private void ParseMulti(Token start)
{
Token next = PeekToken();
if (next.Type != TokenType.Char)
{
AddUnitChar(start);
return;
}
Multi node = new Multi(_concatenate);
node.AddChar(start);
while (PeekToken().Type == TokenType.Char && PeekToken(1).Type != TokenType.Quantifier)
{
node.AddChar(GetToken());
}
}