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.