Re: Vim9 - Can not get compile to recognize a deep variable

> I have read through the Vim9.txt, and can not find a solution to this issue.
> When I call Parse(), the script version with the entire command on one line (|) gives error 'E121: Undefined variable: udp' in function add().
> Both commands work if used on the command line, so its particular to running in a Vim9 script.
>
> This works:
> def g:Parse(): void
> var udp: list<string>
>
> :3global/^\s*<per/substitute/^\s*<per\(.\{-}"\)\{2}\|\s\+>.*$//g
> :3substitute/\s\+.\{-}"\zs.\{-}\ze"/\=add(udp, submatch(0))/gn
> # :3global/^\s*<per/substitute/^\s*<per\(.\{-}"\)\{2}\|\s\+>.*$//g
> # | substitute/\s\+.\{-}"\zs.\{-}\ze"/\=add(udp, submatch(0))/gn
>
> echo udp
> enddef
>
> This does not work:
> def g:Parse(): void
> var udp: list<string>
>
> # :3global/^\s*<per/substitute/^\s*<per\(.\{-}"\)\{2}\|\s\+>.*$//g
> # :3substitute/\s\+.\{-}"\zs.\{-}\ze"/\=add(udp, submatch(0))/gn
> :3global/^\s*<per/substitute/^\s*<per\(.\{-}"\)\{2}\|\s\+>.*$//g
> | substitute/\s\+.\{-}"\zs.\{-}\ze"/\=add(udp, submatch(0))/gn
>
> echo udp
> enddef

This happens because when compiling the function, when the :substitute
command is separate, the compiler recognizes the "\=" in the
substitution. Then it works.

When joining the two lines the compiler only sees the ":global" command
and doesn't check for the "\=" argument.

This is nearly impossible to fix, because parsing the ":global" command
requires parsing just about any Ex command. That can only be done at
runtime, and then the local variable is not visible.

You'll have to use a workaround. You could make the "udp" variable a
global. That is what would happen in legacy script as well.

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