Reserved Words
Every word Flex reserves. None can be used as an identifier.
abstract annotation any as assert
assuming bit branch break choice
component connection const contract do
else end enum exch extends
extensible false filter flatmap float32
float64 fold for from function
given giving global group if
import in into invariant let
listen local loop map match
message module newtype none on
Optional parallel protocol recv scan
send set some string struct
system tail then to transform
true try type value_cast var
variant where with zip