very verbose).
573

574
## 2007/05/11
575 576 577 578 579

* 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`.
580

581
## 2007/03/22
582 583 584

* `Makefile` improvements (check for `PREFIX`; bootstrap in bytecode now
  also available). Slight changes to `OMakefile.shared`.
585

586
## 2007/02/15
587 588

* Portability fix in `Makefile` and `Makefile.shared` (avoided `which`).
589

590
## 2006/12/15
591 592

* Portability fix in `Makefile.shared` (replaced `&>` with `2>&1 >`).
593

594
## 2006/06/23
595 596 597 598

* 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.
599

600
## 2006/06/16
601 602

* Fixed bug that would cause positions to become invalid after inlining.
603

604
## 2006/06/15
605 606 607 608

* 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`).
609

610
## 2006/06/12
611 612 613 614 615 616 617 618 619 620

* 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.
621

622
## 2006/05/05
623 624 625

* 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.
626

627
## 2006/04/21
628 629 630 631

* Fixed problem that allowed generating incorrect but apparently well-typed
  Objective Caml code when a semantic action was ill-typed and `--infer` was
  omitted.
632

633
## 2006/03/29
634 635

* Improved conflict reports by factoring out maximal common derivation contexts.
636

637
## 2006/03/28
638 639

* Fixed bug that could arise when explaining a conflict in a non-LALR(1) grammar.
640

641
## 2006/03/27
642

643 644
* Changed count of reduce/reduce conflicts to allow a comparison
  with `ocamlyacc`'s diagnostics.
645
* When refusing to resolve a conflict, report all diagnostics before dying.
646

647
## 2006/03/18
648 649 650 651

* Added display of `FOLLOW` sets when using `--log-grammar 2`.
* Added `--graph` option.
* Fixed behavior of `--depend` option.
652

653
## 2006/01/06
654 655

* Removed reversed lists from the standard library.