Backrefs

Jun 3, 2018

- **FIX**: POSIX character classes should not be part of a range.
- **FIX**: Replace string casing logic properly follows other implementations like Boost etc. `\L`, `\C`, and `\E` should all terminate `\L`, and `\C`. `\l` and `\c` will be ignored if followed by `\C` or `\L`.

Mar 13, 2018

- **NEW**: Use a more advanced format string implementation that implements all string features, included those found in `format_spec`.
- **FIX**: Relax validation so not to exclude valid named Unicode values.
- **FIX**: Caching issues where byte string patterns were confused with Unicode patterns.
- **FIX**: More protection against using conflicting string type combinations with search and replace.

Mar 8, 2018

- **NEW**: Add support for generic line breaks (`\R`) to Re.
- **NEW**: Add support for an overly simplified form of grapheme clusters (`\X`) to Re. Roughly equivalent to `(?>\PM\pM*)`.
- **NEW**: Add support for `Vertical_Orientation` property for Unicode 10.0.0 on Python 3.7.

Feb 27, 2018

- **NEW**: Add support for `Indic_Positional_Category`\\`Indic_Matra_Category` and `Indic_Syllabic_Category` properties.

Feb 26, 2018

- **FIX**: `Bidi_Paired_Bracket_type` property's `None` value should be equivalent to all characters that are not `open` or `close` characters.

Feb 25, 2018

- **NEW**: Add support for `Script_Extensions` Unicode properties (Python 3 only as Python 2, Unicode 5.2.0 does not define these). Can be accessed via `\p{scripts_extensions: kana}` or `\p{scx: kana}`.
- **NEW**: When defining scripts with just their name `\p{Kana}`, use `Script_Extensions` instead of `Scripts`. To get `Scripts` results, you must specify `\p{scripts: kana}` or `\p{sc: scripts}`.
- **NEW**: Add `Bidi_Paired_Bracket_Type` Unicode property (Python 3.4+ only).
- **NEW**: Add support for `IsBinary` for binary properties: `\p{IsAlphabetic}` == `\p{Alphabetic: Y}`.
- **FIX**: Tweaks/improvements to string iteration.