public bool NextLexeme()
{
switch (_currChar)
{
case '\0':
_kind = LexKind.Eof;
return(false);
case '(':
case ')':
case '=':
case '/':
_kind = (LexKind)Convert.ToInt32(_currChar);
NextChar();
break;
case '^':
NextChar();
if (_currChar == '^' || _currChar == '(' || _currChar == ')')
{
_kind = LexKind.EscapedData;
NextChar();
}
else
{
throw new XPointerSyntaxException(Resources.CircumflexCharMustBeEscaped);
}
break;
default:
if (Char.IsDigit(_currChar))
{
_kind = LexKind.Number;
var start = _ptrIndex - 1;
var len = 0;
while (Char.IsDigit(_currChar))
{
NextChar();
len++;
}
Number = XmlConvert.ToInt32(_ptr.Substring(start, len));
break;
}
if (LexUtils.IsStartNameChar(_currChar))
{
_kind = LexKind.NcName;
Prefix = String.Empty;
NcName = ParseName();
if (_currChar == ':')
{
//QName?
NextChar();
Prefix = NcName;
_kind = LexKind.QName;
if (LexUtils.IsStartNcNameChar(_currChar))
{
NcName = ParseName();
}
else
{
throw new XPointerSyntaxException(String.Format(CultureInfo.CurrentCulture, Resources.InvalidNameToken, Prefix, _currChar));
}
}
CanBeSchemaName = _currChar == '(';
break;
}
if (LexUtils.IsWhitespace(_currChar))
{
_kind = LexKind.Space;
while (LexUtils.IsWhitespace(_currChar))
{
NextChar();
}
break;
}
_kind = LexKind.EscapedData;
break;
}
return(true);
}