I was working on some code that set b:undo_ftplugin, but it didn't
have any effect when I set a new filetype. I copied
$VIMRUNTIME/ftplugin.vim to ~/.vim and instrumented the section that
is supposed to execute b:undo_ftplugin.
func! s:LoadFTPlugin()
echo "In s:LoadFTPlugin()" | sleep 2
echo "b:undo_ftplugin is" b:undo_ftplugin | sleep 2
if exists("b:undo_ftplugin")
echo "b:undo_ftplugin exists" | sleep 2
exe b:undo_ftplugin
unlet! b:undo_ftplugin b:did_ftplugin
endif
Whenever I open a new file for which Vim can detect the filetype, or
:edit some file, I always get the following errors.
Error detected while processing function <SNR>5_LoadFTPlugin:
line 2:
E121: Undefined variable: b:undo_ftplugin
E15: Invalid expression: b:undo_ftplugin | sleep 2
That is even after I execute
:echo b:undo_ftplugin
and verify that it is set correctly according to the new filetype.
It seems that b:undo_ftplugin does not exist in the environment in
which s:LoadFTPlugin() is executed. Does setting b:undo_ftplugin as
most current ftplugin scripts do actually do anything?
I am running Vim 7.3.646 on Linux.
Regards,
Gary
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