Problems with neocomplcache integration (related to g:SuperTabCrMapping) about supertab

[ervandew]

There are a couple of issues here:

1. Both the supertab mapping and your neocomplcache mapping are attempting to do the same thing, insert the highlighted completion and exit completion mode. Since the neocomplcache version is clearing some internal variables I'd suggest turning off supertab's version and using the neocomplcache version.
2. You're attempting to tack on a trailing to an expression mapping which is what is causing other plugins which have mapped and who support attempting to chain those mappings (supertab and endwise are the only two I can think of that do this) to attempt to tack the expression mapping rhs onto their mapping. The problem is that not until the past few months did vim start exposing this info regarding a mapping, so supertab and endwise are not built to handle expression mappings. You can work around this issue by turning that expression mapping into a regular mapping as shown below.

Note: I did write the following function to be somewhat compatible with supertab, but since supertab puts itself at the head of the mapping when chaining, I don't think neocomplcache#close_popup would actually ever be called. But this function/mapping do play nice with endwise.

function s:Wrap()
  if pumvisible()
    return neocomplcache#close_popup()
  endif
  return exists('b:supertab_pumwasvisible') ? '' : "\<cr>"
endfunction
imap <cr> <c-r>=<SID>Wrap()<cr>

[zhuangya]

please read: Shougo/neocomplcache.vim#88 (comment)