Same as forward_search, but moves backward.
match_end will never be set to a TextIter located after
this, even if there is a possible match_start before or at this
.
| this |
a TextIter where the search begins |
| str |
search string |
| flags |
bitmask of flags affecting the search |
| match_start |
return location for start of match, or null |
| match_end |
return location for end of match, or null |
| limit |
location of last possible |
|
whether a match was found |