| Home | Libraries | People | FAQ | More

### Appendix 2: Not Yet Implemented

The following features are planned for xpressive 2.X:

- `syntax_option_type::collate`
- Collation sequences such as `[.a.]`
- Equivalence classes like `[=a=]`
- Control of nested results generation with `syntax_option_type::nosubs`, and a `nosubs()` modifier for static xpressive.

Here are some wish-list features. You or your company should consider hiring me to implement them!

- Optimized DFA back-end for simple, fast regexing.
- Different regex compiler front ends for basic, extended, awk, grep and egrep regex syntax.
- Fine-grained control over the dynamic regex syntax
- Optional integration with ICU for full Unicode support.
- Improved localization support, possibly as a custom facet for `std::locale`.