diff --git a/autoload/neocomplcache/sources/snippets_complete.vim b/autoload/neocomplcache/sources/snippets_complete.vim
index f03814e..44a88ec 100644
--- a/autoload/neocomplcache/sources/snippets_complete.vim
+++ b/autoload/neocomplcache/sources/snippets_complete.vim
@@ -33,7 +33,7 @@ let s:source = {
       \     g:neocomplcache_auto_completion_start_length,
       \}
 
-function! s:source.initialize() "{{{
+function! s:source.initialize() abort "{{{
   " Initialize.
   call neocomplcache#set_dictionary_helper(
         \ g:neocomplcache_source_rank, 'snippets_complete', 8)
@@ -41,7 +41,7 @@ function! s:source.initialize() "{{{
         \ g:neocomplcache_auto_completion_start_length)
 endfunction"}}}
 
-function! s:source.get_keyword_pos(cur_text) "{{{
+function! s:source.get_keyword_pos(cur_text) abort "{{{
   let cur_word = matchstr(a:cur_text, '\w\+$')
   let word_candidates = neocomplcache#keyword_filter(
         \ filter(values(neosnippet#helpers#get_snippets()),
@@ -53,7 +53,7 @@ function! s:source.get_keyword_pos(cur_text) "{{{
   return match(a:cur_text, '\S\+$')
 endfunction"}}}
 
-function! s:source.get_complete_words(cur_keyword_pos, cur_keyword_str) "{{{
+function! s:source.get_complete_words(cur_keyword_pos, cur_keyword_str) abort "{{{
   let list = s:keyword_filter(neosnippet#helpers#get_snippets(), a:cur_keyword_str)
 
   for snippet in list
@@ -66,7 +66,7 @@ function! s:source.get_complete_words(cur_keyword_pos, cur_keyword_str) "{{{
   return list
 endfunction"}}}
 
-function! s:keyword_filter(snippets, cur_keyword_str) "{{{
+function! s:keyword_filter(snippets, cur_keyword_str) abort "{{{
   " Uniq by real_name.
   let dict = {}
 
@@ -89,7 +89,7 @@ function! s:keyword_filter(snippets, cur_keyword_str) "{{{
   return values(dict)
 endfunction"}}}
 
-function! neocomplcache#sources#snippets_complete#define() "{{{
+function! neocomplcache#sources#snippets_complete#define() abort "{{{
   return s:source
 endfunction"}}}
 
diff --git a/autoload/neocomplete/sources/neosnippet.vim b/autoload/neocomplete/sources/neosnippet.vim
index bcc3782..e267726 100644
--- a/autoload/neocomplete/sources/neosnippet.vim
+++ b/autoload/neocomplete/sources/neosnippet.vim
@@ -37,7 +37,7 @@ let s:source = {
       \          ['matcher_fuzzy'] : ['matcher_head']),
       \}
 
-function! s:source.gather_candidates(context) "{{{
+function! s:source.gather_candidates(context) abort "{{{
   let snippets = values(neosnippet#helpers#get_completion_snippets())
   if matchstr(a:context.input, '\S\+$') !=#
         \ matchstr(a:context.input, '\w\+$')
@@ -47,7 +47,7 @@ function! s:source.gather_candidates(context) "{{{
   return snippets
 endfunction"}}}
 
-function! s:source.hooks.on_post_filter(context) "{{{
+function! s:source.hooks.on_post_filter(context) abort "{{{
   for snippet in a:context.candidates
     let snippet.dup = 1
     let snippet.menu = neosnippet#util#strwidthpart(
@@ -57,7 +57,7 @@ function! s:source.hooks.on_post_filter(context) "{{{
   return a:context.candidates
 endfunction"}}}
 
-function! neocomplete#sources#neosnippet#define() "{{{
+function! neocomplete#sources#neosnippet#define() abort "{{{
   return s:source
 endfunction"}}}
 
diff --git a/autoload/neosnippet.vim b/autoload/neosnippet.vim
index 98591ca..7629d2a 100644
--- a/autoload/neosnippet.vim
+++ b/autoload/neosnippet.vim
@@ -53,61 +53,61 @@ call neosnippet#util#set_default(
       \ {'_':{ '(' : ')', '{' : '}', '"' : '"', '[' : ']' }})
 "}}}
 
-function! neosnippet#expandable_or_jumpable() "{{{
+function! neosnippet#expandable_or_jumpable() abort "{{{
   return neosnippet#mappings#expandable_or_jumpable()
 endfunction"}}}
-function! neosnippet#expandable() "{{{
+function! neosnippet#expandable() abort "{{{
   return neosnippet#mappings#expandable()
 endfunction"}}}
-function! neosnippet#jumpable() "{{{
+function! neosnippet#jumpable() abort "{{{
   return neosnippet#mappings#jumpable()
 endfunction"}}}
-function! neosnippet#anonymous(snippet) "{{{
+function! neosnippet#anonymous(snippet) abort "{{{
   return neosnippet#mappings#_anonymous(a:snippet)
 endfunction"}}}
-function! neosnippet#expand(trigger) "{{{
+function! neosnippet#expand(trigger) abort "{{{
   return neosnippet#mappings#_expand(a:trigger)
 endfunction"}}}
 
-function! neosnippet#get_snippets_directory() "{{{
+function! neosnippet#get_snippets_directory() abort "{{{
   return neosnippet#helpers#get_snippets_directory()
 endfunction"}}}
-function! neosnippet#get_user_snippets_directory() "{{{
+function! neosnippet#get_user_snippets_directory() abort "{{{
   return copy(neosnippet#variables#snippets_dir())
 endfunction"}}}
-function! neosnippet#get_runtime_snippets_directory() "{{{
+function! neosnippet#get_runtime_snippets_directory() abort "{{{
   return copy(neosnippet#variables#runtime_dir())
 endfunction"}}}
 
 " Get marker patterns.
-function! neosnippet#get_placeholder_target_marker_pattern() "{{{
+function! neosnippet#get_placeholder_target_marker_pattern() abort "{{{
   return '\${\d\+:\(#:\)\?TARGET\%(:.\{-}\)\?\\\@<!}'
 endfunction"}}}
-function! neosnippet#get_placeholder_marker_pattern() "{{{
+function! neosnippet#get_placeholder_marker_pattern() abort "{{{
   return '<`\d\+\%(:.\{-}\)\?\\\@<!`>'
 endfunction"}}}
-function! neosnippet#get_placeholder_marker_substitute_pattern() "{{{
+function! neosnippet#get_placeholder_marker_substitute_pattern() abort "{{{
   return '\${\(\d\+\%(:.\{-}\)\?\\\@<!\)}'
 endfunction"}}}
-function! neosnippet#get_placeholder_marker_substitute_nonzero_pattern() "{{{
+function! neosnippet#get_placeholder_marker_substitute_nonzero_pattern() abort "{{{
   return '\${\([1-9]\d*\%(:.\{-}\)\?\\\@<!\)}'
 endfunction"}}}
-function! neosnippet#get_placeholder_marker_substitute_zero_pattern() "{{{
+function! neosnippet#get_placeholder_marker_substitute_zero_pattern() abort "{{{
   return '\${\(0\%(:.\{-}\)\?\\\@<!\)}'
 endfunction"}}}
-function! neosnippet#get_placeholder_marker_default_pattern() "{{{
+function! neosnippet#get_placeholder_marker_default_pattern() abort "{{{
   return '<`\d\+:\zs.\{-}\ze\\\@<!`>'
 endfunction"}}}
-function! neosnippet#get_sync_placeholder_marker_pattern() "{{{
+function! neosnippet#get_sync_placeholder_marker_pattern() abort "{{{
   return '<{\d\+\%(:.\{-}\)\?\\\@<!}>'
 endfunction"}}}
-function! neosnippet#get_sync_placeholder_marker_default_pattern() "{{{
+function! neosnippet#get_sync_placeholder_marker_default_pattern() abort "{{{
   return '<{\d\+:\zs.\{-}\ze\\\@<!}>'
 endfunction"}}}
-function! neosnippet#get_mirror_placeholder_marker_pattern() "{{{
+function! neosnippet#get_mirror_placeholder_marker_pattern() abort "{{{
   return '<|\d\+|>'
 endfunction"}}}
-function! neosnippet#get_mirror_placeholder_marker_substitute_pattern() "{{{
+function! neosnippet#get_mirror_placeholder_marker_substitute_pattern() abort "{{{
   return '\$\(\d\+\)'
 endfunction"}}}
 
diff --git a/autoload/neosnippet/commands.vim b/autoload/neosnippet/commands.vim
index 4b0f631..73919a0 100644
--- a/autoload/neosnippet/commands.vim
+++ b/autoload/neosnippet/commands.vim
@@ -34,14 +34,14 @@ let s:edit_options = [
 let s:Cache = neosnippet#util#get_vital().import('System.Cache')
 "}}}
 
-function! s:get_list() "{{{
+function! s:get_list() abort "{{{
   if !exists('s:List')
     let s:List = vital#of('neosnippet').import('Data.List')
   endif
   return s:List
 endfunction"}}}
 
-function! neosnippet#commands#_edit(args) "{{{
+function! neosnippet#commands#_edit(args) abort "{{{
   if neosnippet#util#is_sudo()
     call neosnippet#util#print_error(
           \ '"sudo vim" is detected. This feature is disabled.')
@@ -92,7 +92,7 @@ function! neosnippet#commands#_edit(args) "{{{
   endtry
 endfunction"}}}
 
-function! neosnippet#commands#_make_cache(filetype) "{{{
+function! neosnippet#commands#_make_cache(filetype) abort "{{{
   call neosnippet#init#check()
 
   let filetype = a:filetype == '' ?
@@ -128,7 +128,7 @@ function! neosnippet#commands#_make_cache(filetype) "{{{
   endif
 endfunction"}}}
 
-function! neosnippet#commands#_source(filename) "{{{
+function! neosnippet#commands#_source(filename) abort "{{{
   call neosnippet#init#check()
 
   let neosnippet = neosnippet#variables#current_neosnippet()
@@ -136,7 +136,7 @@ function! neosnippet#commands#_source(filename) "{{{
         \ neosnippet#parser#_parse_snippets(a:filename))
 endfunction"}}}
 
-function! neosnippet#commands#_clear_markers() "{{{
+function! neosnippet#commands#_clear_markers() abort "{{{
   let expand_stack = neosnippet#variables#expand_stack()
 
   " Get patterns and count.
@@ -150,12 +150,12 @@ function! neosnippet#commands#_clear_markers() "{{{
 endfunction"}}}
 
 " Complete helpers.
-function! neosnippet#commands#_edit_complete(arglead, cmdline, cursorpos) "{{{
+function! neosnippet#commands#_edit_complete(arglead, cmdline, cursorpos) abort "{{{
   return filter(s:edit_options +
         \ neosnippet#commands#_filetype_complete(a:arglead, a:cmdline, a:cursorpos),
         \ 'stridx(v:val, a:arglead) == 0')
 endfunction"}}}
-function! neosnippet#commands#_filetype_complete(arglead, cmdline, cursorpos) "{{{
+function! neosnippet#commands#_filetype_complete(arglead, cmdline, cursorpos) abort "{{{
   " Dup check.
   let ret = {}
   for item in map(
@@ -170,13 +170,13 @@ function! neosnippet#commands#_filetype_complete(arglead, cmdline, cursorpos) "{
 
   return sort(keys(ret))
 endfunction"}}}
-function! neosnippet#commands#_complete_target_snippets(arglead, cmdline, cursorpos) "{{{
+function! neosnippet#commands#_complete_target_snippets(arglead, cmdline, cursorpos) abort "{{{
   return map(filter(values(neosnippet#helpers#get_snippets()),
         \ "stridx(v:val.word, a:arglead) == 0
         \ && v:val.snip =~# neosnippet#get_placeholder_target_marker_pattern()"), 'v:val.word')
 endfunction"}}}
 
-function! s:initialize_options(options) "{{{
+function! s:initialize_options(options) abort "{{{
   let default_options = {
         \ 'runtime' : 0,
         \ 'vertical' : 0,
diff --git a/autoload/neosnippet/handlers.vim b/autoload/neosnippet/handlers.vim
index 0691220..78a813e 100644
--- a/autoload/neosnippet/handlers.vim
+++ b/autoload/neosnippet/handlers.vim
@@ -26,7 +26,7 @@
 let s:save_cpo = &cpo
 set cpo&vim
 
-function! neosnippet#handlers#_complete_done() "{{{
+function! neosnippet#handlers#_complete_done() abort "{{{
   if empty(v:completed_item)
         \ || !g:neosnippet#enable_completed_snippet
         \ || s:is_auto_pairs()
@@ -43,7 +43,7 @@ function! neosnippet#handlers#_complete_done() "{{{
   call neosnippet#view#_insert(snippet, {}, cur_text, col)
 endfunction"}}}
 
-function! neosnippet#handlers#_cursor_moved() "{{{
+function! neosnippet#handlers#_cursor_moved() abort "{{{
   let expand_stack = neosnippet#variables#expand_stack()
 
   " Get patterns and count.
@@ -59,7 +59,7 @@ function! neosnippet#handlers#_cursor_moved() "{{{
   endif
 endfunction"}}}
 
-function! neosnippet#handlers#_all_clear_markers() "{{{
+function! neosnippet#handlers#_all_clear_markers() abort "{{{
   let pos = getpos('.')
 
   try
@@ -74,7 +74,7 @@ function! neosnippet#handlers#_all_clear_markers() "{{{
   endtry
 endfunction"}}}
 
-function! neosnippet#handlers#_restore_unnamed_register() "{{{
+function! neosnippet#handlers#_restore_unnamed_register() abort "{{{
   let neosnippet = neosnippet#variables#current_neosnippet()
 
   if neosnippet.unnamed_register != ''
diff --git a/autoload/neosnippet/helpers.vim b/autoload/neosnippet/helpers.vim
index 172353f..53e56a3 100644
--- a/autoload/neosnippet/helpers.vim
+++ b/autoload/neosnippet/helpers.vim
@@ -26,7 +26,7 @@
 let s:save_cpo = &cpo
 set cpo&vim
 
-function! neosnippet#helpers#get_cursor_snippet(snippets, cur_text) "{{{
+function! neosnippet#helpers#get_cursor_snippet(snippets, cur_text) abort "{{{
   let cur_word = matchstr(a:cur_text, '\S\+$')
   if cur_word != '' && has_key(a:snippets, cur_word)
       return cur_word
@@ -44,7 +44,7 @@ function! neosnippet#helpers#get_cursor_snippet(snippets, cur_text) "{{{
   return cur_word
 endfunction"}}}
 
-function! neosnippet#helpers#get_snippets() "{{{
+function! neosnippet#helpers#get_snippets() abort "{{{
   call neosnippet#init#check()
 
   let neosnippet = neosnippet#variables#current_neosnippet()
@@ -72,12 +72,12 @@ function! neosnippet#helpers#get_snippets() "{{{
 
   return snippets
 endfunction"}}}
-function! neosnippet#helpers#get_completion_snippets() "{{{
+function! neosnippet#helpers#get_completion_snippets() abort "{{{
   return filter(neosnippet#helpers#get_snippets(),
         \ "!get(v:val.options, 'oneshot', 0)")
 endfunction"}}}
 
-function! neosnippet#helpers#get_snippets_directory() "{{{
+function! neosnippet#helpers#get_snippets_directory() abort "{{{
   let snippets_dir = copy(neosnippet#variables#snippets_dir())
   if !get(g:neosnippet#disable_runtime_snippets,
         \ neosnippet#helpers#get_filetype(),
@@ -88,7 +88,7 @@ function! neosnippet#helpers#get_snippets_directory() "{{{
   return snippets_dir
 endfunction"}}}
 
-function! neosnippet#helpers#get_filetype() "{{{
+function! neosnippet#helpers#get_filetype() abort "{{{
   if !exists('s:exists_context_filetype')
     " context_filetype.vim installation check.
     try
@@ -109,7 +109,7 @@ function! neosnippet#helpers#get_filetype() "{{{
   return context_filetype
 endfunction"}}}
 
-function! neosnippet#helpers#get_selected_text(type, ...) "{{{
+function! neosnippet#helpers#get_selected_text(type, ...) abort "{{{
   let sel_save = &selection
   let &selection = 'inclusive'
   let reg_save = @@
@@ -134,7 +134,7 @@ function! neosnippet#helpers#get_selected_text(type, ...) "{{{
     call setpos('.', pos)
   endtry
 endfunction"}}}
-function! neosnippet#helpers#delete_selected_text(type, ...) "{{{
+function! neosnippet#helpers#delete_selected_text(type, ...) abort "{{{
   let sel_save = &selection
   let &selection = 'inclusive'
   let reg_save = @@
@@ -157,7 +157,7 @@ function! neosnippet#helpers#delete_selected_text(type, ...) "{{{
     call setpos('.', pos)
   endtry
 endfunction"}}}
-function! neosnippet#helpers#substitute_selected_text(type, text) "{{{
+function! neosnippet#helpers#substitute_selected_text(type, text) abort "{{{
   let sel_save = &selection
   let &selection = 'inclusive'
   let reg_save = @@
@@ -181,7 +181,7 @@ function! neosnippet#helpers#substitute_selected_text(type, text) "{{{
   endtry
 endfunction"}}}
 
-function! s:is_beginning_of_line(cur_text) "{{{
+function! s:is_beginning_of_line(cur_text) abort "{{{
   let keyword_pattern = '\S\+'
   let cur_keyword_str = matchstr(a:cur_text, keyword_pattern.'$')
   let line_part = a:cur_text[: -1-len(cur_keyword_str)]
@@ -190,7 +190,7 @@ function! s:is_beginning_of_line(cur_text) "{{{
   return prev_word_end <= 0
 endfunction"}}}
 
-function! s:get_sources_filetypes(filetype) "{{{
+function! s:get_sources_filetypes(filetype) abort "{{{
   let filetypes =
         \ exists('*context_filetype#get_filetypes') ?
         \   context_filetype#get_filetypes(a:filetype) :
diff --git a/autoload/neosnippet/init.vim b/autoload/neosnippet/init.vim
index c554030..f3d8a18 100644
--- a/autoload/neosnippet/init.vim
+++ b/autoload/neosnippet/init.vim
@@ -26,27 +26,27 @@
 let s:save_cpo = &cpo
 set cpo&vim
 
-function! neosnippet#init#_initialize() "{{{
+function! neosnippet#init#_initialize() abort "{{{
   let s:is_initialized = 1
 
   call s:initialize_others()
   call s:initialize_cache()
 endfunction"}}}
 
-function! neosnippet#init#check() "{{{
+function! neosnippet#init#check() abort "{{{
   if !exists('s:is_initialized')
     call neosnippet#init#_initialize()
   endif
 endfunction"}}}
 
-function! s:initialize_cache() "{{{
+function! s:initialize_cache() abort "{{{
   " Make cache for _ snippets.
   call neosnippet#commands#_make_cache('_')
 
   " Initialize check.
   call neosnippet#commands#_make_cache(&filetype)
 endfunction"}}}
-function! s:initialize_others() "{{{
+function! s:initialize_others() abort "{{{
   augroup neosnippet "{{{
     autocmd!
     " Set make cache event.
@@ -98,7 +98,7 @@ function! s:initialize_others() "{{{
 
   if g:neosnippet#enable_snipmate_compatibility "{{{
     " For snipMate function.
-    function! Filename(...)
+    function! Filename(...) abort
       let filename = expand('%:t:r')
       if filename == ''
         return a:0 == 2 ? a:2 : ''
diff --git a/autoload/neosnippet/mappings.vim b/autoload/neosnippet/mappings.vim
index 2f9f64c..7c6b13a 100644
--- a/autoload/neosnippet/mappings.vim
+++ b/autoload/neosnippet/mappings.vim
@@ -26,21 +26,21 @@
 let s:save_cpo = &cpo
 set cpo&vim
 
-function! neosnippet#mappings#expandable_or_jumpable() "{{{
+function! neosnippet#mappings#expandable_or_jumpable() abort "{{{
   return neosnippet#mappings#expandable() || neosnippet#mappings#jumpable()
 endfunction"}}}
-function! neosnippet#mappings#expandable() "{{{
+function! neosnippet#mappings#expandable() abort "{{{
   " Check snippet trigger.
   return neosnippet#helpers#get_cursor_snippet(
         \ neosnippet#helpers#get_snippets(), neosnippet#util#get_cur_text()) != ''
 endfunction"}}}
-function! neosnippet#mappings#jumpable() "{{{
+function! neosnippet#mappings#jumpable() abort "{{{
   " Found snippet placeholder.
   return search(neosnippet#get_placeholder_marker_pattern(). '\|'
             \ .neosnippet#get_sync_placeholder_marker_pattern(), 'nw') > 0
 endfunction"}}}
 
-function! neosnippet#mappings#_clear_select_mode_mappings() "{{{
+function! neosnippet#mappings#_clear_select_mode_mappings() abort "{{{
   if !g:neosnippet#disable_select_mode_mappings
     return
   endif
@@ -64,7 +64,7 @@ function! neosnippet#mappings#_clear_select_mode_mappings() "{{{
   snoremap <ESC>    <BS><ESC>
 endfunction"}}}
 
-function! neosnippet#mappings#_register_oneshot_snippet() "{{{
+function! neosnippet#mappings#_register_oneshot_snippet() abort "{{{
   let trigger = input('Please input snippet trigger: ', 'oneshot')
   if trigger == ''
     return
@@ -92,7 +92,7 @@ function! neosnippet#mappings#_register_oneshot_snippet() "{{{
   echo 'Registered trigger : ' . trigger
 endfunction"}}}
 
-function! neosnippet#mappings#_expand_target() "{{{
+function! neosnippet#mappings#_expand_target() abort "{{{
   let trigger = input('Please input snippet trigger: ',
         \ '', 'customlist,neosnippet#commands#_complete_target_snippets')
   let neosnippet = neosnippet#variables#current_neosnippet()
@@ -109,7 +109,7 @@ function! neosnippet#mappings#_expand_target() "{{{
 
   call neosnippet#mappings#_expand_target_trigger(trigger)
 endfunction"}}}
-function! neosnippet#mappings#_expand_target_trigger(trigger) "{{{
+function! neosnippet#mappings#_expand_target_trigger(trigger) abort "{{{
   let neosnippet = neosnippet#variables#current_neosnippet()
   let neosnippet.target = substitute(
         \ neosnippet#helpers#get_selected_text(visualmode(), 1), '\n$', '', '')
@@ -136,14 +136,14 @@ function! neosnippet#mappings#_expand_target_trigger(trigger) "{{{
   endif
 endfunction"}}}
 
-function! neosnippet#mappings#_anonymous(snippet) "{{{
+function! neosnippet#mappings#_anonymous(snippet) abort "{{{
   let [cur_text, col, expr] = neosnippet#mappings#_pre_trigger()
   let expr .= printf("\<ESC>:call neosnippet#view#_insert(%s, {}, %s, %d)\<CR>",
         \ string(a:snippet), string(cur_text), col)
 
   return expr
 endfunction"}}}
-function! neosnippet#mappings#_expand(trigger) "{{{
+function! neosnippet#mappings#_expand(trigger) abort "{{{
   let [cur_text, col, expr] = neosnippet#mappings#_pre_trigger()
 
   let expr .= printf("\<ESC>:call neosnippet#view#_expand(%s, %d, %s)\<CR>",
@@ -152,7 +152,7 @@ function! neosnippet#mappings#_expand(trigger) "{{{
   return expr
 endfunction"}}}
 
-function! s:snippets_expand(cur_text, col) "{{{
+function! s:snippets_expand(cur_text, col) abort "{{{
   let cur_word = neosnippet#helpers#get_cursor_snippet(
         \ neosnippet#helpers#get_snippets(),
         \ a:cur_text)
@@ -161,7 +161,7 @@ function! s:snippets_expand(cur_text, col) "{{{
         \ neosnippet#util#get_cur_text(), a:col, cur_word)
 endfunction"}}}
 
-function! s:snippets_expand_or_jump(cur_text, col) "{{{
+function! s:snippets_expand_or_jump(cur_text, col) abort "{{{
   let cur_word = neosnippet#helpers#get_cursor_snippet(
         \ neosnippet#helpers#get_snippets(), a:cur_text)
 
@@ -174,7 +174,7 @@ function! s:snippets_expand_or_jump(cur_text, col) "{{{
   endif
 endfunction"}}}
 
-function! s:snippets_jump_or_expand(cur_text, col) "{{{
+function! s:snippets_jump_or_expand(cur_text, col) abort "{{{
   let cur_word = neosnippet#helpers#get_cursor_snippet(
         \ neosnippet#helpers#get_snippets(), a:cur_text)
   if search(neosnippet#get_placeholder_marker_pattern(). '\|'
@@ -187,11 +187,11 @@ function! s:snippets_jump_or_expand(cur_text, col) "{{{
   endif
 endfunction"}}}
 
-function! s:SID_PREFIX() "{{{
+function! s:SID_PREFIX() abort "{{{
   return matchstr(expand('<sfile>'), '<SNR>\d\+_\ze\w\+$')
 endfunction"}}}
 
-function! neosnippet#mappings#_trigger(function) "{{{
+function! neosnippet#mappings#_trigger(function) abort "{{{
   let [cur_text, col, expr] = neosnippet#mappings#_pre_trigger()
 
   let expr .= printf("\<ESC>:call %s(%s,%d)\<CR>",
@@ -200,7 +200,7 @@ function! neosnippet#mappings#_trigger(function) "{{{
   return expr
 endfunction"}}}
 
-function! neosnippet#mappings#_pre_trigger() "{{{
+function! neosnippet#mappings#_pre_trigger() abort "{{{
   call neosnippet#init#check()
 
   let cur_text = neosnippet#util#get_cur_text()
@@ -223,22 +223,22 @@ function! neosnippet#mappings#_pre_trigger() "{{{
 endfunction"}}}
 
 " Plugin key-mappings.
-function! neosnippet#mappings#expand_or_jump_impl()
+function! neosnippet#mappings#expand_or_jump_impl() abort
   return mode() ==# 's' ?
         \ neosnippet#mappings#_trigger('neosnippet#view#_jump') :
         \ neosnippet#mappings#_trigger(
         \   s:SID_PREFIX().'snippets_expand_or_jump')
 endfunction
-function! neosnippet#mappings#jump_or_expand_impl()
+function! neosnippet#mappings#jump_or_expand_impl() abort
   return mode() ==# 's' ?
         \ neosnippet#mappings#_trigger('neosnippet#view#_jump') :
         \ neosnippet#mappings#_trigger(
         \   s:SID_PREFIX().'snippets_jump_or_expand')
 endfunction
-function! neosnippet#mappings#expand_impl()
+function! neosnippet#mappings#expand_impl() abort
   return neosnippet#mappings#_trigger(s:SID_PREFIX().'snippets_expand')
 endfunction
-function! neosnippet#mappings#jump_impl()
+function! neosnippet#mappings#jump_impl() abort
   return neosnippet#mappings#_trigger('neosnippet#view#_jump')
 endfunction
 
diff --git a/autoload/neosnippet/parser.vim b/autoload/neosnippet/parser.vim
index e939a19..02db170 100644
--- a/autoload/neosnippet/parser.vim
+++ b/autoload/neosnippet/parser.vim
@@ -28,7 +28,7 @@ set cpo&vim
 
 let s:Cache = neosnippet#util#get_vital().import('System.Cache')
 
-function! neosnippet#parser#_parse_snippets(filename) "{{{
+function! neosnippet#parser#_parse_snippets(filename) abort "{{{
   if !filereadable(a:filename)
     call neosnippet#util#print_error(
           \ printf('snippet file "%s" is not found.', a:filename))
@@ -49,7 +49,7 @@ function! neosnippet#parser#_parse_snippets(filename) "{{{
 
   return snippets
 endfunction"}}}
-function! neosnippet#parser#_parse_snippet(filename, trigger) "{{{
+function! neosnippet#parser#_parse_snippet(filename, trigger) abort "{{{
   if !filereadable(a:filename)
     call neosnippet#util#print_error(
           \ printf('snippet file "%s" is not found.', a:filename))
@@ -66,7 +66,7 @@ function! neosnippet#parser#_parse_snippet(filename, trigger) "{{{
         \ snippet_dict, a:filename, 1, '', a:trigger)
 endfunction"}}}
 
-function! s:parse(snippets_file) "{{{
+function! s:parse(snippets_file) abort "{{{
   let dup_check = {}
   let snippet_dict = {}
   let linenr = 1
@@ -138,7 +138,7 @@ function! s:parse(snippets_file) "{{{
   return [snippets, sourced]
 endfunction"}}}
 
-function! s:parse_snippet_name(snippets_file, line, linenr, dup_check) "{{{
+function! s:parse_snippet_name(snippets_file, line, linenr, dup_check) abort "{{{
   " Initialize snippet dict.
   let snippet_dict = {
         \ 'word' : '',
@@ -180,7 +180,7 @@ function! s:parse_snippet_name(snippets_file, line, linenr, dup_check) "{{{
   return snippet_dict
 endfunction"}}}
 
-function! s:add_snippet_attribute(snippets_file, line, linenr, snippet_dict) "{{{
+function! s:add_snippet_attribute(snippets_file, line, linenr, snippet_dict) abort "{{{
   " Allow overriding/setting of the description (abbr) of the snippet.
   " This will override what was set via the snippet line.
   if a:line =~ '^abbr\s'
@@ -221,7 +221,7 @@ function! s:add_snippet_attribute(snippets_file, line, linenr, snippet_dict) "{{
   endif
 endfunction"}}}
 
-function! s:set_snippet_dict(snippet_dict, snippets, dup_check, snippets_file) "{{{
+function! s:set_snippet_dict(snippet_dict, snippets, dup_check, snippets_file) abort "{{{
   if empty(a:snippet_dict)
     return
   endif
@@ -243,7 +243,7 @@ function! s:set_snippet_dict(snippet_dict, snippets, dup_check, snippets_file) "
   endfor
 endfunction"}}}
 
-function! neosnippet#parser#_initialize_snippet(dict, path, line, pattern, name) "{{{
+function! neosnippet#parser#_initialize_snippet(dict, path, line, pattern, name) abort "{{{
   let a:dict.word = substitute(a:dict.word, '\n\+$', '', '')
   if a:dict.word !~ '\n'
         \ && a:dict.word !~
@@ -282,7 +282,7 @@ function! neosnippet#parser#_initialize_snippet(dict, path, line, pattern, name)
   return snippet
 endfunction"}}}
 
-function! neosnippet#parser#_initialize_snippet_options() "{{{
+function! neosnippet#parser#_initialize_snippet_options() abort "{{{
   return {
         \ 'head' : 0,
         \ 'word' :
@@ -292,7 +292,7 @@ function! neosnippet#parser#_initialize_snippet_options() "{{{
         \ }
 endfunction"}}}
 
-function! neosnippet#parser#_get_completed_snippet(completed_item, next_text) "{{{
+function! neosnippet#parser#_get_completed_snippet(completed_item, next_text) abort "{{{
   let item = a:completed_item
 
   " Set abbr
diff --git a/autoload/neosnippet/util.vim b/autoload/neosnippet/util.vim
index 086edbb..75696f6 100644
--- a/autoload/neosnippet/util.vim
+++ b/autoload/neosnippet/util.vim
@@ -27,70 +27,70 @@ let s:save_cpo = &cpo
 set cpo&vim
 
 let s:V = vital#of('neosnippet')
-function! neosnippet#util#get_vital() "{{{
+function! neosnippet#util#get_vital() abort "{{{
   return s:V
 endfunction"}}}
-function! s:get_prelude() "{{{
+function! s:get_prelude() abort "{{{
   if !exists('s:Prelude')
     let s:Prelude = neosnippet#util#get_vital().import('Prelude')
   endif
   return s:Prelude
 endfunction"}}}
-function! s:get_list() "{{{
+function! s:get_list() abort "{{{
   if !exists('s:List')
     let s:List = neosnippet#util#get_vital().import('Data.List')
   endif
   return s:List
 endfunction"}}}
-function! s:get_string() "{{{
+function! s:get_string() abort "{{{
   if !exists('s:String')
     let s:String = neosnippet#util#get_vital().import('Data.String')
   endif
   return s:String
 endfunction"}}}
-function! s:get_process() "{{{
+function! s:get_process() abort "{{{
   if !exists('s:Process')
     let s:Process = neosnippet#util#get_vital().import('Process')
   endif
   return s:Process
 endfunction"}}}
 
-function! neosnippet#util#substitute_path_separator(...) "{{{
+function! neosnippet#util#substitute_path_separator(...) abort "{{{
   return call(s:get_prelude().substitute_path_separator, a:000)
 endfunction"}}}
-function! neosnippet#util#system(...) "{{{
+function! neosnippet#util#system(...) abort "{{{
   return call(s:get_process().system, a:000)
 endfunction"}}}
-function! neosnippet#util#has_vimproc(...) "{{{
+function! neosnippet#util#has_vimproc(...) abort "{{{
   return call(s:get_process().has_vimproc, a:000)
 endfunction"}}}
-function! neosnippet#util#is_windows(...) "{{{
+function! neosnippet#util#is_windows(...) abort "{{{
   return call(s:get_prelude().is_windows, a:000)
 endfunction"}}}
-function! neosnippet#util#is_mac(...) "{{{
+function! neosnippet#util#is_mac(...) abort "{{{
   return call(s:get_prelude().is_mac, a:000)
 endfunction"}}}
-function! neosnippet#util#get_last_status(...) "{{{
+function! neosnippet#util#get_last_status(...) abort "{{{
   return call(s:get_process().get_last_status, a:000)
 endfunction"}}}
-function! neosnippet#util#escape_pattern(...) "{{{
+function! neosnippet#util#escape_pattern(...) abort "{{{
   return call(s:get_prelude().escape_pattern, a:000)
 endfunction"}}}
-function! neosnippet#util#iconv(...) "{{{
+function! neosnippet#util#iconv(...) abort "{{{
   return call(s:get_process().iconv, a:000)
 endfunction"}}}
-function! neosnippet#util#truncate(...) "{{{
+function! neosnippet#util#truncate(...) abort "{{{
   return call(s:get_string().truncate, a:000)
 endfunction"}}}
-function! neosnippet#util#strwidthpart(...) "{{{
+function! neosnippet#util#strwidthpart(...) abort "{{{
   return call(s:get_string().strwidthpart, a:000)
 endfunction"}}}
 
-function! neosnippet#util#expand(path) "{{{
+function! neosnippet#util#expand(path) abort "{{{
   return neosnippet#util#substitute_path_separator(
         \ expand(escape(a:path, '*?[]"={}'), 1))
 endfunction"}}}
-function! neosnippet#util#set_default(var, val, ...)  "{{{
+function! neosnippet#util#set_default(var, val, ...) abort  "{{{
   let old_var = get(a:000, 0, '')
   if exists(old_var)
     let {a:var} = {old_var}
@@ -98,25 +98,25 @@ function! neosnippet#util#set_default(var, val, ...)  "{{{
     let {a:var} = a:val
   endif
 endfunction"}}}
-function! neosnippet#util#set_dictionary_helper(...) "{{{
+function! neosnippet#util#set_dictionary_helper(...) abort "{{{
   return call(s:get_prelude().set_dictionary_helper, a:000)
 endfunction"}}}
 
-function! neosnippet#util#get_cur_text() "{{{
+function! neosnippet#util#get_cur_text() abort "{{{
   return
         \ (mode() ==# 'i' ? (col('.')-1) : col('.')) >= len(getline('.')) ?
         \      getline('.') :
         \      matchstr(getline('.'),
         \         '^.*\%' . col('.') . 'c' . (mode() ==# 'i' ? '' : '.'))
 endfunction"}}}
-function! neosnippet#util#get_next_text() "{{{
+function! neosnippet#util#get_next_text() abort "{{{
   return getline('.')[len(neosnippet#util#get_cur_text()) :]
 endfunction"}}}
-function! neosnippet#util#print_error(string) "{{{
+function! neosnippet#util#print_error(string) abort "{{{
   echohl Error | echomsg '[neosnippet] ' . a:string | echohl None
 endfunction"}}}
 
-function! neosnippet#util#parse_options(args, options_list) "{{{
+function! neosnippet#util#parse_options(args, options_list) abort "{{{
   let args = []
   let options = {}
   for arg in split(a:args, '\%(\\\@<!\s\)\+')
@@ -154,13 +154,13 @@ function! neosnippet#util#get_buffer_config(
 endfunction"}}}
 
 " Sudo check.
-function! neosnippet#util#is_sudo() "{{{
+function! neosnippet#util#is_sudo() abort "{{{
   return $SUDO_USER != '' && $USER !=# $SUDO_USER
       \ && $HOME !=# expand('~'.$USER)
       \ && $HOME ==# expand('~'.$SUDO_USER)
 endfunction"}}}
 
-function! neosnippet#util#option2list(str) "{{{
+function! neosnippet#util#option2list(str) abort "{{{
   return type(a:str) == type('') ? split(a:str, '\s*,\s*') : a:str
 endfunction"}}}
 
diff --git a/autoload/neosnippet/variables.vim b/autoload/neosnippet/variables.vim
index eaf57ce..0413560 100644
--- a/autoload/neosnippet/variables.vim
+++ b/autoload/neosnippet/variables.vim
@@ -26,7 +26,7 @@
 let s:save_cpo = &cpo
 set cpo&vim
 
-function! neosnippet#variables#current_neosnippet() "{{{
+function! neosnippet#variables#current_neosnippet() abort "{{{
   if !exists('b:neosnippet')
     let b:neosnippet = {
           \ 'snippets' : {},
@@ -40,34 +40,34 @@ function! neosnippet#variables#current_neosnippet() "{{{
 
   return b:neosnippet
 endfunction"}}}
-function! neosnippet#variables#expand_stack() "{{{
+function! neosnippet#variables#expand_stack() abort "{{{
   if !exists('s:expand_stack')
     let s:expand_stack = []
   endif
 
   return s:expand_stack
 endfunction"}}}
-function! neosnippet#variables#pop_expand_stack() "{{{
+function! neosnippet#variables#pop_expand_stack() abort "{{{
   let s:expand_stack = s:expand_stack[: -2]
 endfunction"}}}
-function! neosnippet#variables#clear_expand_stack() "{{{
+function! neosnippet#variables#clear_expand_stack() abort "{{{
   let s:expand_stack = []
 endfunction"}}}
-function! neosnippet#variables#snippets() "{{{
+function! neosnippet#variables#snippets() abort "{{{
   if !exists('s:snippets')
     let s:snippets= {}
   endif
 
   return s:snippets
 endfunction"}}}
-function! neosnippet#variables#set_snippets(list) "{{{
+function! neosnippet#variables#set_snippets(list) abort "{{{
   if !exists('s:snippets')
     let s:snippets= {}
   endif
 
   let s:snippets = a:list
 endfunction"}}}
-function! neosnippet#variables#snippets_dir() "{{{
+function! neosnippet#variables#snippets_dir() abort "{{{
   " Set snippets_dir.
   let snippets_dir = []
   for dir in neosnippet#util#option2list(g:neosnippet#snippets_directory)
@@ -80,7 +80,7 @@ function! neosnippet#variables#snippets_dir() "{{{
 
   return map(snippets_dir, 'substitute(v:val, "[\\\\/]$", "", "")')
 endfunction"}}}
-function! neosnippet#variables#runtime_dir() "{{{
+function! neosnippet#variables#runtime_dir() abort "{{{
   " Set runtime dir.
   let runtime_dir = split(globpath(&runtimepath, 'neosnippets'), '\n')
   if empty(runtime_dir) && empty(g:neosnippet#disable_runtime_snippets)
@@ -100,7 +100,7 @@ function! neosnippet#variables#runtime_dir() "{{{
 
   return map(runtime_dir, 'substitute(v:val, "[\\\\/]$", "", "")')
 endfunction"}}}
-function! neosnippet#variables#data_dir() "{{{
+function! neosnippet#variables#data_dir() abort "{{{
   let g:neosnippet#data_directory =
         \ substitute(fnamemodify(get(
         \   g:, 'neosnippet#data_directory',
diff --git a/autoload/neosnippet/view.vim b/autoload/neosnippet/view.vim
index dccaad2..b344b74 100644
--- a/autoload/neosnippet/view.vim
+++ b/autoload/neosnippet/view.vim
@@ -26,7 +26,7 @@
 let s:save_cpo = &cpo
 set cpo&vim
 
-function! neosnippet#view#_expand(cur_text, col, trigger_name) "{{{
+function! neosnippet#view#_expand(cur_text, col, trigger_name) abort "{{{
   let snippets = neosnippet#helpers#get_snippets()
 
   if a:trigger_name == '' || !has_key(snippets, a:trigger_name)
@@ -48,7 +48,7 @@ function! neosnippet#view#_expand(cur_text, col, trigger_name) "{{{
 
   call neosnippet#view#_insert(snippet.snip, snippet.options, cur_text, a:col)
 endfunction"}}}
-function! neosnippet#view#_insert(snippet, options, cur_text, col) "{{{
+function! neosnippet#view#_insert(snippet, options, cur_text, col) abort "{{{
   let options = extend(
         \ neosnippet#parser#_initialize_snippet_options(),
         \ a:options)
@@ -132,7 +132,7 @@ function! neosnippet#view#_insert(snippet, options, cur_text, col) "{{{
     endif
   endtry
 endfunction"}}}
-function! neosnippet#view#_jump(_, col) "{{{
+function! neosnippet#view#_jump(_, col) abort "{{{
   try
     let expand_stack = neosnippet#variables#expand_stack()
 
@@ -176,7 +176,7 @@ function! neosnippet#view#_jump(_, col) "{{{
   endtry
 endfunction"}}}
 
-function! s:indent_snippet(begin, end) "{{{
+function! s:indent_snippet(begin, end) abort "{{{
   if a:begin > a:end
     return
   endif
@@ -215,7 +215,7 @@ function! s:indent_snippet(begin, end) "{{{
   endtry
 endfunction"}}}
 
-function! neosnippet#view#_get_snippet_range(begin_line, begin_patterns, end_line, end_patterns) "{{{
+function! neosnippet#view#_get_snippet_range(begin_line, begin_patterns, end_line, end_patterns) abort "{{{
   let pos = getpos('.')
 
   call cursor(a:begin_line, 0)
@@ -254,7 +254,7 @@ function! neosnippet#view#_get_snippet_range(begin_line, begin_patterns, end_lin
   call setpos('.', pos)
   return [begin, end]
 endfunction"}}}
-function! neosnippet#view#_search_snippet_range(start, end, cnt, ...) "{{{
+function! neosnippet#view#_search_snippet_range(start, end, cnt, ...) abort "{{{
   let is_select = get(a:000, 0, 1)
   call s:substitute_placeholder_marker(a:start, a:end, a:cnt)
 
@@ -277,7 +277,7 @@ function! neosnippet#view#_search_snippet_range(start, end, cnt, ...) "{{{
 
   return 0
 endfunction"}}}
-function! neosnippet#view#_search_outof_range(col) "{{{
+function! neosnippet#view#_search_outof_range(col) abort "{{{
   call s:substitute_placeholder_marker(1, 0, 0)
 
   let pattern = neosnippet#get_placeholder_marker_pattern()
@@ -302,7 +302,7 @@ function! neosnippet#view#_search_outof_range(col) "{{{
   " Not found.
   return 0
 endfunction"}}}
-function! neosnippet#view#_clear_markers(expand_info) "{{{
+function! neosnippet#view#_clear_markers(expand_info) abort "{{{
   " Search patterns.
   let [begin, end] = neosnippet#view#_get_snippet_range(
         \ a:expand_info.begin_line,
@@ -338,7 +338,7 @@ function! neosnippet#view#_clear_markers(expand_info) "{{{
     call neosnippet#variables#pop_expand_stack()
   endtry
 endfunction"}}}
-function! s:expand_placeholder(start, end, holder_cnt, line, ...) "{{{
+function! s:expand_placeholder(start, end, holder_cnt, line, ...) abort "{{{
   let is_select = get(a:000, 0, 1)
 
   let pattern = substitute(neosnippet#get_placeholder_marker_pattern(),
@@ -424,7 +424,7 @@ function! s:expand_placeholder(start, end, holder_cnt, line, ...) "{{{
     startinsert!
   endif
 endfunction"}}}
-function! s:expand_target_placeholder(line, col) "{{{
+function! s:expand_target_placeholder(line, col) abort "{{{
   " Expand target
   let neosnippet = neosnippet#variables#current_neosnippet()
   let next_line = getline(a:line)[a:col-1 :]
@@ -484,7 +484,7 @@ function! s:expand_target_placeholder(line, col) "{{{
 
   call neosnippet#view#_jump('', col)
 endfunction"}}}
-function! s:search_sync_placeholder(start, end, number) "{{{
+function! s:search_sync_placeholder(start, end, number) abort "{{{
   if a:end == 0
     " Search in current buffer.
     let cnt = matchstr(getline('.'),
@@ -505,7 +505,7 @@ function! s:search_sync_placeholder(start, end, number) "{{{
 
   return -1
 endfunction"}}}
-function! s:substitute_placeholder_marker(start, end, snippet_holder_cnt) "{{{
+function! s:substitute_placeholder_marker(start, end, snippet_holder_cnt) abort "{{{
   if a:snippet_holder_cnt > 0
     let cnt = a:snippet_holder_cnt-1
     let sync_marker = substitute(neosnippet#get_sync_placeholder_marker_pattern(),
@@ -541,7 +541,7 @@ function! s:substitute_placeholder_marker(start, end, snippet_holder_cnt) "{{{
     call setline('.', substitute(getline('.'), sync_marker, sub, ''))
   endif
 endfunction"}}}
-function! s:eval_snippet(snippet_text) "{{{
+function! s:eval_snippet(snippet_text) abort "{{{
   let snip_word = ''
   let prev_match = 0
   let match = match(a:snippet_text, '\\\@<!`.\{-}\\\@<!`')
@@ -563,7 +563,7 @@ function! s:eval_snippet(snippet_text) "{{{
 
   return snip_word
 endfunction"}}}
-function! s:skip_next_auto_completion() "{{{
+function! s:skip_next_auto_completion() abort "{{{
   " Skip next auto completion.
   let neosnippet = neosnippet#variables#current_neosnippet()
   let neosnippet.trigger = 0
diff --git a/autoload/unite/sources/neosnippet.vim b/autoload/unite/sources/neosnippet.vim
index 8aca763..4b0afc5 100644
--- a/autoload/unite/sources/neosnippet.vim
+++ b/autoload/unite/sources/neosnippet.vim
@@ -26,7 +26,7 @@
 let s:save_cpo = &cpo
 set cpo&vim
 
-function! unite#sources#neosnippet#define() "{{{
+function! unite#sources#neosnippet#define() abort "{{{
   let kind = {
         \ 'name' : 'neosnippet',
         \ 'default_action' : 'expand',
@@ -46,14 +46,14 @@ let s:source = {
       \ 'action_table' : {},
       \ }
 
-function! s:source.hooks.on_init(args, context) "{{{
+function! s:source.hooks.on_init(args, context) abort "{{{
   let a:context.source__cur_keyword_pos =
         \ s:get_keyword_pos(neosnippet#util#get_cur_text())
   let a:context.source__snippets =
         \ sort(values(neosnippet#helpers#get_completion_snippets()))
 endfunction"}}}
 
-function! s:source.gather_candidates(args, context) "{{{
+function! s:source.gather_candidates(args, context) abort "{{{
   return map(copy(a:context.source__snippets), "{
         \   'word' : v:val.word,
         \   'abbr' : printf('%-50s %s', v:val.word, v:val.menu_abbr),
@@ -74,7 +74,7 @@ let s:action_table = {}
 let s:action_table.expand = {
       \ 'description' : 'expand snippet',
       \ }
-function! s:action_table.expand.func(candidate) "{{{
+function! s:action_table.expand.func(candidate) abort "{{{
   let cur_text = neosnippet#util#get_cur_text()
   let cur_keyword_str = matchstr(cur_text, '\S\+$')
   let context = unite#get_context()
@@ -88,7 +88,7 @@ let s:action_table.preview = {
       \ 'is_selectable' : 1,
       \ 'is_quit' : 0,
       \ }
-function! s:action_table.preview.func(candidates) "{{{
+function! s:action_table.preview.func(candidates) abort "{{{
   for snip in a:candidates
     echohl String
     echo snip.action__complete_word
@@ -102,7 +102,7 @@ let s:action_table.unite__new_candidate = {
       \ 'description' : 'add new snippet',
       \ 'is_quit' : 1,
       \ }
-function! s:action_table.unite__new_candidate.func(candidate) "{{{
+function! s:action_table.unite__new_candidate.func(candidate) abort "{{{
   let trigger = unite#util#input('Please input snippet trigger: ')
   if trigger == ''
     echo 'Canceled.'
@@ -136,7 +136,7 @@ let s:source.action_table = s:action_table
 unlet! s:action_table
 "}}}
 
-function! unite#sources#neosnippet#start_complete() "{{{
+function! unite#sources#neosnippet#start_complete() abort "{{{
   if !exists(':Unite')
     call neosnippet#util#print_error(
           \ 'unite.vim is not installed.')
@@ -149,7 +149,7 @@ function! unite#sources#neosnippet#start_complete() "{{{
         \ { 'input': neosnippet#util#get_cur_text(), 'buffer_name' : '' })
 endfunction "}}}
 
-function! s:get_keyword_pos(cur_text) "{{{
+function! s:get_keyword_pos(cur_text) abort "{{{
   let cur_keyword_pos = match(a:cur_text, '\S\+$')
   if cur_keyword_pos < 0
     " Empty string.
diff --git a/autoload/unite/sources/neosnippet_file.vim b/autoload/unite/sources/neosnippet_file.vim
index 666e1af..d63107d 100644
--- a/autoload/unite/sources/neosnippet_file.vim
+++ b/autoload/unite/sources/neosnippet_file.vim
@@ -26,7 +26,7 @@
 let s:save_cpo = &cpo
 set cpo&vim
 
-function! unite#sources#neosnippet_file#define() "{{{
+function! unite#sources#neosnippet_file#define() abort "{{{
   return [s:source_user, s:source_runtime]
 endfunction "}}}
 
@@ -37,7 +37,7 @@ let s:action_table.neosnippet_source = {
       \ 'is_selectable' : 1,
       \ 'is_quit' : 1,
       \ }
-function! s:action_table.neosnippet_source.func(candidates) "{{{
+function! s:action_table.neosnippet_source.func(candidates) abort "{{{
   for candidate in a:candidates
     let snippet_name = candidate.action__path
     if snippet_name != ''
@@ -52,7 +52,7 @@ let s:source_user = {
       \ 'description' : 'neosnippet user file',
       \ 'action_table' : copy(s:action_table),
       \ }
-function! s:source_user.gather_candidates(args, context) "{{{
+function! s:source_user.gather_candidates(args, context) abort "{{{
   return s:get_snippet_candidates(
         \ neosnippet#get_user_snippets_directory())
 endfunction "}}}
@@ -62,7 +62,7 @@ let s:source_user.action_table.unite__new_candidate = {
       \ 'is_invalidate_cache' : 1,
       \ 'is_quit' : 1,
       \ }
-function! s:source_user.action_table.unite__new_candidate.func(candidate) "{{{
+function! s:source_user.action_table.unite__new_candidate.func(candidate) abort "{{{
   let filename = input(
         \ 'New snippet file name: ', neosnippet#helpers#get_filetype())
   if filename != ''
@@ -77,7 +77,7 @@ let s:source_runtime = {
       \ 'description' : 'neosnippet runtime file',
       \ 'action_table' : copy(s:action_table),
       \ }
-function! s:source_runtime.gather_candidates(args, context) "{{{
+function! s:source_runtime.gather_candidates(args, context) abort "{{{
   return s:get_snippet_candidates(
         \ neosnippet#get_runtime_snippets_directory())
 endfunction "}}}
@@ -87,7 +87,7 @@ let s:source_runtime.action_table.unite__new_candidate = {
       \ 'is_invalidate_cache' : 1,
       \ 'is_quit' : 1,
       \ }
-function! s:source_runtime.action_table.unite__new_candidate.func(candidate) "{{{
+function! s:source_runtime.action_table.unite__new_candidate.func(candidate) abort "{{{
   let filename = input(
         \ 'New snippet file name: ', neosnippet#helpers#get_filetype())
   if filename != ''
@@ -96,7 +96,7 @@ function! s:source_runtime.action_table.unite__new_candidate.func(candidate) "{{
 endfunction"}}}
 
 
-function! s:get_snippet_candidates(dirs) "{{{
+function! s:get_snippet_candidates(dirs) abort "{{{
   let _ = []
   for directory in a:dirs
     let _ += map(split(unite#util#substitute_path_separator(
diff --git a/autoload/vim_snippets.vim b/autoload/vim_snippets.vim
index 3156a56..6d540df 100644
--- a/autoload/vim_snippets.vim
+++ b/autoload/vim_snippets.vim
@@ -1,5 +1,5 @@
 " For honza-snippets function.
-function! vim_snippets#Filename(...)
+function! vim_snippets#Filename(...) abort
   let filename = expand('%:t:r')
   if filename == ''
     return a:0 == 2 ? a:2 : ''
diff --git a/indent/neosnippet.vim b/indent/neosnippet.vim
index 404fe40..a55d1f2 100644
--- a/indent/neosnippet.vim
+++ b/indent/neosnippet.vim
@@ -40,7 +40,7 @@ endif
 
 setlocal indentexpr=SnippetsIndent()
 
-function! SnippetsIndent() "{{{
+function! SnippetsIndent() abort "{{{
     let line = getline('.')
     let prev_line = (line('.') == 1)? '' : getline(line('.')-1)
     let syntax = '\%(include\|snippet\|abbr\|prev_word\|delete\|alias\|options\|regexp\)'
diff --git a/test/functions.vim b/test/functions.vim
index 828f8ea..ec86f48 100644
--- a/test/functions.vim
+++ b/test/functions.vim
@@ -1,7 +1,7 @@
 let s:suite = themis#suite('toml')
 let s:assert = themis#helper('assert')
 
-function! s:suite.get_in_paren()
+function! s:suite.get_in_paren() abort
   call s:assert.equals(neosnippet#parser#_get_in_paren(
         \ '(', ')',
         \ '(foobar)'),
@@ -32,7 +32,7 @@ function! s:suite.get_in_paren()
         \ 'long, int')
 endfunction
 
-function! s:suite.get_completed_snippet()
+function! s:suite.get_completed_snippet() abort
   call s:assert.equals(neosnippet#parser#_get_completed_snippet({
         \ 'word' : 'foo(', 'abbr' : 'foo()',
         \ 'menu' : '', 'info' : ''