there are some, but see for example

https://github.com/wyvernlang/wyvern/blob/master/examples/bo...

Is that a statically checked DSL? Is it part of the base language? If it's a DSL, where is it defined?

(not a critic to parent's post, just saying it in case someone involved in the project steps here)

Oh boy, I hope this is just some awkward whitespace parsing by GitHub: https://github.com/wyvernlang/wyvern/blob/master/examples/ca...

No thanks.