vim中当复制时不要使用omnicppcomplete自动补全功能

[静之深]

由于设置了自动补全功能，导致在复制一段代码时，其也会自动补全，导致复制速度很慢，另外复制到vim
中的内容也被其给修改掉，请问该如何进行设置，我的配置如下：

""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" 
"omnicppcomplete设置
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" 
"""按下F3自动补全代码，注意该映射语句后不能有其他字符，包括tab；否则按下F3会自动补全一些乱码
"imap <F3> <C-X><C-O>
"" 按下F2根据头文件内关键字补全
" imap <F2> <C-X><C-I>
 set completeopt=menu,menuone " 关掉智能补全时的预览窗口
 let OmniCpp_MayCompleteDot = 1 " autocomplete with .
 let OmniCpp_MayCompleteArrow = 1 " autocomplete with ->
 let OmniCpp_MayCompleteScope = 1 " autocomplete with ::
 let OmniCpp_SelectFirstItem = 2 " select first item (but don't insert)
 let OmniCpp_NamespaceSearch = 2 " search namespaces in this and includedfiles
 let OmniCpp_ShowPrototypeInAbbr = 1 " show function prototype in popupwindow
 let OmniCpp_GlobalScopeSearch=1 " enable the global scope search
 let OmniCpp_DisplayMode=1 " Class scope completion mode: always show allmembers
 let OmniCpp_DefaultNamespaces=["std"]
 let OmniCpp_ShowScopeInAbbr=1 " show scope in abbreviation and remove the
 "last column
 let OmniCpp_ShowAccess=1