[New rule] avoid-substring

[fzyzcjy]

Rule details

As we know, using String.substring method will cause problems if you are having emojis in the string. There are many articles in the web, such as dart-lang/sdk#35798. Users should replace s.substring(100,200) with s.characters.getRange(100,200).

What type of rule is this?

Warns about a potential problem

Example code

s.substring(100,200); // LINT

### Participation

- [ ] I am willing to submit a pull request to implement this rule.

### Additional comments

_No response_

[incendial]

@fzyzcjy do you want to implement it yourself? If not, all new rules implemented by me are added to the Teams version only.

[incendial]

I'd also be happy to give you the Teams version license for your effort on DCM. If you're interested, please mail me at [email protected]

[fzyzcjy]

@incendial Hi, I do not have a strong need for the Teams license currently, but thanks for providing the license to me!

[lsaudon]

I'm going to do it.

[incendial]

Available in 5.7.0 🚀