private IToken ScanIdent(int start, Func <char, bool> extraChars)
{
while (Advancable())
{
if (CurrentCharacter.IsAlphanumeric() || extraChars(CurrentCharacter))
{
continue;
}
else if (CurrentCharacter.IsWhiteSpace())
{
return(Add(EToken.Identifier, start, this));
}
else
{
return(Add(EToken.Identifier, start, Formula.Substring(start - 1, CharPosition-- - start)));
}
}
return(Add(EToken.Identifier, start, this));
}
