1- number 2+ 3If <start> or <end> is a number, it specifies an 4absolute line number (lines count from 1). 5+ 6 7- /regex/ 8+ 9This form will use the first line matching the given 10POSIX regex. If <end> is a regex, it will search 11starting at the line given by <start>. 12+ 13 14- +offset or -offset 15+ 16This is only valid for <end> and will specify a number 17of lines before or after the line given by <start>. 18+ 19 20- :regex 21+ 22If the option's argument is of the form :regex, it denotes the range 23from the first funcname line that matches <regex>, up to the next 24funcname line. 25+