error: 'i2' is a reserved type name and cannot be used as an identifier
  --> examples/1140-diagnostics-reserved-name-const-fn-decl.sx:14:1
   |
14 | i2 :: 5;
   | ^^

error: 'u8' is a reserved type name and cannot be used as an identifier
  --> examples/1140-diagnostics-reserved-name-const-fn-decl.sx:15:1
   |
15 | u8 :: (n: i64) -> i64 { return n + 7; }
   | ^^