buffer (reader)
The current buffer (what we're going to read next)
line (reader)
The line number of the last consumed text
scan
Returns
the pattern, if found, or nil if the Source is empty or the pattern is not found.
Scans the source for a given pattern. Note, that this is not your usual scan() method. For one thing, the pattern argument has some requirements; for another, the source can be consumed. You can easily confuse this method. Originally, the patterns were easier to construct and this method more robust, because this method generated search regexes on the fly; however, this was computationally expensive and slowed down the entire REXML package considerably, since this is by far the most commonly called method.