On 08/04/14 22:54, Justin M. Keyes wrote:
On Apr 8, 2014 4:36 PM, "Nikolay Pavlov" <[email protected]
<mailto:[email protected]>> wrote:
>
>
> On Apr 8, 2014 11:53 PM, "Justin M. Keyes" <[email protected]
<mailto:[email protected]>> wrote:
> >
> > Hi,
> >
> > It seems any plugin can :unlockvar any global variable that was
locked by another plugin. So, is the purpose of lockvar simply a
friendly warning/sanity check?
> >
> > Also, is there a speedup gained by using lockvar? (Maybe it helps
the vimscript optimizer to know that variable cannot be modified?) If
so, should I use lockvar whenever possible in my plugins?
>
> There is no such a thing as "vimscript optimizer". There is even no
separate parser: commands (and expressions) are executed as they are
parsed, so even
>
> echo (system('touch abc')
>
> will create file 'abc' even though there is missing closing
parenthesis. AST is never created.
Thanks Nikolay. I was thinking that might be the response.
So can anyone comment on the utility of lockvar? It must have been added
for a reason.
Justin M. Keyes
Another script may unlock the variable, yes, but that requires awareness
that the variable may have been locked in the first place. Many scripts use
let foo = "bar"
but how many do you think use
try
let foo = "bar"
catch /^Vim\%((\a\+)\)\=:E471/
unlockvar foo
let foo = "bar"
endtry
or even
try
let foo = "bar"
catch
unlet foo
let foo = "bar"
endtry
,especially if the variable foo was defined in a different script?
Best regards,
Tony.
--
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Drank up all of daddy's gin,
Mother said, when he was plastered,
Go to bed, you little ... love-child.
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