def utf8.four

emerging-ezhttp@0.21.0.0 · src/pct.bend:39

import Base

39# four bytes: U+10000 to U+10FFFF
40def utf8.four(+cp: U32) -> List<&2, U32>:
41  [U32.or(240, U32.shrn(cp, 18n)), cont(cp, 12n), cont(cp, 6n), cont(cp, 0n)]