Need label documentation

[medz]

What information needs to be added?

In Dart, label is supported for level jump. However, there is almost no description in the Dart documentation website.

This is the only mention I found: https://dart.dev/language/branches#:~:text=%3A%0A%20%20%20%20executeOpen()%3B-,continue%20newCase%3B,-//%20Continues%20executing%20at

Label is really simple and can be used as an advanced method to optimize performance:
https://github.com/medz/alien-signals-dart/blob/main/lib/src/system.dart#L257

I am using the label function to eliminate recursive calls, so the performance of the propagate function is improved by about 10%.

To be honest, it is difficult to find the description and support of labels in the dart documentation.

Where should this new content appear?

I hope to see information and instructions about labels in https://dart.dev/language/branches. It also indicates that Dart supports this feature.

I would like to fix this problem.

• I will try and fix this problem on dart.dev.