This release updates this crate to Unicode 13.
New features:
regex-syntax
to Unicode 13.This is a small bug fix release that fixes a bug related to the scoping of flags in a regex. Namely, before this fix, a regex like ((?i)a)b)
would match aB
despite the fact that b
should not be matched case insensitively.
Bug fixes:
This is a small maintenance release that upgrades the dependency on thread_local
from 0.3
to 1.0
. The minimum supported Rust version remains at Rust 1.28.
This is a small maintenance release with some house cleaning and bug fixes.
New features:
Match::range
method an a From<Match> for Range
impl.Bug fixes:
/-/.splitn("a", 2)
to return ["a"]
instead of ["a", ""]
.\p\
./-/.split("a-")
to return ["a", ""]
instead of ["a"]
.std::error::Error::description
method.This is a maintenance release with no changes in order to try to work-around a docs.rs/Cargo issue.
This release adds a plethora of new crate features that permit users of regex to shrink its size considerably, in exchange for giving up either functionality (such as Unicode support) or runtime performance. When all such features are disabled, the dependency tree for regex
shrinks to exactly 1 crate (regex-syntax
). More information about the new crate features can be found in the docs.
Note that while this is a new minor version release, the minimum supported Rust version for this crate remains at 1.28.0
.
New features:
use_std
feature has been deprecated in favor of the std
feature. The use_std
feature will be removed in regex 2. Until then, use_std
will remain as an alias for the std
feature.regex
.This release does a bit of house cleaning. Namely:
regex
crate, and is now part of the aho-corasick
crate. See aho-corasick
's new packed
sub-module for details.utf8-ranges
crate has been deprecated, with its functionality moving into the utf8
sub-module of regex-syntax
.ucd-util
dependency has been dropped, in favor of implementing what little we need inside of regex-syntax
itself.In general, this is part of an ongoing (long term) effort to make optimizations in the regex engine easier to reason about. The current code is too convoluted and thus it is very easy to introduce new bugs. This simplification effort is the primary motivation behind re-working the aho-corasick
crate to not only bundle algorithms like Teddy, but to also provide regex-like match semantics automatically.
Moving forward, the plan is to join up with the bstr
and regex-automata
crates, with the former providing more sophisticated substring search algorithms (thereby deleting existing code in regex
) and the latter providing ahead-of-time compiled DFAs for cases where they are inexpensive to compute.
This release updates regex‘s minimum supported Rust version to 1.28, which was release almost 1 year ago. This release also updates regex’s Unicode data tables to 12.1.0.
This release contains a bug fix that caused regex's tests to fail, due to a dependency on an unreleased behavior in regex-syntax.
This release contains a few small internal refactorings. One of which fixes an instance of undefined behavior in a part of the SIMD code.
Bug fixes:
This release fixes up a few warnings as a result of recent deprecations.
This release fixes a regression introduced by a bug fix (for BUG #557) which could cause the regex engine to enter an infinite loop. This bug was originally reported against ripgrep.
This release fixes a bug in regex‘s dependency specification where it requires a newer version of regex-syntax, but this wasn’t communicated correctly in the Cargo.toml. This would have been caught by a minimal version check, but this check was disabled because the rand
crate itself advertises incorrect dependency specifications.
Bug fixes:
This release fixes a backwards compatibility regression where Regex was no longer UnwindSafe. This was caused by the upgrade to aho-corasick 0.7, whose AhoCorasick type was itself not UnwindSafe. This has been fixed in aho-corasick 0.7.4, which we now require.
Bug fixes:
This releases fixes a few bugs and adds a performance improvement when a regex is a simple alternation of literals.
Performance improvements:
aho-corasick
to 0.7 and uses it for foo|bar|...|quux
regexes.Bug fixes:
((?x))
.(?m){1,1}
.This release fixes a bug found in the fix introduced in 1.1.1.
Bug fixes:
This is a small release with one fix for a bug caused by literal optimizations.
Bug fixes:
This is a small release with a couple small enhancements. This release also increases the minimal supported Rust version (MSRV) to 1.24.1 (from 1.20.0). In accordance with this crate's MSRV policy, this release bumps the minor version number.
Performance improvements:
New features:
Bug fixes:
This is a small release.
Performance improvements:
Bug fixes:
[[:blank:]]
class that regressed in regex-syntax 0.5
.This is a small release with an API enhancement.
New features:
Replacer
trait.This is a small release that bumps the quickcheck dependency.
This is a small bug fix release.
Bug fixes:
This release exposes some new lower level APIs on Regex
that permit amortizing allocation and controlling the location at which a search is performed in a more granular way. Most users of the regex crate will not need or want to use these APIs.
New features:
Bug fixes:
RegexBuilder::dot_matches_new_line
.Parser::allow_invalid_utf8
in the regex-syntax
crate.This release upgrades regex's Unicode tables to Unicode 11, and enables SIMD optimizations automatically on Rust stable (1.27 or newer).
New features:
size_hint
on RegexSet
match iterators.Bug fixes:
use_std
feature isn't used.This release marks the 1.0 release of regex.
While this release includes some breaking changes, most users of older versions of the regex library should be able to migrate to 1.0 by simply bumping the version number. The important changes are as follows:
RegexBuilder
.(?-u:\B)
is no longer allowed in Unicode regexes since it can match at invalid UTF-8 code unit boundaries. (?-u:\b)
is still allowed in Unicode regexes.From<regex_syntax::Error>
impl has been removed. This formally removes the public dependency on regex-syntax
.use_std
, has been added and enabled by default. Disabling the feature will result in a compilation error. In the future, this may permit us to support no_std
environments (w/ alloc
) in a backwards compatible way.For more information and discussion, please see 1.0 release tracking issue.
This release primarily contains bug fixes. Some of them resolve bugs where the parser could panic.
New features:
Bug fixes:
[\d-a]
.\n
character.(?flags)
.\pC
was not recognized as an alias for \p{Other}
.This release primarily updates the regex crate to changes made in std::arch
on nightly Rust.
New features:
Hir
type in regex-syntax
now has a printer.This release introduces a new nightly only feature, unstable
, which enables SIMD optimizations for certain types of regexes. No additional compile time options are necessary, and the regex crate will automatically choose the best CPU features at run time. As a result, the simd
(nightly only) crate dependency has been dropped.
New features:
Bug fixes:
(?x)[ / - ]
failed to parse.Bug gixes:
This release includes a ground-up rewrite of the regex-syntax crate, which has been in development for over a year.
New features:
&&
, --
and ~~
binary operators within classes.\p{..}
character classes. Things like \p{scx:Hira}
, \p{age:3.2}
or \p{Changes_When_Casefolded}
now work. All property name and value aliases are supported, and properties are selected via loose matching. e.g., \p{Greek}
is the same as \p{G r E e K}
.UNICODE.md
document has been added to this repository that exhaustively documents support for UTS#18.()+
is now a valid regex.Ast
type in regex-syntax
now contains span information.\u
, \u{...}
, \U
and \U{...}
syntax for specifying code points in a regular expression.Replace::by_ref
adapter for use of a replacer without consuming it.Bug fixes:
Bug fixes:
Bug fixes:
New features:
Bug fixes:
simd
has been bumped to 0.2.1
, which fixes a Rust nightly build error.New features:
impl From<Match> for &str
.Clone
and PartialEq
on Error
.Bug fixes:
replace
methods for empty matches.New features:
[\p{Greek}&&\pL]
matches greek letters and [[0-9]&&[^4]]
matches every decimal digit except 4
. (Much thanks to @robinst, who contributed this awesome feature.)Bug fixes:
(?x)
flag.Captures::get
to API documentation.(?x)
is used.rure_captures_len
in the C binding.One major bug with replace_all
has been fixed along with a couple of other touchups.
NoExpand
to reference correct lifetime parameter.replace_all
when replacing a match with the empty string.0.2.0
CHANGELOG entry. (RegexBuilder::compile
was renamed to RegexBuilder::build
.)regex
should only require one version of memchr
crate.This is a new major release of the regex crate, and is an implementation of the regex 1.0 RFC. We are releasing a 0.2
first, and if there are no major problems, we will release a 1.0
shortly. For 0.2
, the minimum supported Rust version is 1.12.
There are a number of breaking changes in 0.2
. They are split into two types. The first type correspond to breaking changes in regular expression syntax. The second type correspond to breaking changes in the API.
Breaking changes for regex syntax:
[:upper:]
would parse as the upper
POSIX character class. Now it parses as the character class containing the characters :upper:
. The fix to this change is to use [[:upper:]]
instead. Note that variants like [[:upper:][:blank:]]
continue to work.[
must always be escaped inside a character class.&
, -
and ~
must be escaped if any one of them are repeated consecutively. For example, [&]
, [\&]
, [\&\&]
, [&-&]
are all equivalent while [&&]
is illegal. (The motivation for this and the prior change is to provide a backwards compatible path for adding character class set notation.)bytes::Regex
now has Unicode mode enabled by default (like the main Regex
type). This means regexes compiled with bytes::Regex::new
that don't have the Unicode flag set should add (?-u)
to recover the original behavior.Breaking changes for the regex API:
find
and find_iter
now return Match
values instead of (usize, usize)
. Match
values have start
and end
methods, which return the match offsets. Match
values also have an as_str
method, which returns the text of the match itself.Captures
type now only provides a single iterator over all capturing matches, which should replace uses of iter
and iter_pos
. Uses of iter_named
should use the capture_names
method on Regex
.at
method on the Captures
type has been renamed to get
, and it now returns a Match
. Similarly, the name
method on Captures
now returns a Match
.replace
methods now return Cow
values. The Cow::Borrowed
variant is returned when no replacements are made.Replacer
trait has been completely overhauled. This should only impact clients that implement this trait explicitly. Standard uses of the replace
methods should continue to work unchanged. If you implement the Replacer
trait, please consult the new documentation.quote
free function has been renamed to escape
.Regex::with_size_limit
method has been removed. It is replaced by RegexBuilder::size_limit
.RegexBuilder
type has switched from owned self
method receivers to &mut self
method receivers. Most uses will continue to work unchanged, but some code may require naming an intermediate variable to hold the builder.compile
method on RegexBuilder
has been renamed to build
.is_match
function has been removed. It is replaced by compiling a Regex
and calling its is_match
method.PartialEq
and Eq
impls on Regex
have been dropped. If you relied on these impls, the fix is to define a wrapper type around Regex
, impl Deref
on it and provide the necessary impls.is_empty
method on Captures
has been removed. This always returns false
, so its use is superfluous.Syntax
variant of the Error
type now contains a string instead of a regex_syntax::Error
. If you were examining syntax errors more closely, you'll need to explicitly use the regex_syntax
crate to re-parse the regex.InvalidSet
variant of the Error
type has been removed since it is no longer used.RegexSplits
has been renamed to Split
.A number of bugs have been fixed:
Replacer
trait has been changed to permit the caller to control allocation.is_match
function.0.1
) and remove with_size_limit
.Captures
now have the correct lifetime parameters.PartialEq
and Eq
impls on Regex
.is_empty
from Captures
since it always returns false.Captures
.regex-syntax 0.3.4
.regex-syntax
dependency version for regex
to 0.3.4
.bytes::Regex::replace
where extend
was used instead of extend_from_slice
.regex!
compiler plugin macro.0.1.66
was yanked.)re$
, it will be matched in reverse from the end of the haystack.unsafe
in regex
(to elide bounds checks).mempool
crate (which used thread local storage) was replaced with a faster version of a similar API in @Amanieu's thread_local
crate. It should reduce contention when using a regex from multiple threads simultaneously.bytes::Regex
.Captures
now has a Debug
impl.