gistfile1.txt

var ParseError = from _ in Parse.String("error") select Level.Error;
var ParseWarning = from _ in Parse.String("warning") select Level.Warning;
var ParseLevel = ParseError.Or(ParseWarning);
var ParsePosition =
	from lp in Parse.String("(")
	from line in Parse.Number
	from comma in Parse.String(", ")
	from column in Parse.Number
	from rp in Parse.String(")")
	select new Position
	{
		Line = int.Parse(line),
		Column = int.Parse(column),
	};
	
var ParseMessage =	
	from level in ParseLevel
	from position in ParsePosition
	from _ in Parse.Char(' ')
	from code in Parse.AnyChar.Until(Parse.Char(':')).Text()
	from text in Parse.AnyChar.Until(Parse.LineEnd).Text()
	select new Message{
		Level = level,
		Position = position,
		Code = code,
		Text = text,
	};

ParseMessage.Many().Parse(@"error(12, 34) CS0234: You are a bad programmer
error(1, 33) CS08934: I am very tired
warning(2, 3) CS33333: Bad things are happening here
").Dump();

class Message{
	public Level Level;
	public Position Position;
	public string Code;
	public string Text;
}
class Position
{
	public int Line;
	public int Column;
}
enum Level
{
	Error,
	Warning,
}