(diagnostic
  (schema slovo.diagnostic)
  (version 1)
  (severity error)
  (code MalformedIfForm)
  (message "`if` expects condition, then expression, else expression")
  (file "<fixture>")
  (span
    (bytes 37 48)
    (range 5 3 5 14)
  )
  (hint "use `(if condition then-expression else-expression)`")
)