- g:neosnippet#snippets_directory allows list.

autoload/neosnippet.vim

@@ -31,7 +31,7 @@ set cpo&vim
 call neosnippet#util#set_default(
       \ 'g:neosnippet#disable_runtime_snippets', {})
 call neosnippet#util#set_default(
-      \ 'g:neosnippet#snippets_directory', '')
+      \ 'g:neosnippet#snippets_directory', [])
 call neosnippet#util#set_default(
       \ 'g:neosnippet#disable_select_mode_mappings', 1)
 call neosnippet#util#set_default(
@@ -1360,7 +1360,7 @@ function! s:initialize_script_variables() "{{{
 
   " Set snippets_dir.
   let s:snippets_dir = []
-  for dir in split(g:neosnippet#snippets_directory, '\s*,\s*')
+  for dir in neosnippet#util#option2list(g:neosnippet#snippets_directory)
     let dir = neosnippet#util#expand(dir)
     if !isdirectory(dir) && !neosnippet#util#is_sudo()
       call mkdir(dir, 'p')

autoload/neosnippet/util.vim

@@ -1,7 +1,7 @@
 "=============================================================================
 " FILE: util.vim
 " AUTHOR: Shougo Matsushita <Shougo.Matsu@gmail.com>
-" Last Modified: 26 Sep 2013.
+" Last Modified: 12 Nov 2013.
 " License: MIT license  {{{
 "     Permission is hereby granted, free of charge, to any person obtaining
 "     a copy of this software and associated documentation files (the
@@ -117,6 +117,9 @@ function! neosnippet#util#is_sudo() "{{{
       \ && $HOME ==# expand('~'.$SUDO_USER)
 endfunction"}}}
 
+function! neosnippet#util#option2list(str) "{{{
+  return type(a:str) == type('') ? split(a:str, '\s*,\s*') : a:str
+endfunction"}}}
 
 let &cpo = s:save_cpo
 unlet s:save_cpo

doc/neosnippet.txt

@@ -129,8 +129,8 @@ VARIABLES 					*neosnippet-variables*
 
 g:neosnippet#snippets_directory		*g:neosnippet#snippets_directory*
 		This variable appoints a path to user-defined snippet files.
-		You can set multiple values in comma-separated form. Non
-		existing directories are ignored.
+		You can set multiple values in comma-separated string or list.
+		Non existing directories are ignored.
 
 		User defined snippet files are read after the built-in snippet
 		files. If redundant snippets occur they get overwritten and
@@ -141,10 +141,10 @@ g:neosnippet#snippets_directory		*g:neosnippet#snippets_directory*
 		file it loads the snippets from:
 
 		- "vim.snip*"
-		- "vim_*.snip*" 
-	        - "vim/**/*.snip" 
+		- "vim_*.snip*"
+	        - "vim/**/*.snip"
 
-		This variable doesn't exist unless you declare it.
+		The default value is [].
 
 				*g:neosnippet#disable_select_mode_mappings*
 g:neosnippet#disable_select_mode_mappings