keen/exception

Source
This is a standard module and does not need to be explicitly imported.
exception variant
show string()
todo record (has private fields)
show string(_ todo)
not-implemented record (has private fields)
show string(_ not-implemented)
error record
show string
Thrown when an exception is not specified in an assert or forbid.
unreachable record (has private fields)
show string(_ unreachable)