On Apr 25, 2014 2:52 AM, "Alex Efros" <[email protected]> wrote:
>
> Hi!
>
> On Thu, Apr 24, 2014 at 12:43:01PM +0200, Bram Moolenaar wrote:
> > > Me, too. The following used to work:
> > >
> > > fun! Foo()
> > > endfun
> > > let g:Foo = function('Foo')
> > >
> > > After 7.4.264, I get:
> > > " E705: Variable name conflicts with existing function: g:Foo
> >
> > That is correct. Previously Foo() and g:Foo were different names, which
> > is wrong. Both refer to the same function.
>
> So, what is the right way to implement this, compatible with pre-patch-260
> and current one? I wanna use global variable to define user-configurable
> handler function, and I've in my plugin code exactly as shown above.
> My plugin uses exists() and type() for testing value of that global
> variable, and they return different results for g:Foo in cases
> fun g:Foo()
> endfun
> and
> fun Foo()
> endfun
> let g:Foo = function('Foo')
> That's why such let operation was added.
>
> My guess right solution should be
> fun s:Foo()
> endfun
> let g:Foo = function('s:Foo')
> but I'm not 100% sure.
As long as you care about backward compatibility it is not the right one:
previously g:Foo was calling s:Foo, now it will call <SNR>123_Foo. You will
see the difference once you try to call g:Foo() from command mode or any
file that is not the one where you defined s:Foo.
>
> Also in my plugin I allow users to use symbolic funcref for their custom
> handlers:
> fun MyHandler()
> endfun
> let g:Handler = 'MyHandler'
> by using type() to detect is variable contains text and then converting it
> to real funcref using exists('*MyHandler') and then function('MyHandler) -
> is this logic still correct after patch 265? Real code is here:
>
https://code.google.com/p/vim-plugin-viewdoc/source/browse/plugin/viewdoc.vim#181
>
>
> P.S. One more difference between fun g:Foo and let g:Foo=function() is
> while auto-complete 'Foo<Tab>' in command line - first case shown as
> 'Foo(', second as 'Foo' - maybe it makes sense to detect variables with
> funcref values and show them with '(' in autocomplete too?
>
> --
> WBR, Alex.
>
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