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It seems you've already found a working solution, but I wanted to address the issues with your attempted approaches. But when I press /, instead of running the function and then starting the search prompt, I get this text inserted to my buffer: rm! / You're getting this result because you're using <BAR> in your mapping after you already left ...


In your specific case, you can use a zero-width negative match and still have it work on empty lines. I don't want to use zero-width matching expressions because I don't want to have to specify a non-zero-width matching portion, which could cause the search to miss some qualifying lines. So you can use the ^ as the matching portion outside the zero-width ...


Figured out the the <silent> was hiding the search prompt, and also the mapping can be done just like this: nnoremap / :call <SID>FooFunction()<CR>/


user938271's great answer already answers your explicit questions about what happens when you press Ctrl-RCtrl-W during an incremental search. I just wanted to suggest that you might want to try pressing Ctrl-L instead. During a search with 'incsearch' set, this adds the next character after the current match each time it is pressed. So with your example, ...


why does it add water C-r C-w inserts the word positioned under your cursor; however, if 'incsearch' is set, and there is a match in the buffer for the current contents of the command-line, Vim doesn't use the cursor position anymore, but the end of the match. From :h c^r^w: When 'incsearch' is set the cursor position at the end of the currently displayed ...


I think the main problem is that the search() function is moving your cursor. You can fix this by passing the 'n' flag: let newBG = search(searchString, 'n') != 0 ? "green" : "red" Then you have the problem that when you first type / the code highlights the status line according to the previous search. The cleanest way to fix is this not to run the code if ...


In addition to other answers, look in the docs for \v which, at the beginning of the search string, makes it behave as "very magic", which means that + will work the way you want, while \+ will refer to the literal plus sign.


If you read :help pattern, you’ll see you need \+. Vim’s patterns are not quite like PCRE or POSIX B/ERE

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