diff options
Diffstat (limited to 'runtime/doc/fold.txt')
| -rw-r--r-- | runtime/doc/fold.txt | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/runtime/doc/fold.txt b/runtime/doc/fold.txt index 03dd6a61ba..680e3270f2 100644 --- a/runtime/doc/fold.txt +++ b/runtime/doc/fold.txt @@ -1,4 +1,4 @@ -*fold.txt* For Vim version 7.4. Last change: 2013 Dec 04 +*fold.txt* For Vim version 7.4. Last change: 2016 Jan 02 VIM REFERENCE MANUAL by Bram Moolenaar @@ -94,9 +94,9 @@ These are the conditions with which the expression is evaluated: lowest. "=" use fold level from the previous line "a1", "a2", .. add one, two, .. to the fold level of the previous - line + line, use the result for the current line "s1", "s2", .. subtract one, two, .. from the fold level of the - previous line + previous line, use the result for the next line "<1", "<2", .. a fold with this level ends at this line ">1", ">2", .. a fold with this level starts at this line @@ -119,6 +119,18 @@ method can be very slow! Try to avoid the "=", "a" and "s" return values, since Vim often has to search backwards for a line for which the fold level is defined. This can be slow. +An example of using "a1" and "s1": For a multi-line C comment, a line +containing "/*" would return "a1" to start a fold, and a line containing "*/" +would return "s1" to end the fold after that line: > + if match(thisline, '/\*') >= 0 + return 'a1' + elseif match(thisline, '\*/') >= 0 + return 's1' + else + return '=' + endif +However, this won't work for single line comments, strings, etc. + |foldlevel()| can be useful to compute a fold level relative to a previous fold level. But note that foldlevel() may return -1 if the level is not known yet. And it returns the level at the start of the line, while a fold might @@ -570,8 +582,9 @@ what you type! When using an operator, a closed fold is included as a whole. Thus "dl" deletes the whole closed fold under the cursor. -For Ex commands the range is adjusted to always start at the first line of a -closed fold and end at the last line of a closed fold. Thus this command: > +For Ex commands that work on buffer lines the range is adjusted to always +start at the first line of a closed fold and end at the last line of a closed +fold. Thus this command: > :s/foo/bar/g when used with the cursor on a closed fold, will replace "foo" with "bar" in all lines of the fold. |