================================================================================
Basic
================================================================================

au BufNewFile *.html echo "foo"
au! BufNewFile *.html echo "foo"
autocmd BufNewFile *.html echo "foo"
autocmd! BufNewFile *.html echo "foo"

--------------------------------------------------------------------------------

(script_file
  (autocmd_statement
    (au_event_list
      (au_event))
    (pattern)
    (echo_statement
      (string_literal)))
  (autocmd_statement
    (bang)
    (au_event_list
      (au_event))
    (pattern)
    (echo_statement
      (string_literal)))
  (autocmd_statement
    (au_event_list
      (au_event))
    (pattern)
    (echo_statement
      (string_literal)))
  (autocmd_statement
    (bang)
    (au_event_list
      (au_event))
    (pattern)
    (echo_statement
      (string_literal))))

================================================================================
No arguments
================================================================================

au
autocmd
au!
autocmd!

--------------------------------------------------------------------------------

(script_file
  (autocmd_statement)
  (autocmd_statement)
  (autocmd_statement
    (bang))
  (autocmd_statement
    (bang)))

================================================================================
Autocmd only group
================================================================================

au SingleGroup
au! SingleGroup
autocmd single_group
autocmd! single_group

--------------------------------------------------------------------------------

(script_file
  (autocmd_statement
    (augroup_name))
  (autocmd_statement
    (bang)
    (augroup_name))
  (autocmd_statement
    (augroup_name))
  (autocmd_statement
    (bang)
    (augroup_name)))

================================================================================
Autocmd with once and nested
================================================================================

au BufEnter *.html ++once echo "html or json"
au! BufEnter *.html ++once echo "html or json"
au BufEnter *.html ++nested echo "html or json"
au! BufEnter *.html ++nested echo "html or json"

--------------------------------------------------------------------------------

(script_file
  (autocmd_statement
    (au_event_list
      (au_event))
    (pattern)
    (au_once)
    (echo_statement
      (string_literal)))
  (autocmd_statement
    (bang)
    (au_event_list
      (au_event))
    (pattern)
    (au_once)
    (echo_statement
      (string_literal)))
  (autocmd_statement
    (au_event_list
      (au_event))
    (pattern)
    (au_nested)
    (echo_statement
      (string_literal)))
  (autocmd_statement
    (bang)
    (au_event_list
      (au_event))
    (pattern)
    (au_nested)
    (echo_statement
      (string_literal))))

================================================================================
Autocmd only event/pattern
================================================================================

au BufEnter html
au! BufEnter html
au bufENTER
au! BufenTeR
au html
au! html
au augroup BufEnter html
au! augroup BufEnter html
au augroup BufEnter
au! augroup BufEnter
au augroup html
au! augroup html

--------------------------------------------------------------------------------

(script_file
  (autocmd_statement
    (au_event_list
      (au_event))
    (pattern))
  (autocmd_statement
    (bang)
    (au_event_list
      (au_event))
    (pattern))
  (autocmd_statement
    (au_event_list
      (au_event)))
  (autocmd_statement
    (bang)
    (au_event_list
      (au_event)))
  (autocmd_statement
    (augroup_name))
  (autocmd_statement
    (bang)
    (augroup_name))
  (autocmd_statement
    (augroup_name)
    (au_event_list
      (au_event))
    (pattern))
  (autocmd_statement
    (bang)
    (augroup_name)
    (au_event_list
      (au_event))
    (pattern))
  (autocmd_statement
    (augroup_name)
    (au_event_list
      (au_event)))
  (autocmd_statement
    (bang)
    (augroup_name)
    (au_event_list
      (au_event)))
  (autocmd_statement
    (augroup_name)
    (pattern))
  (autocmd_statement
    (bang)
    (augroup_name)
    (pattern)))

================================================================================
Multiple events
================================================================================

au BufNewFile,BufEnter *.html echo "foo"
au! BufNewFile,BufEnter *.html echo "foo"
autocmd BufNewFile,BufEnter *.html echo "foo"
autocmd! BufNewFile,BufEnter *.html echo "foo"

--------------------------------------------------------------------------------

(script_file
  (autocmd_statement
    (au_event_list
      (au_event)
      (au_event))
    (pattern)
    (echo_statement
      (string_literal)))
  (autocmd_statement
    (bang)
    (au_event_list
      (au_event)
      (au_event))
    (pattern)
    (echo_statement
      (string_literal)))
  (autocmd_statement
    (au_event_list
      (au_event)
      (au_event))
    (pattern)
    (echo_statement
      (string_literal)))
  (autocmd_statement
    (bang)
    (au_event_list
      (au_event)
      (au_event))
    (pattern)
    (echo_statement
      (string_literal))))

================================================================================
Multiple patterns
================================================================================

au FileType json,js,html,c,cpp,h,hh setlocal tabstop=4
au! FileType json,js,html,c,cpp,h,hh setlocal tabstop=4
autocmd FileType json,js,html,c,cpp,h,hh setlocal tabstop=4
autocmd! FileType json,js,html,c,cpp,h,hh setlocal tabstop=4

--------------------------------------------------------------------------------

(script_file
  (autocmd_statement
    (au_event_list
      (au_event))
    (pattern)
    (pattern)
    (pattern)
    (pattern)
    (pattern)
    (pattern)
    (pattern)
    (setlocal_statement
      (set_item
        (option_name)
        (set_value))))
  (autocmd_statement
    (bang)
    (au_event_list
      (au_event))
    (pattern)
    (pattern)
    (pattern)
    (pattern)
    (pattern)
    (pattern)
    (pattern)
    (setlocal_statement
      (set_item
        (option_name)
        (set_value))))
  (autocmd_statement
    (au_event_list
      (au_event))
    (pattern)
    (pattern)
    (pattern)
    (pattern)
    (pattern)
    (pattern)
    (pattern)
    (setlocal_statement
      (set_item
        (option_name)
        (set_value))))
  (autocmd_statement
    (bang)
    (au_event_list
      (au_event))
    (pattern)
    (pattern)
    (pattern)
    (pattern)
    (pattern)
    (pattern)
    (pattern)
    (setlocal_statement
      (set_item
        (option_name)
        (set_value)))))

================================================================================
Autocommand term pattern
================================================================================

au BufWinEnter term://* echo "foo"

--------------------------------------------------------------------------------

(script_file
  (autocmd_statement
    (au_event_list
      (au_event))
    (pattern)
    (echo_statement
      (string_literal))))

================================================================================
Autocommand with group
================================================================================

au augroup_name BufWinEnter term://* echo "foo"

--------------------------------------------------------------------------------

(script_file
  (autocmd_statement
    (augroup_name)
    (au_event_list
      (au_event))
    (pattern)
    (echo_statement
      (string_literal))))