vim - 为什么这两个键绑定(bind)中的一个在它们几乎相同时会崩溃？

Question

这个问题显然远远超出了我对 Vim 的理解。这两个键绑定(bind)仅相差两个字符，否则完全相同。

" Move viewport up/down.
noremap <C-d> :exe "normal! " . (winheight(".") / 4) . "\<C-e>"<CR>
noremap <C-u> :exe "normal! " . (winheight(".") / 4) . "\<C-y>"<CR>

然而，底部的 ( <C-u> ) 按预期完美工作，而顶部的导致此错误:

E114: Missing quote: "\" E15: Invalid expression: "normal! " . (winheight(".") / 4) . "\"

我已经重新启动了 Vim 两次，并三重确保只有这些命令绑定(bind)到它们的键上。我也尝试切换它们，以防由于某种原因相关，但是 <C-d>命令仍然崩溃。

那么沃尔多呢？

---

gvim.exe --version 的输出:

VIM - Vi IMproved 7.3 (2010 Aug 15, compiled Aug 16 2010 10:31:31)MS-Windows 64-bit GUI version with OLE supportCompiled by george@reilly.orgHuge version with GUI.  Features included (+) or not (-):+arabic +autocmd +balloon_eval +browse ++builtin_terms +byte_offset +cindent +clientserver +clipboard +cmdline_compl +cmdline_hist +cmdline_info +comments +conceal +cryptv +cscope +cursorbind +cursorshape +dialog_con_gui +diff +digraphs -dnd -ebcdic +emacs_tags +eval +ex_extra +extra_search +farsi +file_in_path +find_in_path +float +folding -footer +gettext/dyn -hangul_input +iconv/dyn +insert_expand +jumplist +keymap +langmap +libcall +linebreak +lispindent +listcmds +localmap -lua +menu +mksession +modify_fname +mouse +mouseshape +multi_byte_ime/dyn +multi_lang -mzscheme +netbeans_intg +ole -osfiletype +path_extra -perl +persistent_undo +postscript +printer +profile +python/dyn -python3 +quickfix +reltime +rightleft -ruby +scrollbind +signs +smartindent -sniff +startuptime +statusline -sun_workshop +syntax +tag_binary +tag_old_static -tag_any_white -tcl -tgetent -termresponse +textobjects +title +toolbar +user_commands +vertsplit +virtualedit +visual +visualextra +viminfo +vreplace +wildignore +wildmenu +windows +writebackup -xfontset -xim -xterm_save -xpm_w32    system vimrc file: "$VIM\vimrc"     user vimrc file: "$HOME\_vimrc" 2nd user vimrc file: "$VIM\_vimrc"      user exrc file: "$HOME\_exrc"  2nd user exrc file: "$VIM\_exrc"  system gvimrc file: "$VIM\gvimrc"    user gvimrc file: "$HOME\_gvimrc"2nd user gvimrc file: "$VIM\_gvimrc"    system menu file: "$VIMRUNTIME\menu.vim"Compilation: cl -c /W3 /nologo  -I. -Iproto -DHAVE_PATHDEF -DWIN32   -DFEAT_CSCOPE -DFEAT_NETBEANS_INTG      -DWINVER=0x0400 -D_WIN32_WINNT=0x0400  /Fo.\ObjGOY/ /Ox /GL -DNDEBUG  /Zl /MT -DFEAT_OLE -DFEAT_MBYTE_IME -DDYNAMIC_IME -DFEAT_MBYTE -DFEAT_GUI_W32 -DDYNAMIC_ICONV -DDYNAMIC_GETTEXT -DFEAT_PYTHON -DDYNAMIC_PYTHON  -DDYNAMIC_PYTHON_DLL=\"python27.dll\" -DMSWINPS -DFEAT_HUGE /Fd.\ObjGOY/ /ZiLinking: link /RELEASE /nologo /subsystem:windows /LTCG:STATUS oldnames.lib kernel32.lib advapi32.lib shell32.lib gdi32.lib  comdlg32.lib ole32.lib uuid.lib /machine:AMD64 /nodefaultlib gdi32.lib version.lib   winspool.lib comctl32.lib advapi32.lib shell32.lib  /machine:AMD64 /nodefaultlib libcmt.lib oleaut32.lib  user32.lib

我从官方 Vim 下载页面上的链接下载了 Vim:

http://code.google.com/p/vim-win3264/downloads/list

Answer 1

noremap解释 <C-e>和 <C-y>之前 exe确实如此 exe然后输入控制序列，这些序列不一定被正确解释。一种可能的解决方法是定义命令然后映射到它们:

com! ShiftDown exe "norm!" winheight(".")/4 . "<C-e>"
com! ShiftUp exe "norm!" winheight(".")/4 . "<C-y>"
noremap <C-d> :ShiftDown<CR>
noremap <C-u> :ShiftUp<CR>

也可以使用 <C-v> 直接映射命令<C-e>和 <C-v> <C-y>插入这些字符:

noremap <C-d> :exe "norm!" winheight(".")/4 . "<C-v><C-e>"<CR>
noremap <C-u> :exe "norm!" winheight(".")/4 . "<C-v><C-y>"<CR>

或者，<LT>可用于插入文字 < :

noremap <C-d> :exe "norm!" winheight(".")/4 . "<Bslash><LT>C-e>"<CR>
noremap <C-u> :exe "norm!" winheight(".")/4 . "<Bslash><LT>C-y>"<CR>

注意虽然是文字 \可能有用，:help map建议使用 <Bslash>为了安全。