vim9script function forward reference

[Ernie Rael]

I've tried different things, the following looked like a good shot, but
it fails. Can a forward reference be done?

vim9script

var X: func = funcref('F')

def F()
    echo "in F()"
enddef

X()

line    3:
E700: Unknown function: F

-ernie

[Bram Moolenaar]

Ernie Rael wrote:

> I've tried different things, the following looked like a good shot, but=20

> it fails. Can a forward reference be done?
>
> vim9script
>
> var X: func = funcref('F')
>
> def F()
>     echo "in F()"
> enddef
>
> X()
>
> line    3:
> E700: Unknown function: F

Not really. You can declare the "X" variable and set it only after
defining F() though. You can't use it earlier anyway.
If you really need to you could store the name of the function as a
string and use funcref() where you need to use it.

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[Ernie Rael]

On 4/2/22 1:43 PM, Bram Moolenaar wrote:
> Ernie Rael wrote:
>
>> I've tried different things, the following looked like a good shot, but=20
>> it fails. Can a forward reference be done?
>>
>> vim9script
>>
>> var X: func = funcref('F')
>>
>> def F()
>>     echo "in F()"
>> enddef
>>
>> X()
>>
>> line    3:
>> E700: Unknown function: F
> Not really. You can declare the "X" variable and set it only after
> defining F() though. You can't use it earlier anyway.
> If you really need to you could store the name of the function as a
> string and use funcref() where you need to use it.
>

Thanks, now I understand a little better. I'm not sure I'll need it,
and glad to know how. Previously I look at help for funcref, "Just
like function()" looked at help for function(). My eyes glazed over...

-ernie