Support records experimental feature

[srawlins]

I forget how we enable experiments in dartpad, but we should soon-isssh start supporting the 'records' experiment. The command-line flag should be something like --enable-experiment=records.

We should not start now; things are too early. I think static support is largely complete, but the web support is not there yet, for when the user clicks "Run."

Additionally, there is likely a big change to the syntax coming. dart-lang/language#2469.

Just putting this on the radar. Maybe we can enable this in a few weeks on one channel or another.

[domesticmouse]

I'd guess the master channel will be the best place to do it, as that'll have the most up to date version of Dart

I would really like to test the records feature in DartPad. Is there a way for me to enable it manually in the master channel or do I have to wait for it to be enabled by default?

[srawlins]

No, it is not implemented yet. It will be some months.

[domesticmouse]

Records is now supported in stable. Closing.