Fold C-style comments

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Tip: #874 - Fold C-style comments

Created: February 11, 2005 13:24 Complexity: intermediate Author: David Vos Version: 6.0 Karma: 5/4 Imported from: Tip#874

Do want to make the 10-line /*style*/ comment disappear?

You can add folding capability to C-style comments using the command:

au BufNewFile,BufRead *.cpp,*.c,*.h,*.java syn region myCComment start="/\*" end="\*/" fold keepend transparent

This will work on C, .h, C++, and Java files.

The "keepend" and "transperent" commands are necessary to avoid overriding the default syntax highlighting of comments.

If you want to keep the "/*" beginning of the comment in the folded text, you can

use the following function:

set foldtext=MyFoldText() 

function MyFoldText() 

let line = getline(v:foldstart) 

let sub = substitute(line, '^[\t ]*', , ) 

let nlines = v:foldend - v:foldstart + 1 

if strlen(nlines) == 1 

let nlines = " " . nlines 

elseif strlen(nlines) == 2 

let nlines = " " . nlines 

endif 

return "+-" . v:folddashes . nlines . ": " . sub 

endfunction 

The resulting line should look about the same as the default, without removing the comments.

Comments

For displaying text in the folded column, there is also a script available, GetFDCText or something like that.

Anonymous , February 13, 2005 12:03

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How do I use it. I want to see just code and not the function headers which are in comments.

itsmangesh--AT--gmail.com , March 1, 2005 2:18

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