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:
We adopt Rust 1.20 as the new minimum supported version of Rust for regex.
We also tentativley adopt a policy that permits bumping the minimum supported
version of Rust in minor version releases of regex, but no patch releases.
That is, with respect to semver, we do not strictly consider bumping the
minimum version of Rust to be a breaking change, but adopt a conservative
stance as a compromise.
Octal syntax in regular expressions has been disabled by default. This
permits better error messages that inform users that backreferences aren't
available. Octal syntax can be re-enabled via the corresponding option on
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.
The From<regex_syntax::Error> impl has been removed. This formally removes
the public dependency on regex-syntax.
A new feature, 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.
This releases fixes a bug when building regex with only the unicode-perl
feature. It turns out that while CI was building this configuration, it wasn't
actually failing the overall build on a failed compilation.
[BUG #769](rust-lang/regex#769):
Fix build in regex-syntax when only the unicode-perl feature is enabled.
1.5.2 (2021-05-01)
This release fixes a performance bug when Unicode word boundaries are used.
Namely, for certain regexes on certain inputs, it's possible for the lazy DFA
to stop searching (causing a fallback to a slower engine) when it doesn't
actually need to.
This is a patch release that fixes a compilation error when the perf-literal
feature is not enabled.
1.5.0 (2021-04-30)
This release primarily updates to Rust 2018 (finally) and bumps the MSRV to
Rust 1.41 (from Rust 1.28). Rust 1.41 was chosen because it's still reasonably
old, and is what's in Debian stable at the time of writing.
This release also drops this crate's own bespoke substring search algorithms
in favor of a new
memmem implementation provided by the memchr crate.
This will change the performance profile of some regexes, sometimes getting a
little worse, and hopefully more frequently, getting a lot better. Please
report any serious performance regressions if you find them.
1.4.6 (2021-04-22)
This is a small patch release that fixes the compiler's size check on how much
heap memory a regex uses. Previously, the compiler did not account for the
heap usage of Unicode character classes. Now it does. It's possible that this
may make some regexes fail to compile that previously did compile. If that
happens, please file an issue.
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Bumps regex from 0.2.11 to 1.5.3.
Release notes
Sourced from regex's releases.
Changelog
Sourced from regex's changelog.
... (truncated)
Commits
26c8d8e
1.5.35f55718
deps: bump to regex-syntax 0.6.253ea9e3e
regex-syntax-0.6.259085949
changelog: 1.5.3a8554b3
syntax: fix compilation errors with unicode-perl0abcada
ci: test scripts should fail on errors2393c55
1.5.2eb00965
changelog: 1.5.2036ce80
compiler: fix lazy DFA false quits on ASCII text374c168
1.5.1Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
@dependabot rebase
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