# Read a markdown link address and append it to the `out` buffer.
	private fun read_md_link(out: FlatBuffer, start: Int): Int do
		var pos = start
		var counter = 1
		while pos < length do
			var c = self[pos]
			if c == '\\' and pos + 1 < length then
				pos = escape(out, self[pos + 1], pos)
			else
				var end_reached = false
				if c == '(' then
					counter += 1
				else if c == ' ' then
					if counter == 1 then end_reached = true
				else if c == ')' then
					counter -= 1
					if counter == 0 then end_reached = true
				end
				if end_reached then break
				out.add c
			end
			pos += 1
		end
		if pos == length then return -1
		return pos
	end