main()
{
	reader := OpenFile("/etc/nginx/mime.types")
	
	line := 1
	//Read the file from OS ensuring at least one line is ready
	reader.BufferLine() 

	//Expects will set HasError to true if the expected word didn't match
	reader.WS().Expect("types")
	reader.WS().Expect("{").ExpectEOL()
	while reader.BufferLine()
	{
		line++
		if (reader.WS().AtEOL())
			continue
		
		//Eat will consume characters until it finds one of these tokens or a newline
		//mime is a string slice, not a copy
		mime, tok := reader.Eat("\t }")
		if tok == '}'
			break
		while tok != ';' && reader.Ok {
			ext, tok2 = reader.WS().Eat("\t ;")
			tok .= tok2 //later we may allow ext, tok mut = ...
			if ext.size == 0
				continue
			//Both mime and ext are availiable since no invalidating functions were called.
			//Bufferline, WSNL and IsEOF may overwrite previous data
			print("mime: $mime ext: $ext\n", 0)
		}
	}
	reader.WS().ExpectEOF()
	//Instead of checking for errors everywhere
	//we can handle it at one location
	if reader.HasError {
		print("We did not process the file correctly")
		return
	}
	print("Done")
}