vendor/regex-1.4.6/CHANGELOG.md

   1 1.4.6 (2021-04-22)
   2 ==================
   3 This is a small patch release that fixes the compiler's size check on how much
   4 heap memory a regex uses. Previously, the compiler did not account for the
   5 heap usage of Unicode character classes. Now it does. It's possible that this
   6 may make some regexes fail to compile that previously did compile. If that
   7 happens, please file an issue.
   8
   9 * [BUG OSS-fuzz#33579](https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33579):
  10   Some regexes can use more heap memory than one would expect.
  11
  12
  13 1.4.5 (2021-03-14)
  14 ==================
  15 This is a small patch release that fixes a regression in the size of a `Regex`
  16 in the 1.4.4 release. Prior to 1.4.4, a `Regex` was 552 bytes. In the 1.4.4
  17 release, it was 856 bytes due to internal changes. In this release, a `Regex`
  18 is now 16 bytes. In general, the size of a `Regex` was never something that was
  19 on my radar, but this increased size in the 1.4.4 release seems to have crossed
  20 a threshold and resulted in stack overflows in some programs.
  21
  22 * [BUG #750](https://github.com/rust-lang/regex/pull/750):
  23   Fixes stack overflows seemingly caused by a large `Regex` size by decreasing
  24   its size.
  25
  26
  27 1.4.4 (2021-03-11)
  28 ==================
  29 This is a small patch release that contains some bug fixes. Notably, it also
  30 drops the `thread_local` (and `lazy_static`, via transitivity) dependencies.
  31
  32 Bug fixes:
  33
  34 * [BUG #362](https://github.com/rust-lang/regex/pull/362):
  35   Memory leaks caused by an internal caching strategy should now be fixed.
  36 * [BUG #576](https://github.com/rust-lang/regex/pull/576):
  37   All regex types now implement `UnwindSafe` and `RefUnwindSafe`.
  38 * [BUG #728](https://github.com/rust-lang/regex/pull/749):
  39   Add missing `Replacer` impls for `Vec<u8>`, `String`, `Cow`, etc.
  40
  41
  42 1.4.3 (2021-01-08)
  43 ==================
  44 This is a small patch release that adds some missing standard trait
  45 implementations for some types in the public API.
  46
  47 Bug fixes:
  48
  49 * [BUG #734](https://github.com/rust-lang/regex/pull/734):
  50   Add `FusedIterator` and `ExactSizeIterator` impls to iterator types.
  51 * [BUG #735](https://github.com/rust-lang/regex/pull/735):
  52   Add missing `Debug` impls to public API types.
  53
  54
  55 1.4.2 (2020-11-01)
  56 ==================
  57 This is a small bug fix release that bans `\P{any}`. We previously banned empty
  58 classes like `[^\w\W]`, but missed the `\P{any}` case. In the future, we hope
  59 to permit empty classes.
  60
  61 * [BUG #722](https://github.com/rust-lang/regex/issues/722):
  62   Ban `\P{any}` to avoid a panic in the regex compiler. Found by OSS-Fuzz.
  63
  64
  65 1.4.1 (2020-10-13)
  66 ==================
  67 This is a small bug fix release that makes `\p{cf}` work. Previously, it would
  68 report "property not found" even though `cf` is a valid abbreviation for the
  69 `Format` general category.
  70
  71 * [BUG #719](https://github.com/rust-lang/regex/issues/719):
  72   Fixes bug that prevented `\p{cf}` from working.
  73
  74
  75 1.4.0 (2020-10-11)
  76 ==================
  77 This releases has a few minor documentation fixes as well as some very minor
  78 API additions. The MSRV remains at Rust 1.28 for now, but this is intended to
  79 increase to at least Rust 1.41.1 soon.
  80
  81 This release also adds support for OSS-Fuzz. Kudos to
  82 [@DavidKorczynski](https://github.com/DavidKorczynski)
  83 for doing the heavy lifting for that!
  84
  85 New features:
  86
  87 * [FEATURE #649](https://github.com/rust-lang/regex/issues/649):
  88   Support `[`, `]` and `.` in capture group names.
  89 * [FEATURE #687](https://github.com/rust-lang/regex/issues/687):
  90   Add `is_empty` predicate to `RegexSet`.
  91 * [FEATURE #689](https://github.com/rust-lang/regex/issues/689):
  92   Implement `Clone` for `SubCaptureMatches`.
  93 * [FEATURE #715](https://github.com/rust-lang/regex/issues/715):
  94   Add `empty` constructor to `RegexSet` for convenience.
  95
  96 Bug fixes:
  97
  98 * [BUG #694](https://github.com/rust-lang/regex/issues/694):
  99   Fix doc example for `Replacer::replace_append`.
 100 * [BUG #698](https://github.com/rust-lang/regex/issues/698):
 101   Clarify docs for `s` flag when using a `bytes::Regex`.
 102 * [BUG #711](https://github.com/rust-lang/regex/issues/711):
 103   Clarify `is_match` docs to indicate that it can match anywhere in string.
 104
 105
 106 1.3.9 (2020-05-28)
 107 ==================
 108 This release fixes a MSRV (Minimum Support Rust Version) regression in the
 109 1.3.8 release. Namely, while 1.3.8 compiles on Rust 1.28, it actually does not
 110 compile on other Rust versions, such as Rust 1.39.
 111
 112 Bug fixes:
 113
 114 * [BUG #685](https://github.com/rust-lang/regex/issues/685):
 115   Remove use of `doc_comment` crate, which cannot be used before Rust 1.43.
 116
 117
 118 1.3.8 (2020-05-28)
 119 ==================
 120 This release contains a couple of important bug fixes driven
 121 by better support for empty-subexpressions in regexes. For
 122 example, regexes like `b|` are now allowed. Major thanks to
 123 [@sliquister](https://github.com/sliquister) for implementing support for this
 124 in [#677](https://github.com/rust-lang/regex/pull/677).
 125
 126 Bug fixes:
 127
 128 * [BUG #523](https://github.com/rust-lang/regex/pull/523):
 129   Add note to documentation that spaces can be escaped in `x` mode.
 130 * [BUG #524](https://github.com/rust-lang/regex/issues/524):
 131   Add support for empty sub-expressions, including empty alternations.
 132 * [BUG #659](https://github.com/rust-lang/regex/issues/659):
 133   Fix match bug caused by an empty sub-expression miscompilation.
 134
 135
 136 1.3.7 (2020-04-17)
 137 ==================
 138 This release contains a small bug fix that fixes how `regex` forwards crate
 139 features to `regex-syntax`. In particular, this will reduce recompilations in
 140 some cases.
 141
 142 Bug fixes:
 143
 144 * [BUG #665](https://github.com/rust-lang/regex/pull/665):
 145   Fix feature forwarding to `regex-syntax`.
 146
 147
 148 1.3.6 (2020-03-24)
 149 ==================
 150 This release contains a sizable (~30%) performance improvement when compiling
 151 some kinds of large regular expressions.
 152
 153 Performance improvements:
 154
 155 * [PERF #657](https://github.com/rust-lang/regex/pull/657):
 156   Improvement performance of compiling large regular expressions.
 157
 158
 159 1.3.5 (2020-03-12)
 160 ==================
 161 This release updates this crate to Unicode 13.
 162
 163 New features:
 164
 165 * [FEATURE #653](https://github.com/rust-lang/regex/pull/653):
 166   Update `regex-syntax` to Unicode 13.
 167
 168
 169 1.3.4 (2020-01-30)
 170 ==================
 171 This is a small bug fix release that fixes a bug related to the scoping of
 172 flags in a regex. Namely, before this fix, a regex like `((?i)a)b)` would
 173 match `aB` despite the fact that `b` should not be matched case insensitively.
 174
 175 Bug fixes:
 176
 177 * [BUG #640](https://github.com/rust-lang/regex/issues/640):
 178   Fix bug related to the scoping of flags in a regex.
 179
 180
 181 1.3.3 (2020-01-09)
 182 ==================
 183 This is a small maintenance release that upgrades the dependency on
 184 `thread_local` from `0.3` to `1.0`. The minimum supported Rust version remains
 185 at Rust 1.28.
 186
 187
 188 1.3.2 (2020-01-09)
 189 ==================
 190 This is a small maintenance release with some house cleaning and bug fixes.
 191
 192 New features:
 193
 194 * [FEATURE #631](https://github.com/rust-lang/regex/issues/631):
 195   Add a `Match::range` method an a `From<Match> for Range` impl.
 196
 197 Bug fixes:
 198
 199 * [BUG #521](https://github.com/rust-lang/regex/issues/521):
 200   Corrects `/-/.splitn("a", 2)` to return `["a"]` instead of `["a", ""]`.
 201 * [BUG #594](https://github.com/rust-lang/regex/pull/594):
 202   Improve error reporting when writing `\p\`.
 203 * [BUG #627](https://github.com/rust-lang/regex/issues/627):
 204   Corrects `/-/.split("a-")` to return `["a", ""]` instead of `["a"]`.
 205 * [BUG #633](https://github.com/rust-lang/regex/pull/633):
 206   Squash deprecation warnings for the `std::error::Error::description` method.
 207
 208
 209 1.3.1 (2019-09-04)
 210 ==================
 211 This is a maintenance release with no changes in order to try to work-around
 212 a [docs.rs/Cargo issue](https://github.com/rust-lang/docs.rs/issues/400).
 213
 214
 215 1.3.0 (2019-09-03)
 216 ==================
 217 This release adds a plethora of new crate features that permit users of regex
 218 to shrink its size considerably, in exchange for giving up either functionality
 219 (such as Unicode support) or runtime performance. When all such features are
 220 disabled, the dependency tree for `regex` shrinks to exactly 1 crate
 221 (`regex-syntax`). More information about the new crate features can be
 222 [found in the docs](https://docs.rs/regex/*/#crate-features).
 223
 224 Note that while this is a new minor version release, the minimum supported
 225 Rust version for this crate remains at `1.28.0`.
 226
 227 New features:
 228
 229 * [FEATURE #474](https://github.com/rust-lang/regex/issues/474):
 230   The `use_std` feature has been deprecated in favor of the `std` feature.
 231   The `use_std` feature will be removed in regex 2. Until then, `use_std` will
 232   remain as an alias for the `std` feature.
 233 * [FEATURE #583](https://github.com/rust-lang/regex/issues/583):
 234   Add a substantial number of crate features shrinking `regex`.
 235
 236
 237 1.2.1 (2019-08-03)
 238 ==================
 239 This release does a bit of house cleaning. Namely:
 240
 241 * This repository is now using rustfmt.
 242 * License headers have been removed from all files, in following suit with the
 243   Rust project.
 244 * Teddy has been removed from the `regex` crate, and is now part of the
 245   `aho-corasick` crate.
 246   [See `aho-corasick`'s new `packed` sub-module for details](https://docs.rs/aho-corasick/0.7.6/aho_corasick/packed/index.html).
 247 * The `utf8-ranges` crate has been deprecated, with its functionality moving
 248   into the
 249   [`utf8` sub-module of `regex-syntax`](https://docs.rs/regex-syntax/0.6.11/regex_syntax/utf8/index.html).
 250 * The `ucd-util` dependency has been dropped, in favor of implementing what
 251   little we need inside of `regex-syntax` itself.
 252
 253 In general, this is part of an ongoing (long term) effort to make optimizations
 254 in the regex engine easier to reason about. The current code is too convoluted
 255 and thus it is very easy to introduce new bugs. This simplification effort is
 256 the primary motivation behind re-working the `aho-corasick` crate to not only
 257 bundle algorithms like Teddy, but to also provide regex-like match semantics
 258 automatically.
 259
 260 Moving forward, the plan is to join up with the `bstr` and `regex-automata`
 261 crates, with the former providing more sophisticated substring search
 262 algorithms (thereby deleting existing code in `regex`) and the latter providing
 263 ahead-of-time compiled DFAs for cases where they are inexpensive to compute.
 264
 265
 266 1.2.0 (2019-07-20)
 267 ==================
 268 This release updates regex's minimum supported Rust version to 1.28, which was
 269 release almost 1 year ago. This release also updates regex's Unicode data
 270 tables to 12.1.0.
 271
 272
 273 1.1.9 (2019-07-06)
 274 ==================
 275 This release contains a bug fix that caused regex's tests to fail, due to a
 276 dependency on an unreleased behavior in regex-syntax.
 277
 278 * [BUG #593](https://github.com/rust-lang/regex/issues/593):
 279   Move an integration-style test on error messages into regex-syntax.
 280
 281
 282 1.1.8 (2019-07-04)
 283 ==================
 284 This release contains a few small internal refactorings. One of which fixes
 285 an instance of undefined behavior in a part of the SIMD code.
 286
 287 Bug fixes:
 288
 289 * [BUG #545](https://github.com/rust-lang/regex/issues/545):
 290   Improves error messages when a repetition operator is used without a number.
 291 * [BUG #588](https://github.com/rust-lang/regex/issues/588):
 292   Removes use of a repr(Rust) union used for type punning in the Teddy matcher.
 293 * [BUG #591](https://github.com/rust-lang/regex/issues/591):
 294   Update docs for running benchmarks and improve failure modes.
 295
 296
 297 1.1.7 (2019-06-09)
 298 ==================
 299 This release fixes up a few warnings as a result of recent deprecations.
 300
 301
 302 1.1.6 (2019-04-16)
 303 ==================
 304 This release fixes a regression introduced by a bug fix (for
 305 [BUG #557](https://github.com/rust-lang/regex/issues/557)) which could cause
 306 the regex engine to enter an infinite loop. This bug was originally
 307 [reported against ripgrep](https://github.com/BurntSushi/ripgrep/issues/1247).
 308
 309
 310 1.1.5 (2019-04-01)
 311 ==================
 312 This release fixes a bug in regex's dependency specification where it requires
 313 a newer version of regex-syntax, but this wasn't communicated correctly in the
 314 Cargo.toml. This would have been caught by a minimal version check, but this
 315 check was disabled because the `rand` crate itself advertises incorrect
 316 dependency specifications.
 317
 318 Bug fixes:
 319
 320 * [BUG #570](https://github.com/rust-lang/regex/pull/570):
 321   Fix regex-syntax minimal version.
 322
 323
 324 1.1.4 (2019-03-31)
 325 ==================
 326 This release fixes a backwards compatibility regression where Regex was no
 327 longer UnwindSafe. This was caused by the upgrade to aho-corasick 0.7, whose
 328 AhoCorasick type was itself not UnwindSafe. This has been fixed in aho-corasick
 329 0.7.4, which we now require.
 330
 331 Bug fixes:
 332
 333 * [BUG #568](https://github.com/rust-lang/regex/pull/568):
 334   Fix an API regression where Regex was no longer UnwindSafe.
 335
 336
 337 1.1.3 (2019-03-30)
 338 ==================
 339 This releases fixes a few bugs and adds a performance improvement when a regex
 340 is a simple alternation of literals.
 341
 342 Performance improvements:
 343
 344 * [OPT #566](https://github.com/rust-lang/regex/pull/566):
 345   Upgrades `aho-corasick` to 0.7 and uses it for `foo|bar|...|quux` regexes.
 346
 347 Bug fixes:
 348
 349 * [BUG #527](https://github.com/rust-lang/regex/issues/527):
 350   Fix a bug where the parser would panic on patterns like `((?x))`.
 351 * [BUG #555](https://github.com/rust-lang/regex/issues/555):
 352   Fix a bug where the parser would panic on patterns like `(?m){1,1}`.
 353 * [BUG #557](https://github.com/rust-lang/regex/issues/557):
 354   Fix a bug where captures could lead to an incorrect match.
 355
 356
 357 1.1.2 (2019-02-27)
 358 ==================
 359 This release fixes a bug found in the fix introduced in 1.1.1.
 360
 361 Bug fixes:
 362
 363 * [BUG edf45e6f](https://github.com/rust-lang/regex/commit/edf45e6f):
 364   Fix bug introduced in reverse suffix literal matcher in the 1.1.1 release.
 365
 366
 367 1.1.1 (2019-02-27)
 368 ==================
 369 This is a small release with one fix for a bug caused by literal optimizations.
 370
 371 Bug fixes:
 372
 373 * [BUG 661bf53d](https://github.com/rust-lang/regex/commit/661bf53d):
 374   Fixes a bug in the reverse suffix literal optimization. This was originally
 375   reported
 376   [against ripgrep](https://github.com/BurntSushi/ripgrep/issues/1203).
 377
 378
 379 1.1.0 (2018-11-30)
 380 ==================
 381 This is a small release with a couple small enhancements. This release also
 382 increases the minimal supported Rust version (MSRV) to 1.24.1 (from 1.20.0). In
 383 accordance with this crate's MSRV policy, this release bumps the minor version
 384 number.
 385
 386 Performance improvements:
 387
 388 * [OPT #511](https://github.com/rust-lang/regex/pull/511),
 389   [OPT #540](https://github.com/rust-lang/regex/pull/540):
 390   Improve lazy DFA construction for large regex sets.
 391
 392 New features:
 393
 394 * [FEATURE #538](https://github.com/rust-lang/regex/pull/538):
 395   Add Emoji and "break" Unicode properties. See [UNICODE.md](UNICODE.md).
 396
 397 Bug fixes:
 398
 399 * [BUG #530](https://github.com/rust-lang/regex/pull/530):
 400   Add Unicode license (for data tables).
 401 * Various typo/doc fixups.
 402
 403
 404 1.0.6 (2018-11-06)
 405 ==================
 406 This is a small release.
 407
 408 Performance improvements:
 409
 410 * [OPT #513](https://github.com/rust-lang/regex/pull/513):
 411   Improve performance of compiling large Unicode classes by 8-10%.
 412
 413 Bug fixes:
 414
 415 * [BUG #533](https://github.com/rust-lang/regex/issues/533):
 416   Fix definition of `[[:blank:]]` class that regressed in `regex-syntax 0.5`.
 417
 418
 419 1.0.5 (2018-09-06)
 420 ==================
 421 This is a small release with an API enhancement.
 422
 423 New features:
 424
 425 * [FEATURE #509](https://github.com/rust-lang/regex/pull/509):
 426   Generalize impls of the `Replacer` trait.
 427
 428
 429 1.0.4 (2018-08-25)
 430 ==================
 431 This is a small release that bumps the quickcheck dependency.
 432
 433
 434 1.0.3 (2018-08-24)
 435 ==================
 436 This is a small bug fix release.
 437
 438 Bug fixes:
 439
 440 * [BUG #504](https://github.com/rust-lang/regex/pull/504):
 441   Fix for Cargo's "minimal version" support.
 442 * [BUG 1e39165f](https://github.com/rust-lang/regex/commit/1e39165f):
 443   Fix doc examples for byte regexes.
 444
 445
 446 1.0.2 (2018-07-18)
 447 ==================
 448 This release exposes some new lower level APIs on `Regex` that permit
 449 amortizing allocation and controlling the location at which a search is
 450 performed in a more granular way. Most users of the regex crate will not
 451 need or want to use these APIs.
 452
 453 New features:
 454
 455 * [FEATURE #493](https://github.com/rust-lang/regex/pull/493):
 456   Add a few lower level APIs for amortizing allocation and more fine grained
 457   searching.
 458
 459 Bug fixes:
 460
 461 * [BUG 3981d2ad](https://github.com/rust-lang/regex/commit/3981d2ad):
 462   Correct outdated documentation on `RegexBuilder::dot_matches_new_line`.
 463 * [BUG 7ebe4ae0](https://github.com/rust-lang/regex/commit/7ebe4ae0):
 464   Correct outdated documentation on `Parser::allow_invalid_utf8` in the
 465   `regex-syntax` crate.
 466 * [BUG 24c7770b](https://github.com/rust-lang/regex/commit/24c7770b):
 467   Fix a bug in the HIR printer where it wouldn't correctly escape meta
 468   characters in character classes.
 469
 470
 471 1.0.1 (2018-06-19)
 472 ==================
 473 This release upgrades regex's Unicode tables to Unicode 11, and enables SIMD
 474 optimizations automatically on Rust stable (1.27 or newer).
 475
 476 New features:
 477
 478 * [FEATURE #486](https://github.com/rust-lang/regex/pull/486):
 479   Implement `size_hint` on `RegexSet` match iterators.
 480 * [FEATURE #488](https://github.com/rust-lang/regex/pull/488):
 481   Update Unicode tables for Unicode 11.
 482 * [FEATURE #490](https://github.com/rust-lang/regex/pull/490):
 483   SIMD optimizations are now enabled automatically in Rust stable, for versions
 484   1.27 and up. No compilation flags or features need to be set. CPU support
 485   SIMD is detected automatically at runtime.
 486
 487 Bug fixes:
 488
 489 * [BUG #482](https://github.com/rust-lang/regex/pull/482):
 490   Present a better compilation error when the `use_std` feature isn't used.
 491
 492
 493 1.0.0 (2018-05-01)
 494 ==================
 495 This release marks the 1.0 release of regex.
 496
 497 While this release includes some breaking changes, most users of older versions
 498 of the regex library should be able to migrate to 1.0 by simply bumping the
 499 version number. The important changes are as follows:
 500
 501 * We adopt Rust 1.20 as the new minimum supported version of Rust for regex.
 502   We also tentativley adopt a policy that permits bumping the minimum supported
 503   version of Rust in minor version releases of regex, but no patch releases.
 504   That is, with respect to semver, we do not strictly consider bumping the
 505   minimum version of Rust to be a breaking change, but adopt a conservative
 506   stance as a compromise.
 507 * Octal syntax in regular expressions has been disabled by default. This
 508   permits better error messages that inform users that backreferences aren't
 509   available. Octal syntax can be re-enabled via the corresponding option on
 510   `RegexBuilder`.
 511 * `(?-u:\B)` is no longer allowed in Unicode regexes since it can match at
 512   invalid UTF-8 code unit boundaries. `(?-u:\b)` is still allowed in Unicode
 513   regexes.
 514 * The `From<regex_syntax::Error>` impl has been removed. This formally removes
 515   the public dependency on `regex-syntax`.
 516 * A new feature, `use_std`, has been added and enabled by default. Disabling
 517   the feature will result in a compilation error. In the future, this may
 518   permit us to support `no_std` environments (w/ `alloc`) in a backwards
 519   compatible way.
 520
 521 For more information and discussion, please see
 522 [1.0 release tracking issue](https://github.com/rust-lang/regex/issues/457).
 523
 524
 525 0.2.11 (2018-05-01)
 526 ===================
 527 This release primarily contains bug fixes. Some of them resolve bugs where
 528 the parser could panic.
 529
 530 New features:
 531
 532 * [FEATURE #459](https://github.com/rust-lang/regex/pull/459):
 533   Include C++'s standard regex library and Boost's regex library in the
 534   benchmark harness. We now include D/libphobos, C++/std, C++/boost, Oniguruma,
 535   PCRE1, PCRE2, RE2 and Tcl in the harness.
 536
 537 Bug fixes:
 538
 539 * [BUG #445](https://github.com/rust-lang/regex/issues/445):
 540   Clarify order of indices returned by RegexSet match iterator.
 541 * [BUG #461](https://github.com/rust-lang/regex/issues/461):
 542   Improve error messages for invalid regexes like `[\d-a]`.
 543 * [BUG #464](https://github.com/rust-lang/regex/issues/464):
 544   Fix a bug in the error message pretty printer that could cause a panic when
 545   a regex contained a literal `\n` character.
 546 * [BUG #465](https://github.com/rust-lang/regex/issues/465):
 547   Fix a panic in the parser that was caused by applying a repetition operator
 548   to `(?flags)`.
 549 * [BUG #466](https://github.com/rust-lang/regex/issues/466):
 550   Fix a bug where `\pC` was not recognized as an alias for `\p{Other}`.
 551 * [BUG #470](https://github.com/rust-lang/regex/pull/470):
 552   Fix a bug where literal searches did more work than necessary for anchored
 553   regexes.
 554
 555
 556 0.2.10 (2018-03-16)
 557 ===================
 558 This release primarily updates the regex crate to changes made in `std::arch`
 559 on nightly Rust.
 560
 561 New features:
 562
 563 * [FEATURE #458](https://github.com/rust-lang/regex/pull/458):
 564   The `Hir` type in `regex-syntax` now has a printer.
 565
 566
 567 0.2.9 (2018-03-12)
 568 ==================
 569 This release introduces a new nightly only feature, `unstable`, which enables
 570 SIMD optimizations for certain types of regexes. No additional compile time
 571 options are necessary, and the regex crate will automatically choose the
 572 best CPU features at run time. As a result, the `simd` (nightly only) crate
 573 dependency has been dropped.
 574
 575 New features:
 576
 577 * [FEATURE #456](https://github.com/rust-lang/regex/pull/456):
 578   The regex crate now includes AVX2 optimizations in addition to the extant
 579   SSSE3 optimization.
 580
 581 Bug fixes:
 582
 583 * [BUG #455](https://github.com/rust-lang/regex/pull/455):
 584   Fix a bug where `(?x)[ / - ]` failed to parse.
 585
 586
 587 0.2.8 (2018-03-12)
 588 ==================
 589 Bug gixes:
 590
 591 * [BUG #454](https://github.com/rust-lang/regex/pull/454):
 592   Fix a bug in the nest limit checker being too aggressive.
 593
 594
 595 0.2.7 (2018-03-07)
 596 ==================
 597 This release includes a ground-up rewrite of the regex-syntax crate, which has
 598 been in development for over a year.
 599
 600 New features:
 601
 602 * Error messages for invalid regexes have been greatly improved. You get these
 603   automatically; you don't need to do anything. In addition to better
 604   formatting, error messages will now explicitly call out the use of look
 605   around. When regex 1.0 is released, this will happen for backreferences as
 606   well.
 607 * Full support for intersection, difference and symmetric difference of
 608   character classes. These can be used via the `&&`, `--` and `~~` binary
 609   operators within classes.
 610 * A Unicode Level 1 conformat implementation of `\p{..}` character classes.
 611   Things like `\p{scx:Hira}`, `\p{age:3.2}` or `\p{Changes_When_Casefolded}`
 612   now work. All property name and value aliases are supported, and properties
 613   are selected via loose matching. e.g., `\p{Greek}` is the same as
 614   `\p{G r E e K}`.
 615 * A new `UNICODE.md` document has been added to this repository that
 616   exhaustively documents support for UTS#18.
 617 * Empty sub-expressions are now permitted in most places. That is, `()+` is
 618   now a valid regex.
 619 * Almost everything in regex-syntax now uses constant stack space, even when
 620   performing anaylsis that requires structural induction. This reduces the risk
 621   of a user provided regular expression causing a stack overflow.
 622 * [FEATURE #174](https://github.com/rust-lang/regex/issues/174):
 623   The `Ast` type in `regex-syntax` now contains span information.
 624 * [FEATURE #424](https://github.com/rust-lang/regex/issues/424):
 625   Support `\u`, `\u{...}`, `\U` and `\U{...}` syntax for specifying code points
 626   in a regular expression.
 627 * [FEATURE #449](https://github.com/rust-lang/regex/pull/449):
 628   Add a `Replace::by_ref` adapter for use of a replacer without consuming it.
 629
 630 Bug fixes:
 631
 632 * [BUG #446](https://github.com/rust-lang/regex/issues/446):
 633   We re-enable the Boyer-Moore literal matcher.
 634
 635
 636 0.2.6 (2018-02-08)
 637 ==================
 638 Bug fixes:
 639
 640 * [BUG #446](https://github.com/rust-lang/regex/issues/446):
 641   Fixes a bug in the new Boyer-Moore searcher that results in a match failure.
 642   We fix this bug by temporarily disabling Boyer-Moore.
 643
 644
 645 0.2.5 (2017-12-30)
 646 ==================
 647 Bug fixes:
 648
 649 * [BUG #437](https://github.com/rust-lang/regex/issues/437):
 650   Fixes a bug in the new Boyer-Moore searcher that results in a panic.
 651
 652
 653 0.2.4 (2017-12-30)
 654 ==================
 655 New features:
 656
 657 * [FEATURE #348](https://github.com/rust-lang/regex/pull/348):
 658   Improve performance for capture searches on anchored regex.
 659   (Contributed by @ethanpailes. Nice work!)
 660 * [FEATURE #419](https://github.com/rust-lang/regex/pull/419):
 661   Expand literal searching to include Tuned Boyer-Moore in some cases.
 662   (Contributed by @ethanpailes. Nice work!)
 663
 664 Bug fixes:
 665
 666 * [BUG](https://github.com/rust-lang/regex/pull/436):
 667   The regex compiler plugin has been removed.
 668 * [BUG](https://github.com/rust-lang/regex/pull/436):
 669   `simd` has been bumped to `0.2.1`, which fixes a Rust nightly build error.
 670 * [BUG](https://github.com/rust-lang/regex/pull/436):
 671   Bring the benchmark harness up to date.
 672
 673
 674 0.2.3 (2017-11-30)
 675 ==================
 676 New features:
 677
 678 * [FEATURE #374](https://github.com/rust-lang/regex/pull/374):
 679   Add `impl From<Match> for &str`.
 680 * [FEATURE #380](https://github.com/rust-lang/regex/pull/380):
 681   Derive `Clone` and `PartialEq` on `Error`.
 682 * [FEATURE #400](https://github.com/rust-lang/regex/pull/400):
 683   Update to Unicode 10.
 684
 685 Bug fixes:
 686
 687 * [BUG #375](https://github.com/rust-lang/regex/issues/375):
 688   Fix a bug that prevented the bounded backtracker from terminating.
 689 * [BUG #393](https://github.com/rust-lang/regex/issues/393),
 690   [BUG #394](https://github.com/rust-lang/regex/issues/394):
 691   Fix bug with `replace` methods for empty matches.
 692
 693
 694 0.2.2 (2017-05-21)
 695 ==================
 696 New features:
 697
 698 * [FEATURE #341](https://github.com/rust-lang/regex/issues/341):
 699   Support nested character classes and intersection operation.
 700   For example, `[\p{Greek}&&\pL]` matches greek letters and
 701   `[[0-9]&&[^4]]` matches every decimal digit except `4`.
 702   (Much thanks to @robinst, who contributed this awesome feature.)
 703
 704 Bug fixes:
 705
 706 * [BUG #321](https://github.com/rust-lang/regex/issues/321):
 707   Fix bug in literal extraction and UTF-8 decoding.
 708 * [BUG #326](https://github.com/rust-lang/regex/issues/326):
 709   Add documentation tip about the `(?x)` flag.
 710 * [BUG #333](https://github.com/rust-lang/regex/issues/333):
 711   Show additional replacement example using curly braces.
 712 * [BUG #334](https://github.com/rust-lang/regex/issues/334):
 713   Fix bug when resolving captures after a match.
 714 * [BUG #338](https://github.com/rust-lang/regex/issues/338):
 715   Add example that uses `Captures::get` to API documentation.
 716 * [BUG #353](https://github.com/rust-lang/regex/issues/353):
 717   Fix RegexSet bug that caused match failure in some cases.
 718 * [BUG #354](https://github.com/rust-lang/regex/pull/354):
 719   Fix panic in parser when `(?x)` is used.
 720 * [BUG #358](https://github.com/rust-lang/regex/issues/358):
 721   Fix literal optimization bug with RegexSet.
 722 * [BUG #359](https://github.com/rust-lang/regex/issues/359):
 723   Fix example code in README.
 724 * [BUG #365](https://github.com/rust-lang/regex/pull/365):
 725   Fix bug in `rure_captures_len` in the C binding.
 726 * [BUG #367](https://github.com/rust-lang/regex/issues/367):
 727   Fix byte class bug that caused a panic.
 728
 729
 730 0.2.1
 731 =====
 732 One major bug with `replace_all` has been fixed along with a couple of other
 733 touchups.
 734
 735 * [BUG #312](https://github.com/rust-lang/regex/issues/312):
 736   Fix documentation for `NoExpand` to reference correct lifetime parameter.
 737 * [BUG #314](https://github.com/rust-lang/regex/issues/314):
 738   Fix a bug with `replace_all` when replacing a match with the empty string.
 739 * [BUG #316](https://github.com/rust-lang/regex/issues/316):
 740   Note a missing breaking change from the `0.2.0` CHANGELOG entry.
 741   (`RegexBuilder::compile` was renamed to `RegexBuilder::build`.)
 742 * [BUG #324](https://github.com/rust-lang/regex/issues/324):
 743   Compiling `regex` should only require one version of `memchr` crate.
 744
 745
 746 0.2.0
 747 =====
 748 This is a new major release of the regex crate, and is an implementation of the
 749 [regex 1.0 RFC](https://github.com/rust-lang/rfcs/blob/master/text/1620-regex-1.0.md).
 750 We are releasing a `0.2` first, and if there are no major problems, we will
 751 release a `1.0` shortly. For `0.2`, the minimum *supported* Rust version is
 752 1.12.
 753
 754 There are a number of **breaking changes** in `0.2`. They are split into two
 755 types. The first type correspond to breaking changes in regular expression
 756 syntax. The second type correspond to breaking changes in the API.
 757
 758 Breaking changes for regex syntax:
 759
 760 * POSIX character classes now require double bracketing. Previously, the regex
 761   `[:upper:]` would parse as the `upper` POSIX character class. Now it parses
 762   as the character class containing the characters `:upper:`. The fix to this
 763   change is to use `[[:upper:]]` instead. Note that variants like
 764   `[[:upper:][:blank:]]` continue to work.
 765 * The character `[` must always be escaped inside a character class.
 766 * The characters `&`, `-` and `~` must be escaped if any one of them are
 767   repeated consecutively. For example, `[&]`, `[\&]`, `[\&\&]`, `[&-&]` are all
 768   equivalent while `[&&]` is illegal. (The motivation for this and the prior
 769   change is to provide a backwards compatible path for adding character class
 770   set notation.)
 771 * A `bytes::Regex` now has Unicode mode enabled by default (like the main
 772   `Regex` type). This means regexes compiled with `bytes::Regex::new` that
 773   don't have the Unicode flag set should add `(?-u)` to recover the original
 774   behavior.
 775
 776 Breaking changes for the regex API:
 777
 778 * `find` and `find_iter` now **return `Match` values instead of
 779   `(usize, usize)`.** `Match` values have `start` and `end` methods, which
 780   return the match offsets. `Match` values also have an `as_str` method,
 781   which returns the text of the match itself.
 782 * The `Captures` type now only provides a single iterator over all capturing
 783   matches, which should replace uses of `iter` and `iter_pos`. Uses of
 784   `iter_named` should use the `capture_names` method on `Regex`.
 785 * The `at` method on the `Captures` type has been renamed to `get`, and it
 786   now returns a `Match`. Similarly, the `name` method on `Captures` now returns
 787   a `Match`.
 788 * The `replace` methods now return `Cow` values. The `Cow::Borrowed` variant
 789   is returned when no replacements are made.
 790 * The `Replacer` trait has been completely overhauled. This should only
 791   impact clients that implement this trait explicitly. Standard uses of
 792   the `replace` methods should continue to work unchanged. If you implement
 793   the `Replacer` trait, please consult the new documentation.
 794 * The `quote` free function has been renamed to `escape`.
 795 * The `Regex::with_size_limit` method has been removed. It is replaced by
 796   `RegexBuilder::size_limit`.
 797 * The `RegexBuilder` type has switched from owned `self` method receivers to
 798   `&mut self` method receivers. Most uses will continue to work unchanged, but
 799   some code may require naming an intermediate variable to hold the builder.
 800 * The `compile` method on `RegexBuilder` has been renamed to `build`.
 801 * The free `is_match` function has been removed. It is replaced by compiling
 802   a `Regex` and calling its `is_match` method.
 803 * The `PartialEq` and `Eq` impls on `Regex` have been dropped. If you relied
 804   on these impls, the fix is to define a wrapper type around `Regex`, impl
 805   `Deref` on it and provide the necessary impls.
 806 * The `is_empty` method on `Captures` has been removed. This always returns
 807   `false`, so its use is superfluous.
 808 * The `Syntax` variant of the `Error` type now contains a string instead of
 809   a `regex_syntax::Error`. If you were examining syntax errors more closely,
 810   you'll need to explicitly use the `regex_syntax` crate to re-parse the regex.
 811 * The `InvalidSet` variant of the `Error` type has been removed since it is
 812   no longer used.
 813 * Most of the iterator types have been renamed to match conventions. If you
 814   were using these iterator types explicitly, please consult the documentation
 815   for its new name. For example, `RegexSplits` has been renamed to `Split`.
 816
 817 A number of bugs have been fixed:
 818
 819 * [BUG #151](https://github.com/rust-lang/regex/issues/151):
 820   The `Replacer` trait has been changed to permit the caller to control
 821   allocation.
 822 * [BUG #165](https://github.com/rust-lang/regex/issues/165):
 823   Remove the free `is_match` function.
 824 * [BUG #166](https://github.com/rust-lang/regex/issues/166):
 825   Expose more knobs (available in `0.1`) and remove `with_size_limit`.
 826 * [BUG #168](https://github.com/rust-lang/regex/issues/168):
 827   Iterators produced by `Captures` now have the correct lifetime parameters.
 828 * [BUG #175](https://github.com/rust-lang/regex/issues/175):
 829   Fix a corner case in the parsing of POSIX character classes.
 830 * [BUG #178](https://github.com/rust-lang/regex/issues/178):
 831   Drop the `PartialEq` and `Eq` impls on `Regex`.
 832 * [BUG #179](https://github.com/rust-lang/regex/issues/179):
 833   Remove `is_empty` from `Captures` since it always returns false.
 834 * [BUG #276](https://github.com/rust-lang/regex/issues/276):
 835   Position of named capture can now be retrieved from a `Captures`.
 836 * [BUG #296](https://github.com/rust-lang/regex/issues/296):
 837   Remove winapi/kernel32-sys dependency on UNIX.
 838 * [BUG #307](https://github.com/rust-lang/regex/issues/307):
 839   Fix error on emscripten.
 840
 841
 842 0.1.80
 843 ======
 844 * [PR #292](https://github.com/rust-lang/regex/pull/292):
 845   Fixes bug #291, which was introduced by PR #290.
 846
 847 0.1.79
 848 ======
 849 * Require regex-syntax 0.3.8.
 850
 851 0.1.78
 852 ======
 853 * [PR #290](https://github.com/rust-lang/regex/pull/290):
 854   Fixes bug #289, which caused some regexes with a certain combination
 855   of literals to match incorrectly.
 856
 857 0.1.77
 858 ======
 859 * [PR #281](https://github.com/rust-lang/regex/pull/281):
 860   Fixes bug #280 by disabling all literal optimizations when a pattern
 861   is partially anchored.
 862
 863 0.1.76
 864 ======
 865 * Tweak criteria for using the Teddy literal matcher.
 866
 867 0.1.75
 868 ======
 869 * [PR #275](https://github.com/rust-lang/regex/pull/275):
 870   Improves match verification performance in the Teddy SIMD searcher.
 871 * [PR #278](https://github.com/rust-lang/regex/pull/278):
 872   Replaces slow substring loop in the Teddy SIMD searcher with Aho-Corasick.
 873 * Implemented DoubleEndedIterator on regex set match iterators.
 874
 875 0.1.74
 876 ======
 877 * Release regex-syntax 0.3.5 with a minor bug fix.
 878 * Fix bug #272.
 879 * Fix bug #277.
 880 * [PR #270](https://github.com/rust-lang/regex/pull/270):
 881   Fixes bugs #264, #268 and an unreported where the DFA cache size could be
 882   drastically under estimated in some cases (leading to high unexpected memory
 883   usage).
 884
 885 0.1.73
 886 ======
 887 * Release `regex-syntax 0.3.4`.
 888 * Bump `regex-syntax` dependency version for `regex` to `0.3.4`.
 889
 890 0.1.72
 891 ======
 892 * [PR #262](https://github.com/rust-lang/regex/pull/262):
 893   Fixes a number of small bugs caught by fuzz testing (AFL).
 894
 895 0.1.71
 896 ======
 897 * [PR #236](https://github.com/rust-lang/regex/pull/236):
 898   Fix a bug in how suffix literals were extracted, which could lead
 899   to invalid match behavior in some cases.
 900
 901 0.1.70
 902 ======
 903 * [PR #231](https://github.com/rust-lang/regex/pull/231):
 904   Add SIMD accelerated multiple pattern search.
 905 * [PR #228](https://github.com/rust-lang/regex/pull/228):
 906   Reintroduce the reverse suffix literal optimization.
 907 * [PR #226](https://github.com/rust-lang/regex/pull/226):
 908   Implements NFA state compression in the lazy DFA.
 909 * [PR #223](https://github.com/rust-lang/regex/pull/223):
 910   A fully anchored RegexSet can now short-circuit.
 911
 912 0.1.69
 913 ======
 914 * [PR #216](https://github.com/rust-lang/regex/pull/216):
 915   Tweak the threshold for running backtracking.
 916 * [PR #217](https://github.com/rust-lang/regex/pull/217):
 917   Add upper limit (from the DFA) to capture search (for the NFA).
 918 * [PR #218](https://github.com/rust-lang/regex/pull/218):
 919   Add rure, a C API.
 920
 921 0.1.68
 922 ======
 923 * [PR #210](https://github.com/rust-lang/regex/pull/210):
 924   Fixed a performance bug in `bytes::Regex::replace` where `extend` was used
 925   instead of `extend_from_slice`.
 926 * [PR #211](https://github.com/rust-lang/regex/pull/211):
 927   Fixed a bug in the handling of word boundaries in the DFA.
 928 * [PR #213](https://github.com/rust-lang/pull/213):
 929   Added RE2 and Tcl to the benchmark harness. Also added a CLI utility from
 930   running regexes using any of the following regex engines: PCRE1, PCRE2,
 931   Oniguruma, RE2, Tcl and of course Rust's own regexes.
 932
 933 0.1.67
 934 ======
 935 * [PR #201](https://github.com/rust-lang/regex/pull/201):
 936   Fix undefined behavior in the `regex!` compiler plugin macro.
 937 * [PR #205](https://github.com/rust-lang/regex/pull/205):
 938   More improvements to DFA performance. Competitive with RE2. See PR for
 939   benchmarks.
 940 * [PR #209](https://github.com/rust-lang/regex/pull/209):
 941   Release 0.1.66 was semver incompatible since it required a newer version
 942   of Rust than previous releases. This PR fixes that. (And `0.1.66` was
 943   yanked.)
 944
 945 0.1.66
 946 ======
 947 * Speculative support for Unicode word boundaries was added to the DFA. This
 948   should remove the last common case that disqualified use of the DFA.
 949 * An optimization that scanned for suffix literals and then matched the regular
 950   expression in reverse was removed because it had worst case quadratic time
 951   complexity. It was replaced with a more limited optimization where, given any
 952   regex of the form `re$`, it will be matched in reverse from the end of the
 953   haystack.
 954 * [PR #202](https://github.com/rust-lang/regex/pull/202):
 955   The inner loop of the DFA was heavily optimized to improve cache locality
 956   and reduce the overall number of instructions run on each iteration. This
 957   represents the first use of `unsafe` in `regex` (to elide bounds checks).
 958 * [PR #200](https://github.com/rust-lang/regex/pull/200):
 959   Use of the `mempool` crate (which used thread local storage) was replaced
 960   with a faster version of a similar API in @Amanieu's `thread_local` crate.
 961   It should reduce contention when using a regex from multiple threads
 962   simultaneously.
 963 * PCRE2 JIT benchmarks were added. A benchmark comparison can be found
 964   [here](https://gist.github.com/anonymous/14683c01993e91689f7206a18675901b).
 965   (Includes a comparison with PCRE1's JIT and Oniguruma.)
 966 * A bug where word boundaries weren't being matched correctly in the DFA was
 967   fixed. This only affected use of `bytes::Regex`.
 968 * [#160](https://github.com/rust-lang/regex/issues/160):
 969   `Captures` now has a `Debug` impl.