Tip 639 Printable Monobook Previous Next
created 2004 · complexity basic · author Karthick Gururaj · version 6.0
If your C/C++ code is scattered with statements like
#ifdef DEBUG // Some code.. cout << "Debug output: blah" << endl; #endif
and you would like to highlight these segments in a different colour (so that you can skip them visually), add the following code in your .vimrc (colouring follows that of comments)
syn region MySkip contained start="^\s*#\s*\(if\>\|ifdef\>\|ifndef\>\)" skip="\\$" end="^\s*#\s*endif\>" contains=MySkip let g:CommentDefines = "" hi link MyCommentOut2 MyCommentOut hi link MySkip MyCommentOut hi link MyCommentOut Comment map <silent> ,a :call AddCommentDefine()<CR> map <silent> ,x :call ClearCommentDefine()<CR> function! AddCommentDefine() let g:CommentDefines = "\\(" . expand("<cword>") . "\\)" syn clear MyCommentOut syn clear MyCommentOut2 exe 'syn region MyCommentOut start="^\s*#\s*ifdef\s\+' . g:CommentDefines . '\>" end=".\|$" contains=MyCommentOut2' exe 'syn region MyCommentOut2 contained start="' . g:CommentDefines . '" end="^\s*#\s*\(endif\>\|else\>\|elif\>\)" contains=MySkip' endfunction function! ClearCommentDefine() let g:ClearCommentDefine = "" syn clear MyCommentOut syn clear MyCommentOut2 endfunction
To see the effect, position the cursor on the word DEBUG in the C code snippet above and type ,a