Advanced Vim Programming

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发布于：Sep 16, 2020

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<SID>

The string <SID> can be used in a mapping or menu.

When executing the map command, Vim will replace <SID> with the special key code <SNR>, followed by a number that’s unique for the script, and an underscore. Example: :map <SID>Add could define a mapping <SNR>23\_Add.

When you map some thing to a s: function, which means you may call it may mapping outside of the script. Try the follow scirpts:

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function! s:say()
    echo expand("<SID>")
    echo "hello"
endfunction
map WW :call s:say()<CR>
map RR :call <SID>say()<CR>

When mapping WW is executed from outside of scirpt, it don’t know which the script the function was defined.

The :scriptnames command can be used to see which scripts have been sourced

<sfile>

:h <sfile>

<Plug>

The special key name <Plug> can be used for an internal mapping, which is not to be matched with any key sequence. This is useful in plugins

As the doc file said, <Plug> key is often use in a internal mapping. Like:

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func! s:somecme
    ...
endfunc
noremap <silent> <Plug>SomeCmd :call <SID>somecmd
nmap ss <Plug>SomeCmd

• Why Vim has this feature?
  • may be its a way to set alias in vimscript?