Question

I m using rails.vim and I love how you can use ctrl-x ctrl-u in insert mode to autocomplete long method names like distance_of_time_in_words and accepts_nested_attributes_for. But for some reason it doesn t work in haml files and I can t seem to figure out what s wrong or how to fix it.

:help i_CTRL-X_CTRL-U says the autocompletion is using completefunc. The haml file says its completefunc=syntaxcomplete#Complete (and it s the same in erb and helper files where ctrl-x ctrl-u works fine.) I can t find where the syntaxcomplete#Complete magic is defined, but presumably it has something to do with the filetype syntax. My .vim/syntax/haml.vim comes from vim-haml, so I tried removing it but the problem persists. Commenting out my entire .vimrc didn t help either. What else can I try?

UPDATE: I searched my vim config files and the only place that looks like it s doing anything with syntaxcomplete#Complete is in autoload/rails.vim and looks like this:

function! s:resetomnicomplete()
  if exists("+completefunc") && &completefunc ==  syntaxcomplete#Complete 
    if exists("g:loaded_syntax_completion")
      " Ugly but necessary, until we have our own completion
      unlet g:loaded_syntax_completion
      silent! delfunction syntaxcomplete#Complete
    endif
  endif
endfunction

Answer 1

Functions with # in name are defined in autoload scripts:

A function that can be autoloaded has a name like this:
:call filename#funcname()
When such a function is called, and it is not defined yet, Vim will search the "autoload" directories in runtimepath for a script file called "filename.vim". For example "~/.vim/autoload/filename.vim".

See :help autoload.

Answer 2

Looks like the file you re looking for is part of vim:

$ find /usr/share/vim/ -iname "syntaxcomplete.vim"
/usr/share/vim/vim72/autoload/syntaxcomplete.vim

There s a vim.org page with the latest version of the script.

If you want to customize the completion, you can just write your own completion function. See :help complete-functions

You can also use Ctrl+n to use vim s simple completion. It completes with text from any of the open files, but can be customized. (See :help complete )

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