regexp-tree

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Compat-transpiler: implement `u` flag

3

The `u` flag should already be implemented by most of the engines, however, there are still old engines which do not implement it, so it'll still be nice to have...

DmitrySoshnikov

Transform: utils for supporting tree consistency

5

Some utils might be useful to abstract away a boilerplate users have to do if they want to keep an AST consistent after some modifications. Example: all capturing groups have...

DmitrySoshnikov

Should the optimizer avoid rewriting to `\W`?

1

See . Per ES6, `/\W/iu` was equivalent to `/[^0-9a-jl-rt-zA-JL-RT-Z_]/u`, and [engines implemented it that way](https://github.com/tc39/ecma262/pull/525#issuecomment-228016109). This was fixed in the spec in [June 2016](https://github.com/tc39/ecma262/pull/525#issuecomment-228016109). Now, `/\W/iu` is equivalent to `/[^0-9a-zA-Z_\u{017F}\u{212A}]/u`....

mathiasbynens

Currently the code base is not statically type checked, we can use [Flow](https://flow.org/) type checker to validate it. (actually, this will require another build step with transpiling JS code --...

DmitrySoshnikov

The `hasIndices` or `/d` regex flag is part of ES2022. > The `d` flag indicates that the result of a regular expression match should contain the start and end indices...

aloisklink

Would it be possible to offer ESM versions of regexp-tree and its modules, in addition to the current CommonJS? It would be great to be able to use `import` with...

slevithan

Support the `v` flag

2

ES2024's `v` flag (`unicodeSets`, an upgrade to flag `u`) has been supported since Node.js 20 and [2023-era browsers](https://caniuse.com/mdn-javascript_builtins_regexp_unicodesets). Currently, regexp-tree cannot parse the `v` flag, and as far as I...

slevithan