socketdev/tc39-propoal-progress-allowing-regexp

tc39-propoal-progress-allowing-regexp's Issues

Doc re2 impl

Just a ref https://github.com/google/re2/blob/9049cd28d7496e05e7b7beaec89291d8bc6a31ee/re2/re2.h#L146

Doc iter-tools/regex impl

See: https://github.com/iter-tools/regex. It contains a proposed API as well as a polyfill implementation. Thanks to @jcbhmr for pointing this proposal out to me!

What would syntax/API look like?

Would it be a extends TransformStream class? A .feed() method? A .hitEnd property? An override of .exec() with two parameters? A flag like /regex/p?

I know this is way ahead of a stage -1 proposal. I'm just a curious user who wants to know what kind of API I could use in a ponyfill of a similar MyCustomProgressiveRegExp class.

You can close this issue if this question is too far in the future

Scope of backtracking for chunk manipulation purposes?

for a given set of text manipulating chunks: a and b and a pattern p:

// any <br> following another <br>
let p = /(?<=<br>)<br>/
let a = ''
let b = '<br>'

Match results from b would change if a changed to <br>. When matching just b individually it would be good to know if it backtracked to the start of b for lookbehind not just if it reached the end of b.

This is a slight oddity due to less ecosystem data on lookbehind. This could be in or out of scope depending.