> The MetaPost plugin in Vim contains the following definition to replace
> the n-th occurrence of `beginfig(...)` with `beginfig(n)`:
>
> function! s:fix_beginfigs()
> let i = 1
> g/^beginfig(\d*);$/s//\='beginfig('.i.');'/ | let i = i + 1
> endfunction
>
> command -nargs=0 FixBeginfigs call s:fix_beginfigs()
>
> On attempting to convert it to Vim9 script, I came up with this:
>
> def FixBeginfig()
> i = 1
> g/^beginfig(\d*);$/s//\='beginfig(' .. i .. ');'/ | i += 1
> enddef
>
> command! -buffer -nargs=0 -bar FixBeginfigs call <sid>FixBeginfig()
>
> But this results in 'Undefined variable: i', likely because the command
> is not evaluated in Vim9 script context.
>
> Any idea what would be the best way to convert the snippet above?
Well, this works:
def Fix_beginfigs()
g:index = 1
g/^beginfig(\d*);$/s//\='beginfig(' .. g:index .. ');'/ | g:index = g:index +
1
unlet g:index
enddef
However, using a legacy function would not be worse. The global command
does most of the work, what function it's in doesn't really matter.
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