$VIMRUNTIME/ftplugin/
中的某些脚本(例如python.vim
和ada.vim
)未定义b:undo_ftplugin
。 cpo
选项默认值为aABceFs
。
当我set ft=python
时,set ft=css
。 $VIMRUNTIME/ftplugin/css.vim
立即完成。并且始终omnifunc=pythoncomplete#Complete
。
每个ftplugin/name.vim
是否需要定义b:undo_ftplugin
?
这是/usr/share/vim/vim73/ftplugin.vim
:
" Vim support file to switch on loading plugins for file types
"
" Maintainer: Bram Moolenaar <Bram@vim.org>
" Last change: 2006 Apr 30
if exists("did_load_ftplugin")
finish
endif
let did_load_ftplugin = 1
augroup filetypeplugin
au FileType * call s:LoadFTPlugin()
func! s:LoadFTPlugin()
if exists("b:undo_ftplugin")
exe b:undo_ftplugin
unlet! b:undo_ftplugin b:did_ftplugin
endif
let s = expand("<amatch>")
if s != ""
if &cpo =~# "S" && exists("b:did_ftplugin")
" In compatible mode options are reset to the global values, need to
" set the local values also when a plugin was already used.
unlet b:did_ftplugin
endif
" When there is a dot it is used to separate filetype names. Thus for
" "aaa.bbb" load "aaa" and then "bbb".
for name in split(s, '\.')
exe 'runtime! ftplugin/' . name . '.vim ftplugin/' . name . '_*.vim ftplugin/' . name . '/*.vim'
endfor
endif
endfunc
augroup END
这是/usr/share/vim/vim73/ftplugin/css.vim
:
" Vim filetype plugin file
" Language: CSS
" Maintainer: Nikolai Weibull <now@bitwi.se>
" Latest Revision: 2008-07-09
if exists("b:did_ftplugin")
finish
endif
let b:did_ftplugin = 1
let s:cpo_save = &cpo
set cpo&vim
let b:undo_ftplugin = "setl com< cms< inc< fo< ofu<"
setlocal comments=s1:/*,mb:*,ex:*/ commentstring&
setlocal formatoptions-=t formatoptions+=croql
setlocal omnifunc=csscomplete#CompleteCSS
let &l:include = '^\s*@import\s\+\%(url(\)\='
let &cpo = s:cpo_save
unlet s:cpo_save
如果我set ft=python
,则set ft=css
。 Vim无法通过此测试:
if &cpo =~# "S" && exists("b:did_ftplugin")
b:did_ftplugin
不会被删除,因此ftplugin/css.vim
会立即完成。
答案 0 :(得分:8)
:help undo_ftplugin
提及:
当用户执行“:setfiletype xyz”时,应撤消先前文件类型的效果。
请注意,它表示“应该”,而不是“必须”。但是,根据实施情况
func! s:LoadFTPlugin()
if exists("b:undo_ftplugin")
exe b:undo_ftplugin
unlet! b:undo_ftplugin b:did_ftplugin
endif
ftplugin 必须定义b:undo_ftplugin
,否则无法通过:setf
更改其文件类型设置。我认为文档应该指出这一点,并且所有ftplugins都应该设置b:undo_ftplugin
(如果只是一个空的,无操作的值)。