Added preliminary support for neocomplete.

Patch by lervag. Closes #228

autoload/neocomplete/sources/ultisnips.vim

@@ -0,0 +1,16 @@
+let s:source = {
+      \ 'name' : 'ultisnips',
+      \ 'kind' : 'manual',
+      \ 'mark' : '[U]',
+      \ 'min_pattern_length' : 1,
+      \ 'is_volatile' : 1,
+      \ 'rank' : 10,
+      \}
+
+function! s:source.gather_candidates(context)
+  return keys(UltiSnips#SnippetsInCurrentScope())
+endfunction
+
+function! neocomplete#sources#ultisnips#define()
+  return s:source
+endfunction

doc/UltiSnips.txt

@@ -1367,6 +1367,7 @@ individuals have contributed to UltiSnips (in chronological order):
    Brian Mock - saikobee
    Gernot Höflechner - LFDM
    Marcelo D Montu - mMontu
+   Karl Yngve Lervåg - lervag
 
 Thank you for your support.
 

pythonx/UltiSnips/snippet/definition/_base.py

@@ -8,6 +8,7 @@ import re
 from UltiSnips import _vim
 from UltiSnips.compatibility import as_unicode
 from UltiSnips.indent_util import IndentUtil
+from UltiSnips.text import escape
 from UltiSnips.text_objects import SnippetInstance
 
 def _words_for_line(trigger, before, num_words=None):
@@ -115,8 +116,7 @@ class SnippetDefinition(object):
             match = (words_suffix == self._trigger)
             if match and words_prefix:
                 # Require a word boundary between prefix and suffix.
-                boundary_chars = words_prefix[-1:] + words_suffix[:1]
+                boundary_chars = escape(words_prefix[-1:] + words_suffix[:1], r'\"')
-                boundary_chars = boundary_chars.replace('"', '\\"')
                 match = _vim.eval('"%s" =~# "\\\\v.<."' % boundary_chars) != '0'
         elif "i" in self._opts:
             match = words.endswith(self._trigger)
@@ -152,7 +152,7 @@ class SnippetDefinition(object):
             match = self._re_match(trigger)
         elif "w" in self._opts:
             # Trim non-empty prefix up to word boundary, if present.
-            qwords = words.replace('"', '\\"')
+            qwords = escape(words, r'\"')
             words_suffix = _vim.eval(
                     'substitute("%s", "\\\\v^.+<(.+)", "\\\\1", "")' % qwords)
             match = self._trigger.startswith(words_suffix)

pythonx/UltiSnips/text.py

@@ -16,6 +16,16 @@ def unescape(text):
         i += 1
     return rv
 
+def escape(text, chars):
+    """Escapes all characters in 'chars' in text using backspaces."""
+    rv = ""
+    for char in text:
+        if char in chars:
+            rv += '\\'
+        rv += char
+    return rv
+
+
 def fill_in_whitespace(text):
     """Returns 'text' with escaped whitespace replaced through whitespaces."""
     text = text.replace(r"\n", "\n")

test.py

@@ -3324,11 +3324,28 @@ class YouCompleteMe_IntegrationTest(_VimTest):
         self.vim.send(":set ft=python\n")
         # Give ycm a chance to catch up.
         time.sleep(1)
-
-
-
 # End: Plugin: YouCompleteMe  #}}}
 
+# Plugin: Neocomplete {{{#
+class Neocomplete_BugTest(_VimTest):
+    # Test for https://github.com/SirVer/ultisnips/issues/228
+    def skip_if(self):
+        if "+lua" not in self.version:
+            return "Needs +lua"
+    plugins = ["Shougo/neocomplete.vim"]
+    snippets = ("t", "Hello", "", "w")
+    keys = "iab\\ t" + EX
+    wanted = "iab\\ Hello"
+
+    def _extra_options(self, vim_config):
+        vim_config.append(r'set iskeyword+=\\ ')
+        vim_config.append('let g:neocomplete#enable_at_startup = 1')
+        vim_config.append('let g:neocomplete#enable_smart_case = 1')
+        vim_config.append('let g:neocomplete#enable_camel_case = 1')
+        vim_config.append('let g:neocomplete#enable_auto_delimiter = 1')
+        vim_config.append('let g:neocomplete#enable_refresh_always = 1')
+# End: Plugin: Neocomplete  #}}}
+
 ###########################################################################
 #                               END OF TEST                               #
 ###########################################################################