[vim9] vim9 function not found in viml script

[hebar...@googlemail.com]

The below script, when executed with "so %", gives error "E117: unknown function III".
Is there any way to remedy this (given that the same script, running as "vim9script" runs w/o error)?
As a side note: the functions below are part of my .vimrc; so I'm having trouble flagging the whole file as "vim9script"...
=======================
def III(hx: string): string
   return hx
enddef

def DDD(hx: string): string
   return hx
enddef

def SSS()
   echo III("HALA")
   echo DDD("HULU")
enddef

call SSS()
=======================

[Yegappan Lakshmanan]

Hi,

You need to prefix the command with ":vim9cmd"

- Yegappan

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[hebar...@googlemail.com]

@yegappanl

The only command I see I can prefix with "vim9cmd" is "call SSS()" (the others already are vim9 functions), to become "vim9cmd SSS()".
This however gives me error "E117: unknown function SSS" (instead of "III").

Prefixing the vim9(!) function III with "vim9cmd" actually works but makes - from my point of view - no sense at all (why would I need to flag a vim9 function as vim9 function if that's clear from its definition?)

Can you (or anybody) shed some light on this?

Info: I'm using the 9.0.242

[hebar...@googlemail.com]

Addendum: Actucally, both functions, DDD and III need to be flagged as "vim9cmd".

On the other hand, there are functions in the same script defined with "def" that work with no problems...

[Yegappan Lakshmanan]

Hi,

On Tue, Aug 23, 2022 at 10:05 AM 'hebar...@googlemail.com' via vim_dev
<vim...@googlegroups.com> wrote:
>
> @yegappanl
>
> The only command I see I can prefix with "vim9cmd" is "call SSS()" (the others already are vim9 functions), to become "vim9cmd SSS()".
> This however gives me error "E117: unknown function SSS" (instead of "III").
>

I was not clear in my earlier reply. You need to prefix the "source"
command with
"vim9cmd" and not the functions defined in the file.

When Vim sources a file, it needs a way to determine whether to parse
the file as
a legacy Vim script or as a Vim9 script. If the first command in the
file is "vim9script",
then Vim parses the file as a Vim 9 script. Otherwise it parses the
file as a legacy script.
In your case, since the file doesn't start with the vim9script
command, you need to
use the ":vim9cmd" prefix to the "source" command to force Vim to
parse the file as
a Vim9 script.

- Yegappan

> To view this discussion on the web visit https://groups.google.com/d/msgid/vim_dev/b95eb6c6-f509-44ee-a1ac-a209306a52dfn%40googlegroups.com.

[Bram Moolenaar]

It would work best to put "vim9script" in the first line. But if you
don't want that, prefix "g:" to the function names in SSS(). Since this
is a legacy script, functions are defined in the global namespace by
default. But in a :def function prefixing "g:" is required for using a
global function.

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