//*
// * Finds the next token on the stream. This method will return
// * null when end of file has been reached. It will return a
// * parse exception if no token matched the input stream.
// *
// * @return the next token found, or
// * null if end of file was encountered
// *
// * @throws ParseException if the input stream couldn't be read or
// * parsed correctly
//
private Token NextToken()
{
TokenMatcher m = default(TokenMatcher);
string str = null;
int line = 0;
int column = 0;
try
{
m = FindMatch();
if (m != null)
{
line = input.LineNumber;
column = input.ColumnNumber;
str = input.ReadString(m.GetMatchedLength());
return(new Token(m.GetMatchedPattern(), str, line, column));
}
else if (input.Peek() < 0)
{
return(null);
}
else
{
line = input.LineNumber;
column = input.ColumnNumber;
throw new ParseException(ParseException.ErrorType.UNEXPECTED_CHAR, input.ReadString(1), line, column);
}
}
catch (IOException e)
{
throw new ParseException(ParseException.ErrorType.IO, e.Message, -1, -1);
}
}
