From fef60dbe6ceea3d5786e7c74f4e1c216de170011 Mon Sep 17 00:00:00 2001
From: Shougo Matsushita <Shougo.Matsu@gmail.com>
Date: Sat, 19 Dec 2015 12:27:49 +0900
Subject: [PATCH] Improve auto placeholder feature

---
 autoload/neosnippet.vim        | 3 +++
 autoload/neosnippet/parser.vim | 8 ++++++++
 2 files changed, 11 insertions(+)

diff --git a/autoload/neosnippet.vim b/autoload/neosnippet.vim
index f1aeec9..5e6d6a6 100644
--- a/autoload/neosnippet.vim
+++ b/autoload/neosnippet.vim
@@ -86,6 +86,9 @@ endfunction"}}}
 function! neosnippet#get_placeholder_marker_substitute_nonzero_pattern() "{{{
   return '\${\([1-9]\d*\%(:.\{-}\)\?\\\@<!\)}'
 endfunction"}}}
+function! neosnippet#get_placeholder_marker_substitute_zero_pattern() "{{{
+  return '\${\(0\%(:.\{-}\)\?\\\@<!\)}'
+endfunction"}}}
 function! neosnippet#get_placeholder_marker_default_pattern() "{{{
   return '<`\d\+:\zs.\{-}\ze\\\@<!`>'
 endfunction"}}}
diff --git a/autoload/neosnippet/parser.vim b/autoload/neosnippet/parser.vim
index 4369ef3..c3c4cbd 100644
--- a/autoload/neosnippet/parser.vim
+++ b/autoload/neosnippet/parser.vim
@@ -238,6 +238,14 @@ endfunction"}}}
 
 function! neosnippet#parser#_initialize_snippet(dict, path, line, pattern, name) "{{{
   let a:dict.word = substitute(a:dict.word, '\n\+$', '', '')
+  if a:dict.word !~ '\n'
+        \ && a:dict.word !~
+        \    neosnippet#get_placeholder_marker_substitute_pattern().'$'
+        \ && a:dict.word !~
+        \    neosnippet#get_placeholder_marker_substitute_zero_pattern()
+    " Add placeholder.
+    let a:dict.word .= '${0}'
+  endif
 
   if !has_key(a:dict, 'abbr') || a:dict.abbr == ''
     " Set default abbr.