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Unexpected SetMatches::len() behavior #625

Closed
EFanZh opened this issue Oct 29, 2019 · 4 comments
Closed

Unexpected SetMatches::len() behavior #625

EFanZh opened this issue Oct 29, 2019 · 4 comments
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doc fix-incoming

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@EFanZh
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EFanZh commented Oct 29, 2019 •
edited

The document explains SetMatches::len() as “the total number of regexes in the set that created these matches”.

At first sight, I thought SetMatches as a collection of matched regular expression indices, so naturally, I expect the following function to always return true:

fn f(s: &SetMatches) -> bool {
    s.len() == s.iter().count()
}

But it seems that this method always returns the number of all regular expressions in the corresponding RegexSet object, not the number of matched regular expressions.

I think the name of len() strongly suggests that it is consistent with the behavior of iter(), maybe it’s better to rename this method or add a better explanation to reduce confusion.
@BurntSushi
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I probably agree that len and iter should be consistent. But I'm not going to rename it since this change on its own is not worth a breaking change release. I think just adding better docs is good enough here.

@BurntSushi BurntSushi added the doc label Oct 29, 2019
@BurntSushi
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In looking over past issues, I stumbled on this one and realized that there is no iter() method. So the premise of the problem described in this issue seems wrong.

@BurntSushi BurntSushi added invalid and removed doc labels Jul 19, 2021
@EFanZh
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EFanZh commented Jul 23, 2021

I see there is a SetMatches::iter method: https://docs.rs/regex/1.5.4/regex/struct.SetMatches.html#method.iter.

@BurntSushi
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Oh, whoops. I did not re-read the issue closely enough.

I think the fix here is to clarify the docs. If I could do it over, I'd choose different names.

@BurntSushi BurntSushi added doc and removed invalid labels Jul 23, 2021
@BurntSushi BurntSushi reopened this Aug 9, 2021
BurntSushi added a commit that referenced this issue Mar 6, 2023
@BurntSushi
doc: clarify meaning of SetMatches::len
6bc1c64 
It is really unfortunate, but SetMatches::len and
SetMatcher::iter().count() do not correspond go the same thing. It's not
clear why I even added the SetMatches::len method in the first place,
but it always returns the number of regexes in the set, and not the
number of regexes that matched.

We can't change the name (or remove the method) obviously, but we do add
a warning to the docs.

Fixes #625
BurntSushi added a commit that referenced this issue Mar 15, 2023
@BurntSushi
doc: clarify meaning of SetMatches::len
df96a05 
It is really unfortunate, but SetMatches::len and
SetMatcher::iter().count() do not correspond go the same thing. It's not
clear why I even added the SetMatches::len method in the first place,
but it always returns the number of regexes in the set, and not the
number of regexes that matched.

We can't change the name (or remove the method) obviously, but we do add
a warning to the docs.

Fixes #625
BurntSushi added a commit that referenced this issue Mar 15, 2023
@BurntSushi
doc: clarify meaning of SetMatches::len
3374053 
It is really unfortunate, but SetMatches::len and
SetMatcher::iter().count() do not correspond go the same thing. It's not
clear why I even added the SetMatches::len method in the first place,
but it always returns the number of regexes in the set, and not the
number of regexes that matched.

We can't change the name (or remove the method) obviously, but we do add
a warning to the docs.

Fixes #625
BurntSushi added a commit that referenced this issue Mar 15, 2023
@BurntSushi
doc: clarify meaning of SetMatches::len
b3f8e00 
It is really unfortunate, but SetMatches::len and
SetMatcher::iter().count() do not correspond go the same thing. It's not
clear why I even added the SetMatches::len method in the first place,
but it always returns the number of regexes in the set, and not the
number of regexes that matched.

We can't change the name (or remove the method) obviously, but we do add
a warning to the docs.

Fixes #625
BurntSushi added a commit that referenced this issue Mar 15, 2023
@BurntSushi
doc: clarify meaning of SetMatches::len
a70ea30 
It is really unfortunate, but SetMatches::len and
SetMatcher::iter().count() do not correspond go the same thing. It's not
clear why I even added the SetMatches::len method in the first place,
but it always returns the number of regexes in the set, and not the
number of regexes that matched.

We can't change the name (or remove the method) obviously, but we do add
a warning to the docs.

Fixes #625
BurntSushi added a commit that referenced this issue Mar 15, 2023
@BurntSushi
doc: clarify meaning of SetMatches::len
8eda81f 
It is really unfortunate, but SetMatches::len and
SetMatcher::iter().count() do not correspond go the same thing. It's not
clear why I even added the SetMatches::len method in the first place,
but it always returns the number of regexes in the set, and not the
number of regexes that matched.

We can't change the name (or remove the method) obviously, but we do add
a warning to the docs.

Fixes #625
BurntSushi added a commit that referenced this issue Mar 20, 2023
@BurntSushi
doc: clarify meaning of SetMatches::len
7afc473 
It is really unfortunate, but SetMatches::len and
SetMatcher::iter().count() do not correspond go the same thing. It's not
clear why I even added the SetMatches::len method in the first place,
but it always returns the number of regexes in the set, and not the
number of regexes that matched.

We can't change the name (or remove the method) obviously, but we do add
a warning to the docs.

Fixes #625
BurntSushi added a commit that referenced this issue Mar 21, 2023
@BurntSushi
doc: clarify meaning of SetMatches::len
553095f 
It is really unfortunate, but SetMatches::len and
SetMatcher::iter().count() do not correspond go the same thing. It's not
clear why I even added the SetMatches::len method in the first place,
but it always returns the number of regexes in the set, and not the
number of regexes that matched.

We can't change the name (or remove the method) obviously, but we do add
a warning to the docs.

Fixes #625
BurntSushi added a commit that referenced this issue Apr 15, 2023
@BurntSushi
doc: clarify meaning of SetMatches::len
91cf14e 
It is really unfortunate, but SetMatches::len and
SetMatcher::iter().count() do not correspond go the same thing. It's not
clear why I even added the SetMatches::len method in the first place,
but it always returns the number of regexes in the set, and not the
number of regexes that matched.

We can't change the name (or remove the method) obviously, but we do add
a warning to the docs.

Fixes #625
BurntSushi added a commit that referenced this issue Apr 15, 2023
@BurntSushi
doc: clarify meaning of SetMatches::len
92158bf 
It is really unfortunate, but SetMatches::len and
SetMatcher::iter().count() do not correspond go the same thing. It's not
clear why I even added the SetMatches::len method in the first place,
but it always returns the number of regexes in the set, and not the
number of regexes that matched.

We can't change the name (or remove the method) obviously, but we do add
a warning to the docs.

Fixes #625
BurntSushi added a commit that referenced this issue Apr 17, 2023
@BurntSushi
doc: clarify meaning of SetMatches::len
89271de 
It is really unfortunate, but SetMatches::len and
SetMatcher::iter().count() do not correspond go the same thing. It's not
clear why I even added the SetMatches::len method in the first place,
but it always returns the number of regexes in the set, and not the
number of regexes that matched.

We can't change the name (or remove the method) obviously, but we do add
a warning to the docs.

Fixes #625
BurntSushi added a commit that referenced this issue Apr 17, 2023
@BurntSushi
doc: clarify meaning of SetMatches::len
337b3ca 
It is really unfortunate, but SetMatches::len and
SetMatcher::iter().count() do not correspond go the same thing. It's not
clear why I even added the SetMatches::len method in the first place,
but it always returns the number of regexes in the set, and not the
number of regexes that matched.

We can't change the name (or remove the method) obviously, but we do add
a warning to the docs.

Fixes #625
BurntSushi added a commit that referenced this issue Apr 17, 2023
@BurntSushi
doc: clarify meaning of SetMatches::len
da6b1e5 
It is really unfortunate, but SetMatches::len and
SetMatcher::iter().count() do not correspond go the same thing. It's not
clear why I even added the SetMatches::len method in the first place,
but it always returns the number of regexes in the set, and not the
number of regexes that matched.

We can't change the name (or remove the method) obviously, but we do add
a warning to the docs.

Fixes #625
BurntSushi added a commit that referenced this issue Apr 17, 2023
@BurntSushi
doc: clarify meaning of SetMatches::len
67a60cf 
It is really unfortunate, but SetMatches::len and
SetMatcher::iter().count() do not correspond go the same thing. It's not
clear why I even added the SetMatches::len method in the first place,
but it always returns the number of regexes in the set, and not the
number of regexes that matched.

We can't change the name (or remove the method) obviously, but we do add
a warning to the docs.

Fixes #625
BurntSushi added a commit that referenced this issue Apr 20, 2023
@BurntSushi
release: 1.8.0
1b72261 
1.8.0 (2023-04-20)
==================
This is a sizeable release that will be soon followed by another sizeable
release. Both of them will combined close over 40 existing issues and PRs.

This first release, despite its size, essentially represent preparatory work
for the second release, which will be even bigger. Namely, this release:

* Increases the MSRV to Rust 1.60.0, which was released about 1 year ago.
* Upgrades its dependency on `aho-corasick` to the recently release 1.0
version.
* Upgrades its dependency on `regex-syntax` to the simultaneously released
`0.7` version. The changes to `regex-syntax` principally revolve around a
rewrite of its literal extraction code and a number of simplifications and
optimizations to its high-level intermediate representation (HIR).

The second release, which will follow ~shortly after the release above, will
contain a soup-to-nuts rewrite of every regex engine. This will be done by
bringing [`regex-automata`](https://github.com/BurntSushi/regex-automata) into
this repository, and then changing the `regex` crate to be nothing but an API
shim layer on top of `regex-automata`'s API.

These tandem releases are the culmination of about 3
years of on-and-off work that [began in earnest in March
2020](#656).

Because of the scale of changes involved in these releases, I would love to
hear about your experience. Especially if you notice undocumented changes in
behavior or performance changes (positive *or* negative).

Most changes in the first release are listed below. For more details, please
see the commit log, which reflects a linear and decently documented history
of all changes.

New features:

* [FEATURE #501](#501):
Permit many more characters to be escaped, even if they have no significance.
More specifically, any ASCII character except for `[0-9A-Za-z<>]` can now be
escaped. Also, a new routine, `is_escapeable_character`, has been added to
`regex-syntax` to query whether a character is escapeable or not.
* [FEATURE #547](#547):
Add `Regex::captures_at`. This filles a hole in the API, but doesn't otherwise
introduce any new expressive power.
* [FEATURE #595](#595):
Capture group names are now Unicode-aware. They can now begin with either a `_`
or any "alphabetic" codepoint. After the first codepoint, subsequent codepoints
can be any sequence of alpha-numeric codepoints, along with `_`, `.`, `[` and
`]`. Note that replacement syntax has not changed.
* [FEATURE #810](#810):
Add `Match::is_empty` and `Match::len` APIs.
* [FEATURE #905](#905):
Add an `impl Default for RegexSet`, with the default being the empty set.
* [FEATURE #908](#908):
A new method, `Regex::static_captures_len`, has been added which returns the
number of capture groups in the pattern if and only if every possible match
always contains the same number of matching groups.
* [FEATURE #955](#955):
Named captures can now be written as `(?<name>re)` in addition to
`(?P<name>re)`.
* FEATURE: `regex-syntax` now supports empty character classes.
* FEATURE: `regex-syntax` now has an optional `std` feature. (This will come
to `regex` in the second release.)
* FEATURE: The `Hir` type in `regex-syntax` has had a number of simplifications
made to it.
* FEATURE: `regex-syntax` has support for a new `R` flag for enabling CRLF
mode. This will be supported in `regex` proper in the second release.
* FEATURE: `regex-syntax` now has proper support for "regex that never
matches" via `Hir::fail()`.
* FEATURE: The `hir::literal` module of `regex-syntax` has been completely
re-worked. It now has more documentation, examples and advice.
* FEATURE: The `allow_invalid_utf8` option in `regex-syntax` has been renamed
to `utf8`, and the meaning of the boolean has been flipped.

Performance improvements:

* PERF: The upgrade to `aho-corasick 1.0` may improve performance in some
cases. It's difficult to characterize exactly which patterns this might impact,
but if there are a small number of longish (>= 4 bytes) prefix literals, then
it might be faster than before.

Bug fixes:

* [BUG #514](#514):
Improve `Debug` impl for `Match` so that it doesn't show the entire haystack.
* BUGS [#516](#516),
[#731](#731):
Fix a number of issues with printing `Hir` values as regex patterns.
* [BUG #610](#610):
Add explicit example of `foo|bar` in the regex syntax docs.
* [BUG #625](#625):
Clarify that `SetMatches::len` does not (regretably) refer to the number of
matches in the set.
* [BUG #660](#660):
Clarify "verbose mode" in regex syntax documentation.
* BUG [#738](#738),
[#950](#950):
Fix `CaptureLocations::get` so that it never panics.
* [BUG #747](#747):
Clarify documentation for `Regex::shortest_match`.
* [BUG #835](#835):
Fix `\p{Sc}` so that it is equivalent to `\p{Currency_Symbol}`.
* [BUG #846](#846):
Add more clarifying documentation to the `CompiledTooBig` error variant.
* [BUG #854](#854):
Clarify that `regex::Regex` searches as if the haystack is a sequence of
Unicode scalar values.
* [BUG #884](#884):
Replace `__Nonexhaustive` variants with `#[non_exhaustive]` attribute.
* [BUG #893](#893):
Optimize case folding since it can get quite slow in some pathological cases.
* [BUG #895](#895):
Reject `(?-u:\W)` in `regex::Regex` APIs.
* [BUG #942](#942):
Add a missing `void` keyword to indicate "no parameters" in C API.
* [BUG #965](#965):
Fix `\p{Lc}` so that it is equivalent to `\p{Cased_Letter}`.
* [BUG #975](#975):
Clarify documentation for `\pX` syntax.
@BurntSushi BurntSushi mentioned this issue Apr 20, 2023
Merged
BurntSushi added a commit that referenced this issue Apr 20, 2023
@BurntSushi
release: 1.8.0
070374f 
1.8.0 (2023-04-20)
==================
This is a sizeable release that will be soon followed by another sizeable
release. Both of them will combined close over 40 existing issues and PRs.

This first release, despite its size, essentially represent preparatory work
for the second release, which will be even bigger. Namely, this release:

* Increases the MSRV to Rust 1.60.0, which was released about 1 year ago.
* Upgrades its dependency on `aho-corasick` to the recently release 1.0
version.
* Upgrades its dependency on `regex-syntax` to the simultaneously released
`0.7` version. The changes to `regex-syntax` principally revolve around a
rewrite of its literal extraction code and a number of simplifications and
optimizations to its high-level intermediate representation (HIR).

The second release, which will follow ~shortly after the release above, will
contain a soup-to-nuts rewrite of every regex engine. This will be done by
bringing [`regex-automata`](https://github.com/BurntSushi/regex-automata) into
this repository, and then changing the `regex` crate to be nothing but an API
shim layer on top of `regex-automata`'s API.

These tandem releases are the culmination of about 3
years of on-and-off work that [began in earnest in March
2020](#656).

Because of the scale of changes involved in these releases, I would love to
hear about your experience. Especially if you notice undocumented changes in
behavior or performance changes (positive *or* negative).

Most changes in the first release are listed below. For more details, please
see the commit log, which reflects a linear and decently documented history
of all changes.

New features:

* [FEATURE #501](#501):
Permit many more characters to be escaped, even if they have no significance.
More specifically, any ASCII character except for `[0-9A-Za-z<>]` can now be
escaped. Also, a new routine, `is_escapeable_character`, has been added to
`regex-syntax` to query whether a character is escapeable or not.
* [FEATURE #547](#547):
Add `Regex::captures_at`. This filles a hole in the API, but doesn't otherwise
introduce any new expressive power.
* [FEATURE #595](#595):
Capture group names are now Unicode-aware. They can now begin with either a `_`
or any "alphabetic" codepoint. After the first codepoint, subsequent codepoints
can be any sequence of alpha-numeric codepoints, along with `_`, `.`, `[` and
`]`. Note that replacement syntax has not changed.
* [FEATURE #810](#810):
Add `Match::is_empty` and `Match::len` APIs.
* [FEATURE #905](#905):
Add an `impl Default for RegexSet`, with the default being the empty set.
* [FEATURE #908](#908):
A new method, `Regex::static_captures_len`, has been added which returns the
number of capture groups in the pattern if and only if every possible match
always contains the same number of matching groups.
* [FEATURE #955](#955):
Named captures can now be written as `(?<name>re)` in addition to
`(?P<name>re)`.
* FEATURE: `regex-syntax` now supports empty character classes.
* FEATURE: `regex-syntax` now has an optional `std` feature. (This will come
to `regex` in the second release.)
* FEATURE: The `Hir` type in `regex-syntax` has had a number of simplifications
made to it.
* FEATURE: `regex-syntax` has support for a new `R` flag for enabling CRLF
mode. This will be supported in `regex` proper in the second release.
* FEATURE: `regex-syntax` now has proper support for "regex that never
matches" via `Hir::fail()`.
* FEATURE: The `hir::literal` module of `regex-syntax` has been completely
re-worked. It now has more documentation, examples and advice.
* FEATURE: The `allow_invalid_utf8` option in `regex-syntax` has been renamed
to `utf8`, and the meaning of the boolean has been flipped.

Performance improvements:

* PERF: The upgrade to `aho-corasick 1.0` may improve performance in some
cases. It's difficult to characterize exactly which patterns this might impact,
but if there are a small number of longish (>= 4 bytes) prefix literals, then
it might be faster than before.

Bug fixes:

* [BUG #514](#514):
Improve `Debug` impl for `Match` so that it doesn't show the entire haystack.
* BUGS [#516](#516),
[#731](#731):
Fix a number of issues with printing `Hir` values as regex patterns.
* [BUG #610](#610):
Add explicit example of `foo|bar` in the regex syntax docs.
* [BUG #625](#625):
Clarify that `SetMatches::len` does not (regretably) refer to the number of
matches in the set.
* [BUG #660](#660):
Clarify "verbose mode" in regex syntax documentation.
* BUG [#738](#738),
[#950](#950):
Fix `CaptureLocations::get` so that it never panics.
* [BUG #747](#747):
Clarify documentation for `Regex::shortest_match`.
* [BUG #835](#835):
Fix `\p{Sc}` so that it is equivalent to `\p{Currency_Symbol}`.
* [BUG #846](#846):
Add more clarifying documentation to the `CompiledTooBig` error variant.
* [BUG #854](#854):
Clarify that `regex::Regex` searches as if the haystack is a sequence of
Unicode scalar values.
* [BUG #884](#884):
Replace `__Nonexhaustive` variants with `#[non_exhaustive]` attribute.
* [BUG #893](#893):
Optimize case folding since it can get quite slow in some pathological cases.
* [BUG #895](#895):
Reject `(?-u:\W)` in `regex::Regex` APIs.
* [BUG #942](#942):
Add a missing `void` keyword to indicate "no parameters" in C API.
* [BUG #965](#965):
Fix `\p{Lc}` so that it is equivalent to `\p{Cased_Letter}`.
* [BUG #975](#975):
Clarify documentation for `\pX` syntax.
crapStone added a commit to Calciumdibromid/CaBr2 that referenced this issue May 2, 2023
@crapStone
Update Rust crate regex to 1.8.1 (#1874)
2bc09ca 
This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [regex](https://github.com/rust-lang/regex) | dependencies | minor | `1.7.3` -> `1.8.1` |

---

### Release Notes

<details>
<summary>rust-lang/regex</summary>

### [`v1.8.1`](https://github.com/rust-lang/regex/blob/HEAD/CHANGELOG.md#&#8203;181-2023-04-21)

\==================
This is a patch release that fixes a bug where a regex match could be reported
where none was found. Specifically, the bug occurs when a pattern contains some
literal prefixes that could be extracted *and* an optional word boundary in the
prefix.

Bug fixes:

-   [BUG #&#8203;981](rust-lang/regex#981):
    Fix a bug where a word boundary could interact with prefix literal
    optimizations and lead to a false positive match.

### [`v1.8.0`](https://github.com/rust-lang/regex/blob/HEAD/CHANGELOG.md#&#8203;180-2023-04-20)

\==================
This is a sizeable release that will be soon followed by another sizeable
release. Both of them will combined close over 40 existing issues and PRs.

This first release, despite its size, essentially represents preparatory work
for the second release, which will be even bigger. Namely, this release:

-   Increases the MSRV to Rust 1.60.0, which was released about 1 year ago.
-   Upgrades its dependency on `aho-corasick` to the recently released 1.0
    version.
-   Upgrades its dependency on `regex-syntax` to the simultaneously released
    `0.7` version. The changes to `regex-syntax` principally revolve around a
    rewrite of its literal extraction code and a number of simplifications and
    optimizations to its high-level intermediate representation (HIR).

The second release, which will follow ~shortly after the release above, will
contain a soup-to-nuts rewrite of every regex engine. This will be done by
bringing [`regex-automata`](https://github.com/BurntSushi/regex-automata) into
this repository, and then changing the `regex` crate to be nothing but an API
shim layer on top of `regex-automata`'s API.

These tandem releases are the culmination of about 3
years of on-and-off work that [began in earnest in March
2020](rust-lang/regex#656).

Because of the scale of changes involved in these releases, I would love to
hear about your experience. Especially if you notice undocumented changes in
behavior or performance changes (positive *or* negative).

Most changes in the first release are listed below. For more details, please
see the commit log, which reflects a linear and decently documented history
of all changes.

New features:

-   [FEATURE #&#8203;501](rust-lang/regex#501):
    Permit many more characters to be escaped, even if they have no significance.
    More specifically, any ASCII character except for `[0-9A-Za-z<>]` can now be
    escaped. Also, a new routine, `is_escapeable_character`, has been added to
    `regex-syntax` to query whether a character is escapeable or not.
-   [FEATURE #&#8203;547](rust-lang/regex#547):
    Add `Regex::captures_at`. This filles a hole in the API, but doesn't otherwise
    introduce any new expressive power.
-   [FEATURE #&#8203;595](rust-lang/regex#595):
    Capture group names are now Unicode-aware. They can now begin with either a `_`
    or any "alphabetic" codepoint. After the first codepoint, subsequent codepoints
    can be any sequence of alpha-numeric codepoints, along with `_`, `.`, `[` and
    `]`. Note that replacement syntax has not changed.
-   [FEATURE #&#8203;810](rust-lang/regex#810):
    Add `Match::is_empty` and `Match::len` APIs.
-   [FEATURE #&#8203;905](rust-lang/regex#905):
    Add an `impl Default for RegexSet`, with the default being the empty set.
-   [FEATURE #&#8203;908](rust-lang/regex#908):
    A new method, `Regex::static_captures_len`, has been added which returns the
    number of capture groups in the pattern if and only if every possible match
    always contains the same number of matching groups.
-   [FEATURE #&#8203;955](rust-lang/regex#955):
    Named captures can now be written as `(?<name>re)` in addition to
    `(?P<name>re)`.
-   FEATURE: `regex-syntax` now supports empty character classes.
-   FEATURE: `regex-syntax` now has an optional `std` feature. (This will come
    to `regex` in the second release.)
-   FEATURE: The `Hir` type in `regex-syntax` has had a number of simplifications
    made to it.
-   FEATURE: `regex-syntax` has support for a new `R` flag for enabling CRLF
    mode. This will be supported in `regex` proper in the second release.
-   FEATURE: `regex-syntax` now has proper support for "regex that never
    matches" via `Hir::fail()`.
-   FEATURE: The `hir::literal` module of `regex-syntax` has been completely
    re-worked. It now has more documentation, examples and advice.
-   FEATURE: The `allow_invalid_utf8` option in `regex-syntax` has been renamed
    to `utf8`, and the meaning of the boolean has been flipped.

Performance improvements:

-   PERF: The upgrade to `aho-corasick 1.0` may improve performance in some
    cases. It's difficult to characterize exactly which patterns this might impact,
    but if there are a small number of longish (>= 4 bytes) prefix literals, then
    it might be faster than before.

Bug fixes:

-   [BUG #&#8203;514](rust-lang/regex#514):
    Improve `Debug` impl for `Match` so that it doesn't show the entire haystack.
-   BUGS [#&#8203;516](rust-lang/regex#516),
    [#&#8203;731](rust-lang/regex#731):
    Fix a number of issues with printing `Hir` values as regex patterns.
-   [BUG #&#8203;610](rust-lang/regex#610):
    Add explicit example of `foo|bar` in the regex syntax docs.
-   [BUG #&#8203;625](rust-lang/regex#625):
    Clarify that `SetMatches::len` does not (regretably) refer to the number of
    matches in the set.
-   [BUG #&#8203;660](rust-lang/regex#660):
    Clarify "verbose mode" in regex syntax documentation.
-   BUG [#&#8203;738](rust-lang/regex#738),
    [#&#8203;950](rust-lang/regex#950):
    Fix `CaptureLocations::get` so that it never panics.
-   [BUG #&#8203;747](rust-lang/regex#747):
    Clarify documentation for `Regex::shortest_match`.
-   [BUG #&#8203;835](rust-lang/regex#835):
    Fix `\p{Sc}` so that it is equivalent to `\p{Currency_Symbol}`.
-   [BUG #&#8203;846](rust-lang/regex#846):
    Add more clarifying documentation to the `CompiledTooBig` error variant.
-   [BUG #&#8203;854](rust-lang/regex#854):
    Clarify that `regex::Regex` searches as if the haystack is a sequence of
    Unicode scalar values.
-   [BUG #&#8203;884](rust-lang/regex#884):
    Replace `__Nonexhaustive` variants with `#[non_exhaustive]` attribute.
-   [BUG #&#8203;893](rust-lang/regex#893):
    Optimize case folding since it can get quite slow in some pathological cases.
-   [BUG #&#8203;895](rust-lang/regex#895):
    Reject `(?-u:\W)` in `regex::Regex` APIs.
-   [BUG #&#8203;942](rust-lang/regex#942):
    Add a missing `void` keyword to indicate "no parameters" in C API.
-   [BUG #&#8203;965](rust-lang/regex#965):
    Fix `\p{Lc}` so that it is equivalent to `\p{Cased_Letter}`.
-   [BUG #&#8203;975](rust-lang/regex#975):
    Clarify documentation for `\pX` syntax.

</details>

---

### Configuration

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---

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---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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Co-authored-by: cabr2-bot <cabr2.help@gmail.com>
Co-authored-by: crapStone <crapstone01@gmail.com>
Reviewed-on: https://codeberg.org/Calciumdibromid/CaBr2/pulls/1874
Reviewed-by: crapStone <crapstone@noreply.codeberg.org>
Co-authored-by: Calciumdibromid Bot <cabr2_bot@noreply.codeberg.org>
Co-committed-by: Calciumdibromid Bot <cabr2_bot@noreply.codeberg.org>
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