Get index of search in substitute expression multiple times in Vim

Question

Sorry. Although this is one duplicate question of this, but I don't have reputations now, so I can't comment on the above original question. As one workaround, I posted a new question and this is my first question in this vi community. Hope someone can help me.

My question: If I search multiple times in one file, the counter won't be reinited as 0 between each search (here counter is to index the searched items). So it will keep increasing if I do the same search twice which is obviously not what needed.

for example, for string 111, if I searched first time and replaced, it is replaced as 123, but if I search 222 in the same file without quiting vim, it will be replaced as 456, which is not what I want( 123 to index them).

So can vim function reinited the counter referenced in the above link every time it gets called?

Specifically, I added one keymap based on above link

"from above link
function! MakeSearchIndex()
    let counter = 0
    function! SearchIndex() closure
        let counter += 1
        return counter
    endfunction
    return funcref('SearchIndex')
endfunction
let SI=MakeSearchIndex()
"my added keymap
cnoremap si s/\v/\=SI()/g<left><left><left><left><left><left><left><left><left>

Answer 1

To reinitialize the counter to zero you have to run:

:let SI=MakeSearchIndex()

If you want to reinitialize the counter to zero at every search you could do:

cnoremap si let SI=MakeSearchIndex() <bar> s/\v/\=SI()/g<left><left><left><left><left><left><left><left><left>