class ParserBase
{
	dchar[] document;
	int pos = 0;
	
	void parse(char[] str)
	{
		// load doc and sort out encoding so we can go back and forth..
		this.document = std.utf.toUTF32(str);
		
	}
	
	int getChar()
	{
		int r=  cast(int)document[pos];
		pos++;
		return r;
	}
	Value ungetChar(int n) {
		pos -= n;
		return null;
	}
	int getPos()
	{
		return pos;
	}
	Value setPos(int n) {
		pos = n;
		return null;
	}
	
	
}