When starting an Erlang node the specific feature (or all) must be enabled otherwise the .beam file with the feature will not be allowed for loading.
erl -enable-feature maybe_expr
Or
erl -enable-feature all
For more details see the feature section in the Erlang Reference Manual.
Page Not Found
Looks like you've followed a broken link or entered a URL that doesn't exist on this site.
Back to our site
If this is your site, and you weren't expecting a 404 for this path, please visit Netlify's ["page not found" support guide](https://answers.netlify.com/t/support-guide-i-ve-deployed-my-site-but-i-still-see-page-not-found/125?utm_source=404page&utm_campaign=community_tracking) for troubleshooting tips.
hello!
https://www.erlang.org/blog/my-otp-25-highlights/#selectable-features-and-the-new-maybe_expr-feature there are link on this page --
For more details see the feature section in the Erlang Reference Manual.
but on that link - https://www.erlang.org/doc/reference_manual/feature.html -