On Wednesday, 6 December 2017 at 09:24:33 UTC, Jonathan M Davis wrote: > a full code point (IIRC, 1 - 6 code units for UTF-8 and 1 - 2 > for UTF-16), YDNRC, 1 - 4 code units for UTF-8. Unicode is defined only up to U+10FFFF. Everything above is illegal.