CODEWITHSUNDEEP
vimvim-pluginvundle
leiming
leiming

Reputation: 504

How to understand `{'key: function('1')}` in VimScript？

Rescently I am in favor of a Vim plugin called Vundle. a dict named as g:bundle has a item:

{'path': function('1')}

If I call the item.path(), Vundle can invoke "s:bundle.path()" in vundle/config.vim :

func! s:bundle.path()
    return s:expand_path(g:bundle_dir.'/'.self.name)
endf

So, could you tell me the usage about parameter "1" of anonymous function in Vimscript?

Updated:

Thanks for Mr. Karkat.

I use :function {1} command, whose result is:

function 1() dict                                                                                                                                                          
    return s:expand_path(g:bundle_dir.'/'.self.name)
endfunction

the function block is same as s:bundle.path(), it proves that number in braces means Funcref:

The function will then get a nusmber and the value of dict.len is a Funcref that references this function. The function can only be used through a Funcref. It will automatically be deleted when there is no Funcref remaining that refers to it.

Referance:

https://github.com/gmarik/Vundle.vim/blob/master/autoload/vundle/config.vim#L106 http://vimdoc.sourceforge.net/htmldoc/eval.html#Dictionary-function

Upvotes: 1

Views: 736

Answers (1)

Ingo Karkat
Ingo Karkat

Reputation: 172698

What you see is an anonymous Dictionary function. What this means is that for the Dictionary {'path': function('1')} (let's call it foo, and we know that it's an element of g:bundles), there has been defined this:

let foo = {}
function foo.path() dict
    return "foo"
endfunction

You can find out more about the function definition via

:function {1}

Upvotes: 1

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