Add cpo guard

Close #3

autoload/clap.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: Primiary code path for the plugin.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 if has('nvim')
   let s:has_features = has('nvim-0.4')
 else
@@ -189,3 +192,6 @@ function! clap#(bang, ...) abort
 
   call clap#for(provider_id_or_alias)
 endfunction
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/debugging.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: Gather some info useful for debugging.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 function! s:get_global_variables() abort
   let variable_list = []
 
@@ -54,3 +57,6 @@ function! clap#debugging#info_to_clipboard() abort
   echohl Function | echon 'Vim-clap info'             | echohl NONE
   echohl Normal   | echon ' copied to your clipboard' | echohl NONE
 endfunction
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/floating_win.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: Neovim floating_win UI.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let g:clap#floating_win#input = {}
 let g:clap#floating_win#display = {}
 let g:clap#floating_win#spinner = {}
@@ -196,3 +199,6 @@ function! clap#floating_win#close() abort
   " thus I have to go back to the start window in grep.vim
   noautocmd call clap#util#nvim_win_close_safe(g:clap.display.winid)
 endfunction
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/handler.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: Handle the movement.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:old_input = ''
 let s:support_multi_selection = v:false
 let s:use_multi_selection = v:false
@@ -125,3 +128,6 @@ function! clap#handler#select_toggle() abort
 
   return ''
 endfunction
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/icon.vim

@@ -168,3 +168,6 @@ function! clap#icon#get_all() abort
   call add(all, g:clap#icon#default)
   return uniq(all)
 endfunction
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/impl.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: Default implementation for various hooks.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:is_nvim = has('nvim')
 
 let s:NO_MATCHES = 'NO MATCHES FOUND'
@@ -85,3 +88,6 @@ function! clap#impl#on_typed() abort
 
   call g:clap.display.add_highlight()
 endfunction
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/indicator.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: Matches indicator.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 if has('nvim')
   let s:ns_id = nvim_create_namespace('clap')
 
@@ -36,3 +39,6 @@ function! clap#indicator#set_matches(indicator) abort
   " endif
   call s:apply_indicator(a:indicator)
 endfunction
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/init.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: Initialize and make a compatible layer between neovim and vim.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:is_nvim = has('nvim')
 
 function! s:_goto_win() dict abort
@@ -448,3 +451,6 @@ function! clap#init#() abort
     let g:clap.close_win = function('clap#popup#close')
   endif
 endfunction
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/popup.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: Vim popup UI and interaction.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:input = ''
 let s:input_timer = -1
 
@@ -376,3 +379,6 @@ function! clap#popup#close() abort
   call s:hide_all()
   silent autocmd! ClapEnsureAllClosed
 endfunction
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/provider/bcommits.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: List the buffer commits.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:bcommits = {}
 
 function! s:bcommits.source() abort
@@ -12,3 +15,6 @@ function! s:bcommits.sink(line) abort
 endfunction
 
 let g:clap#provider#bcommits# = s:bcommits
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/provider/blines.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: List the buffer lines.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:blines = {}
 
 function! s:blines.sink(selected) abort
@@ -22,3 +25,6 @@ function! s:blines.on_enter() abort
 endfunction
 
 let g:clap#provider#blines# = s:blines
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/provider/buffers.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: List the open buffers.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 " TODO more fancy buffers, e.g., append icon.
 function! s:buffers() abort
   redir => l:buffers
@@ -27,3 +30,6 @@ let s:buffers.source = function('s:buffers')
 let s:buffers.on_enter = function('s:buffers_on_enter')
 
 let g:clap#provider#buffers# = s:buffers
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/provider/colors.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: List the colorschemes.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:colors = {}
 
 " Derived from fzf.vim
@@ -46,3 +49,6 @@ function! s:colors.on_exit() abort
 endfunction
 
 let g:clap#provider#colors# = s:colors
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/provider/command_history.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: List the command history.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 " Derived from fzf.vim
 function! s:command_history() abort
   let max  = histnr(':')
@@ -35,3 +38,6 @@ let s:command_history.source = function('s:command_history_source')
 let s:command_history.on_enter = { -> g:clap.display.setbufvar('&ft', 'clap_command_history') }
 
 let g:clap#provider#command_history# = s:command_history
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/provider/commits.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: List the commits.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:commits = {}
 
 function! s:commits.source() abort
@@ -38,3 +41,6 @@ endfunction
 let s:commits.on_enter = { -> g:clap.display.setbufvar('&ft', 'clap_commits') }
 
 let g:clap#provider#commits# = s:commits
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/provider/files.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: List the files.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:files = {}
 
 function! s:chain_try() abort
@@ -27,3 +30,6 @@ endif
 let s:files.sink = 'e'
 
 let g:clap#provider#files# = s:files
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/provider/filetypes.vim

@@ -1,9 +1,15 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: List the filetypes.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:filetypes = {}
 
 let s:filetypes.source = uniq(sort(map(split(globpath(&rtp, 'syntax/*.vim'), '\n'), 'fnamemodify(v:val, ":t:r")')))
 let s:filetypes.sink = 'setf'
 
 let g:clap#provider#filetypes# = s:filetypes
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/provider/git_files.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: List the files managed by git.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:git_files = {}
 
 if executable('git')
@@ -12,3 +15,6 @@ endif
 let s:git_files.sink = 'e'
 
 let g:clap#provider#git_files# = s:git_files
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/provider/grep.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: Grep on the fly with smart cache strategy in async way.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:grep_delay = get(g:, 'clap_provider_grep_delay', 500)
 
 let s:old_query = ''
@@ -330,3 +333,6 @@ let s:grep.jobstop = function('s:jobstop')
 let s:grep.on_exit = function('s:grep_exit')
 
 let g:clap#provider#grep# = s:grep
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/provider/jumps.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: List the jump list with the preview.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:jumps = {}
 
 function! s:jumps.source() abort
@@ -31,3 +34,6 @@ function! s:jumps.sink(line) abort
 endfunction
 
 let g:clap#provider#jumps# = s:jumps
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/provider/marks.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: List the marks.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:marks = {}
 
 function! s:format_mark(line)
@@ -20,3 +23,6 @@ function! s:marks.sink(line)
 endfunction
 
 let g:clap#provider#marks# = s:marks
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/provider/registers.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: List the register list with the preview.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:registers = {}
 
 function! s:registers.source() abort
@@ -12,3 +15,6 @@ function! s:registers.sink(line) abort
 endfunction
 
 let g:clap#provider#registers# = s:registers
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/provider/tags.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: List the tags based on vista.vim.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:tags = {}
 
 function! s:tags.source(...) abort
@@ -17,3 +20,6 @@ let s:tags.sink = function('vista#finder#fzf#sink')
 let s:tags.on_enter = { -> g:clap.display.setbufvar('&ft', 'clap_tags') }
 
 let g:clap#provider#tags# = s:tags
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

autoload/clap/provider/windows.vim

@@ -1,6 +1,9 @@
 " Author: liuchengxu <xuliuchengxlc@gmail.com>
 " Description: List the windows.
 
+let s:save_cpo = &cpo
+set cpo&vim
+
 let s:windows = {}
 
 function! s:jump(t, w)
@@ -39,3 +42,6 @@ function! s:windows.sink(line)
 endfunction
 
 let g:clap#provider#windows# = s:windows
+
+let &cpo = s:save_cpo
+unlet s:save_cpo