Unexpected behavior: jumping between markers

[fastbodin]

Problem Summary When dealing with multiple nested snippets, the order of the markers seems to get indexed wrong.

Steps to reproduce

1. Use the following minimal vimrc

   
   set nocompatible
   set runtimepath+=~/path/to/neosnippet.vim/
   filetype plugin indent on
   let g:neocomplete#enable_at_startup = 1
   let g:neosnippet#snippets_directory = '~/snippets'

imap neosnippet#expandable_or_jumpable() ? "\(neosnippet_expand_or_jump)" : (pumvisible() ? "\" : "\") smap neosnippet#expandable_or_jumpable() ? "\(neosnippet_expand_or_jump)" : "\"

2. Input the following snippets into a plaintex.snippets file in ~/snippets

snippet equn abbr "Equation" \begin{equation${1}} ${2} &= ${3} \\ ${4} \end{equation$1} ${5}

snippet br abbr "( ) - bracket" \left( ${1} \right) ${2}

snippet frac abbr "Fraction" \frac{${1}}{${2}} ${3}

3. Run nvim test.tex
4. Type the following keystrokes

equn br frac

**Expected behavior**
Everything is fine up to

equn br frac

I would expect the following key strokes would take the cursor to the following markers
* TAB -> '<2>'
* TAB -> '<3>'
* TAB -> '<4>'
* TAB -> '<5>'

**Actual behavior**
The fourth TAB after 'frac' should have gone to marker '<2>' but instead when to marker '<4>'.  The following four keystrokes take the cursor to the following markers out of the expected order
* TAB -> '<4>'
* TAB -> '<2>'
* TAB -> '<3>'
* TAB -> '<5>'

There seems to be a problem with nesting snippets. It may be how I have defined them?

**Environment Information**
* OS: macOS High Sierra version 10.13.3
* neovim/Vim version: NVIM v0.2.2
* Neosnippet version: Version: 5.0

**:CheckHealth Output**

health#nvim#check

Configuration

• OK: no issues found

Performance

• OK: Build type: Release

Remote Plugins

• OK: Up to date

terminal

• INFO: key_backspace (kbs) terminfo entry: key_backspace=^H
• INFO: key_dc (kdch1) terminfo entry: key_dc=\E[3~
• INFO: $XTERM_VERSION=''
• INFO: $VTE_VERSION=''
• INFO: $SSH_TTY=''

health#provider#check

Clipboard (optional)

• OK: Clipboard tool found: pbcopy

Python 2 provider (optional)

• INFO: g:python_host_prog is not set. Searching for python2 in the environment.
• INFO: Executable: /usr/local/opt/python@2/bin/python2
• INFO: Python2 version: 2.7.14
• INFO: python2-neovim version: 0.2.4
• OK: Latest python2-neovim is installed: 0.2.4

Python 3 provider (optional)

• INFO: g:python3_host_prog is not set. Searching for python3 in the environment.
• INFO: Executable: /usr/local/bin/python3
• INFO: Python3 version: 3.6.4
• INFO: python3-neovim version: 0.2.4
• OK: Latest python3-neovim is installed: 0.2.4

Ruby provider (optional)

• INFO: Ruby: ruby 2.5.0p0 (2017-12-25 revision 61468) [x86_64-darwin17]
• WARNING: Missing "neovim" gem.
  • ADVICE:
    • Run in shell: gem install neovim
    • Is the gem bin directory in $PATH? Check gem environment.
    • If you are using rvm/rbenv/chruby, try "rehashing".

Node provider (optional)

• WARNING: node and npm must be in $PATH.
  • ADVICE:
    • Install Node.js and verify that node and npm commands work.

Screen shots

[Shougo]

Sorry. I don't fix the problem.

The nested behavior is hard to fix.

[fastbodin]

Understood. Thanks for the quick response.

[Shougo]

I should implement deoppet.nvim(the next snippet plugin) instead. I have not much time now though.

[fastbodin]

I was going to ask whether this sort of functionality would likely be implemented in deoppet.nvim. I appreciate your work. I have been looking forward to eventually using deoppet.nvim. Just have been unsure when would be best to make the conversion over.

[Shougo]

Of course, deoppet.nvim should support nested snippet expansion without markers. I think it is possible.

Current neosnippet has very many features. It takes more time. And I have other plugins development. Especially, deoplete.

[fastbodin]

I understand. Il also use deoplete so I appreciate your work there!

Il keep my eye on deoppet.nvim