[JW Lua] Return value issue with v0.66

[Robert Patterson]

Okay, so it isn't exactly a bug. ExecuteLuaScriptItem returns the top value
on the Lua stack, which is the *last* value returned. So the question is,
do I modify it to return the first value returned (i.e., the last value on
the stack), or do I modify the docs to say it returns the last value
returned?

Mir ist es egal.


On Sun, Mar 12, 2023 at 2:24 PM Robert Patterson <
robert at robertgpatterson.com> wrote:

> I created this script called "test_return_value.lua":
>
> function plugindef()
>     finaleplugin.RequireDocument = false
>     finaleplugin.LoadLuaSocket = true
>     finaleplugin.IgnoreReturnValue = true
> end
>
> return 11, 12, 13
>
>
> And I call it with this script:
>
>
> local script_path = finenv.RunningLuaFolderPath() ..
> "test_return_value.lua"
> local items = finenv.CreateLuaScriptItemsFromFilePath(script_path)
> local success, errmsg, msgtype =
> finenv.ExecuteLuaScriptItem(items:GetItemAt(0))
> if errmsg ~= null then print("type", msgtype, errmsg) end
>
> It always returns: success==true, errmsg=="13", msgtype==0.
>
> The bug here is that it should be returning errmsg=="11". I'm not sure why
> it isn't, and I need to research it.
>
>
>
> On Sun, Mar 12, 2023 at 1:12 PM Jan Angermüller <jan at angermueller.com>
> wrote:
>
>> Robert,
>>
>> thanks a lot for v0.66!
>>
>> I have been testing the compatibility with Perfect Layout and also tried
>> the new "return value" handling.
>> It seems to me like there is still a problem. I tried it in
>> Fin27/Win10/RGP Lua v.66.
>>
>> I call the plug-in with:
>> local success,d1,d2=finenv.ExecuteLuaScriptItem(script)
>>
>> When the plug-in ended without error, but with:
>> return 11,12,13
>>
>> The script above gave these values:
>> success=true
>> d1=13
>> d2=0
>>
>> I think this is correct. (However, I have not found it in the
>> documentation.)
>>
>> *BUT: *this only happened the very first time when I called the script
>> directly after starting Finale.
>> When I run the ExecuteLuaScriptItem a second time, it always results in:
>>
>> success=true
>> d1=""            --or at least it's an "empty nothing" when I print it
>> with   tostring(d1). It's not nil.
>> d2=0
>>
>> So after the first run I can't influence the return value anymore.
>> Seems like the return value is permanently stored somewhere in RGP Lua.
>>
>> When I restart Finale, it's the same behaviour: first time correct value
>> 13, after that "".
>>
>> Jan
>> _______________________________________________
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>> JWLua at jwmusic.nu
>> http://jwmusic.nu/mailman/listinfo/jwlua_jwmusic.nu
>>
>
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