shiftAndAppend method
Implementation
State shiftAndAppend(HighLevelEncoderMode mode, int value) {
//assert binaryShiftByteCount == 0 && this.mode != mode;
Token token = _token;
final int thisModeBitCount = _mode == HighLevelEncoderMode.digit ? 4 : 5;
// Shifts exist only to UPPER and PUNCT, both with tokens size 5.
token = token.add(
HighLevelEncoder.shiftTable[_mode.index][mode.index],
thisModeBitCount,
);
token = token.add(value, 5);
return State(token, _mode, 0, _bitCount + thisModeBitCount + 5);
}