pub type UTF8Char = UInt8;Expand description
An 8-bit code value in UTF-8 format. UnicodeScalarValues
0-0x7F are expressed in UTF-8 format using one UTF8Char
with the same value. UnicodeScalarValues above 0x7F are
expressed in UTF-8 format using 2-4 UTF8Chars, all with
values in the range 0x80-0xF4 (UnicodeScalarValues
0x100-0xFFFF use two or three UTF8Chars,
UnicodeScalarValues 0x10000-0x10FFFF use four UTF8Chars).