Update documentation

By default, unmatched trailing token from each line is also aligned in
right and center alignment modes unlike in left alignment mode. If
ignore_unmatched option is explicitly set to 1 by user, they will be ignored
even in right/center modes.

DEMO.md

@@ -0,0 +1,91 @@
+# vim: set buftype=nofile colorcolumn= scrolloff=0 noshowcmd:
+
+vim-easy-align
+==============
+
+Where's Lennon?
+---------------
+
+Paul McCartney 1942
+George Harrison 1943
+Ringo Starr 1940
+Pete Best 1941
+
+
+Formatting table
+----------------
+```
+
+| Option| Type | Default | Description |
+|--|--|--|--|
+| threads | Fixnum | 1 | number of threads in the thread pool |
+|queues |Fixnum | 1 | number of concurrent queues |
+|queue_size | Fixnum | 1000 | size of each queue |
+|   interval | Numeric | 0 | dispatcher interval for processing |
+|batch | Boolean | false | enables batch processing mode |
+ |batch_size | Fixnum | nil | maximum number of items in batch|
+ |logger | Logger | nil | logger instance for debug logs |
+
+```
+Operators with = sign
+---------------------
+```ruby
+
+a =
+a = 1
+bbbb = 2
+ccccccc = 3
+ccccccccccccccc
+ddd = 4
+eeee === eee = eee = eee=f
+fff = ggg += gg &&= gg
+g != hhhhhhhh == 888
+i   := 5
+i     %= 5
+i       *= 5
+j     =~ 5
+j   >= 5
+aa      =>         123
+aa <<= 123
+aa        >>= 123
+bbb               => 123
+c     => 1233123
+d   =>      123
+dddddd &&= 123
+dddddd ||= 123
+dddddd /= 123
+gg <=> ee
+
+```
+Formatting YAML (or JSON)
+-------------------------
+```yaml
+
+mysql:
+  # JDBC driver for MySQL database:
+  driver: com.mysql.jdbc.Driver
+  # JDBC URL for the connection (jdbc:mysql://HOSTNAME/DATABASE)
+  url: jdbc:mysql://localhost/test
+  database: test
+  "user:pass":r00t:pa55
+
+```
+Using blockwise-visual mode or negative N-th parameter
+------------------------------------------------------
+```ruby
+
+options = { :caching => nil,
+            :versions => 3,
+            "cache=blocks" => false }.merge(options)
+
+```
+Commas
+------
+
+aaa,   bb,c
+d,eeeeeee
+fffff, gggggggggg,
+h, ,           ii
+j,,k
+
+

EXAMPLES.md

@@ -166,8 +166,8 @@ my_object
 ```
 
 
-Using blockwise-visual mode or negative field index
----------------------------------------------------
+Using blockwise-visual mode or negative N-th parameter
+------------------------------------------------------
 
 You can try either:
 - select text around `=>` in blockwise-visual mode (`CTRL-V`) and `<Enter>=`

README.md

@@ -37,15 +37,17 @@ and extract in ~/.vim or
 [plugin](https://github.com/Shougo/neobundle.vim)
 [manager](https://github.com/MarcWeber/vim-addon-manager).
 
-### With Vundle
-
-Add the following line to your .vimrc,
-
-```vim
-Bundle 'junegunn/vim-easy-align'
-```
-
-then execute `:BundleInstall` command.
+- [Pathogen](https://github.com/tpope/vim-pathogen)
+  - `git clone https://github.com/junegunn/vim-easy-align.git ~/.vim/bundle/vim-easy-align`
+- [Vundle](https://github.com/gmarik/vundle)
+  1. Add `Bundle 'junegunn/vim-easy-align'` to .vimrc
+  2. Run `:BundleInstall`
+- [NeoBundle](https://github.com/Shougo/neobundle.vim)
+  1. Add `NeoBundle 'junegunn/vim-easy-align'` to .vimrc
+  2. Run `:NeoBundleInstall`
+- [vim-plug](https://github.com/junegunn/vim-plug)
+  1. Add `Plug 'junegunn/vim-easy-align'` to .vimrc
+  2. Run `:PlugInstall`
 
 Usage
 -----
@@ -56,8 +58,8 @@ variant `:EasyAlign!`) for visual mode.
 | Mode                      | Command                                          |
 | ------------------------- | ------------------------------------------------ |
 | Interactive mode          | `:EasyAlign[!] [OPTIONS]`                        |
-| Using predefined rules    | `:EasyAlign[!] [FIELD#] DELIMITER_KEY [OPTIONS]` |
-| Using regular expressions | `:EasyAlign[!] [FIELD#] /REGEXP/ [OPTIONS]`      |
+| Using predefined rules    | `:EasyAlign[!] [N-th] DELIMITER_KEY [OPTIONS]`   |
+| Using regular expressions | `:EasyAlign[!] [N-th] /REGEXP/ [OPTIONS]`        |
 
 ### Concept of _alignment rule_
 
@@ -75,7 +77,7 @@ For convenience, it is advised that you define a mapping for triggering it in
 your `.vimrc`.
 
 ```vim
-vnoremap <silent> <Enter> :EasyAlign<cr>
+vnoremap <silent> <Enter> :EasyAlign<Enter>
 ```
 
 (Of course you can use any key combination as the trigger. e.g. `<Leader>a`)
@@ -83,8 +85,8 @@ vnoremap <silent> <Enter> :EasyAlign<cr>
 With the mapping, you can align selected lines of text with only a few keystrokes.
 
 1. `<Enter>` key to start interactive EasyAlign command
-1. Optional Enter keys to select alignment mode (left, right, or center)
-1. Optional field number (default: 1)
+1. Optional: Enter keys to select alignment mode (left, right, or center)
+1. Optional: N-th delimiter (default: 1)
     - `1`         Around the 1st occurrences of delimiters
     - `2`         Around the 2nd occurrences of delimiters
     - ...
@@ -156,6 +158,14 @@ keys listed below. The meaning of each option will be described in
 | `CTRL-O`  | `mode_sequence`    | Input string of `/[lrc]+\*{0,2}/`                  |
 | `<Left>`  | `stick_to_left`    | `{ 'stick_to_left': 1, 'left_margin': 0 }`         |
 | `<Right>` | `stick_to_left`    | `{ 'stick_to_left': 0, 'left_margin': 1 }`         |
+| `<Down>`  | `*_margin`         | `{ 'left_margin': 0, 'right_margin': 0 }`          |
+
+After a successful alignment, you can repeat the same operation using the
+repeatable, non-interactive command recorded in `g:easy_align_last_command`.
+
+```vim
+:<C-R>=g:easy_align_last_command<Enter><Enter>
+```
 
 ---
 
@@ -169,17 +179,17 @@ Go try out vim-easy-align right now, and come back later when you feel like it.
 
 ---
 
-### Non-interactive mode
+### Non-interactive mode (command line)
 
 Instead of going into the interactive mode, you can type in arguments to
 `:EasyAlign` command.
 
 ```vim
 " Using predefined alignment rules
-:EasyAlign[!] [FIELD#] DELIMITER_KEY [OPTIONS]
+:EasyAlign[!] [N-th] DELIMITER_KEY [OPTIONS]
 
 " Using arbitrary regular expressions
-:EasyAlign[!] [FIELD#] /REGEXP/ [OPTIONS]
+:EasyAlign[!] [N-th] /REGEXP/ [OPTIONS]
 ```
 
 For example, when aligning the following lines around colons and semi-colons,
@@ -213,8 +223,26 @@ You can even omit spaces between the arguments, so concisely (or cryptically):
 
 - `:EasyAlign*/[:;]\+/{'s':1,'l':0}`
 
-The same thing can be done in the interactive mode as well with the following
-key combination.
+Nice. But let's make it even shorter. When you use write regular expression in
+command line, option values can be written in shorthand notation.
+
+- `:EasyAlign*/[:;]\+/s1l0`
+
+The following table summarizes the shorthand notation.
+
+| Option           | Expression |
+| ---------------- | ---------- |
+| left_margin      | `l[0-9]+`  |
+| right_margin     | `r[0-9]+`  |
+| stick_to_left    | `s[01]`    |
+| ignore_unmatched | `iu[01]`   |
+| ignore_groups    | `ig\[.*\]` |
+| delimiter_align  | `d[lrc]`   |
+| mode_sequence    | `m[lrc*]*` |
+| indentation      | `i[ksdn]`  |
+
+For your information, the same thing can be done in the interactive mode as well
+with the following key combination.
 
 - `<Enter>`
 - `*`
@@ -247,7 +275,7 @@ my_hash = { :a   => 1,
 ```
 
 However, in this case, we don't really need blockwise visual mode
-since the same can be easily done using the negative field number: `<Enter>-=`
+since the same can be easily done using the negative N-th parameter: `<Enter>-=`
 
 Alignment options
 -----------------
@@ -271,19 +299,19 @@ There are 4 ways to set alignment options (from lowest precedence to highest):
 
 1. Some option values can be set with corresponding global variables
 2. Option values can be specified in the definition of each alignment rule
-3. Option values can be given as a dictionary argument to `:EasyAlign` command
+3. Option values can be given as arguments to `:EasyAlign` command
 4. Option values can be set in interactive mode using special shortcut keys
 
-| Option             | Shortcut key        | Global variable                 |
-| ------------------ | ------------------- | ------------------------------- |
-| `left_margin`      | `CTRL-L`            |                                 |
-| `right_margin`     | `CTRL-R`            |                                 |
-| `stick_to_left`    | `<Left>`, `<Right>` |                                 |
-| `ignore_groups`    | `CTRL-G`            | `g:easy_align_ignore_groups`    |
-| `ignore_unmatched` | `CTRL-U`            | `g:easy_align_ignore_unmatched` |
-| `indentation`      | `CTRL-I`            | `g:easy_align_indentation`      |
-| `delimiter_align`  | `CTRL-D`            | `g:easy_align_delimiter_align`  |
-| `mode_sequence`    | `CTRL-O`            |                                 |
+| Option name        | Shortcut key        | Abbreviated | Global variable                 |
+| ------------------ | ------------------- | ----------- | ------------------------------- |
+| `left_margin`      | `CTRL-L`            | `l[0-9]+`   |                                 |
+| `right_margin`     | `CTRL-R`            | `r[0-9]+`   |                                 |
+| `stick_to_left`    | `<Left>`, `<Right>` | `s[01]`     |                                 |
+| `ignore_groups`    | `CTRL-G`            | `ig\[.*\]`  | `g:easy_align_ignore_groups`    |
+| `ignore_unmatched` | `CTRL-U`            | `iu[01]`    | `g:easy_align_ignore_unmatched` |
+| `indentation`      | `CTRL-I`            | `i[ksdn]`   | `g:easy_align_indentation`      |
+| `delimiter_align`  | `CTRL-D`            | `d[lrc]`    | `g:easy_align_delimiter_align`  |
+| `mode_sequence`    | `CTRL-O`            | `m[lrc*]*`  |                                 |
 
 ### Ignoring delimiters in comments or strings
 
@@ -508,7 +536,7 @@ let g:easy_align_bang_interactive_modes = ['c', 'r']
 
 ### Alignments over multiple occurrences of delimiters
 
-As stated above, "field number" is used to target specific occurrences of
+As stated above, "N-th" parameter is used to target specific occurrences of
 the delimiter when it appears multiple times in each line.
 
 To recap:

autoload/easy_align.vim

@@ -49,10 +49,10 @@ let s:known_options = {
 \ }
 
 let s:option_values = {
-\ 'indentation':      ['shallow', 'deep', 'none', 'keep'],
-\ 'delimiter_align':  ['left', 'center', 'right'],
-\ 'ignore_unmatched': [0, 1],
-\ 'ignore_groups':    [[], ['String'], ['Comment'], ['String', 'Comment']]
+\ 'indentation':      ['shallow', 'deep', 'none', 'keep', -1],
+\ 'delimiter_align':  ['left', 'center', 'right', -1],
+\ 'ignore_unmatched': [0, 1, -1],
+\ 'ignore_groups':    [[], ['String'], ['Comment'], ['String', 'Comment'], -1]
 \ }
 
 let s:shorthand = {
@@ -95,7 +95,6 @@ function! s:ignored_syntax()
   endif
 endfunction
 
-let s:prev_echon_len = 0
 function! s:echon_(tokens)
   " http://vim.wikia.com/wiki/How_to_print_full_screen_width_messages
   let xy = [&ruler, &showcmd]
@@ -104,11 +103,6 @@ function! s:echon_(tokens)
 
     let winlen = winwidth(winnr()) - 2
     let len = len(join(map(copy(a:tokens), 'v:val[1]'), ''))
-    if len < s:prev_echon_len
-      echohl None
-      echon "\r". repeat(' ', min([winlen, s:prev_echon_len]))
-    endif
-    let s:prev_echon_len = len
     let ellipsis = len > winlen ? '..' : ''
 
     echon "\r"
@@ -130,7 +124,7 @@ function! s:echon_(tokens)
   endtry
 endfunction
 
-function! s:echon(l, n, r, d, o)
+function! s:echon(l, n, r, d, o, warn)
   let tokens = [
   \ ['Function', ':EasyAlign'],
   \ ['ModeMsg', get(s:mode_labels, a:l, a:l)],
@@ -141,10 +135,14 @@ function! s:echon(l, n, r, d, o)
   call extend(tokens, a:r == 1 ?
   \ [['Delimiter', '/'], ['String', a:d], ['Delimiter', '/']] :
   \ [['Identifier', a:d == ' ' ? '\ ' : (a:d == '\' ? '\\' : a:d)]])
-  if a:r == -1 | call add(tokens, ['Comment', ')']) | endif
+  if a:r == -1 | call extend(tokens, [['Normal', '_'], ['Comment', ')']]) | endif
   call add(tokens, ['Statement', empty(a:o) ? '' : ' '.string(a:o)])
+  if !empty(a:warn)
+    call add(tokens, ['WarningMsg', ' ('.a:warn.')'])
+  endif
 
   call s:echon_(tokens)
+  return join(map(tokens, 'v:val[1]'), '')
 endfunction
 
 function! s:exit(msg)
@@ -314,7 +312,10 @@ function! s:split_line(line, nth, modes, cycle, fc, lc, pattern, stick_to_left,
     let delims = []
   " Append an empty item to enable right/center alignment of the last token
   " - if the last token is not ignorable or ignorable but not the only token
-  elseif (mode ==? 'r' || mode ==? 'c') && (!ignorable || len(tokens) > 1) && a:nth >= 0 " includes -0
+  elseif a:ignore_unmatched != 1          &&
+        \ (mode ==? 'r' || mode ==? 'c')  &&
+        \ (!ignorable || len(tokens) > 1) &&
+        \ a:nth >= 0 " includes -0
     call add(tokens, '')
     call add(delims, '')
   endif
@@ -363,12 +364,12 @@ function! s:do_align(modes, all_tokens, all_delims, fl, ll, fc, lc, pattern, nth
     " Calculate the maximum number of tokens for a line within the range
     call s:max(max, { 'tokens': len(tokens) })
 
-    if a:nth > 0 " Positive field number
+    if a:nth > 0 " Positive N-th
       if len(tokens) < a:nth
         continue
       endif
       let nth = a:nth - 1 " make it 0-based
-    else " -0 or Negative field number
+    else " -0 or Negative N-th
       if a:nth == 0 && mode !=? 'l'
         let nth = len(tokens) - 1
       else
@@ -560,16 +561,28 @@ function! s:atoi(str)
   return (a:str =~ '^[0-9]\+$') ? str2nr(a:str) : a:str
 endfunction
 
-function! s:interactive(modes, vis, opts)
+function! s:shift_opts(opts, key, vals)
+  let val = s:shift(a:vals, 1)
+  if type(val) == 0 && val == -1
+    call remove(a:opts, a:key)
+  else
+    let a:opts[a:key] = val
+  endif
+endfunction
+
+function! s:interactive(modes, vis, opts, delims)
   let mode = s:shift(a:modes, 1)
   let n    = ''
   let ch   = ''
   let opts = s:compact_options(a:opts)
   let vals = deepcopy(s:option_values)
   let regx = 0
+  let warn = ''
 
   while 1
-    call s:echon(mode, n, -1, '', opts)
+    call s:echon(mode, n, -1, '', opts, warn)
+    let check = 0
+    let warn = ''
 
     let c  = getchar()
     let ch = nr2char(c)
@@ -587,39 +600,55 @@ function! s:interactive(modes, vis, opts)
     elseif ch == '-'
       if empty(n)      | let n = '-'
       elseif n == '-'  | let n = ''
-      else             | break
+      else             | let check = 1
       endif
     elseif ch == '*'
       if empty(n)      | let n = '*'
       elseif n == '*'  | let n = '**'
       elseif n == '**' | let n = ''
-      else             | break
+      else             | let check = 1
       endif
-    elseif c >= 48 && c <= 57 " Numbers
-      if n[0] == '*'   | break
+    elseif (c == 48 && len(n) > 0) || c > 48 && c <= 57 " Numbers
+      if n[0] == '*'   | let check = 1
       else             | let n = n . ch
       end
     elseif ch == "\<C-D>"
-      let opts['da'] = s:shift(vals['delimiter_align'], 1)
+      call s:shift_opts(opts, 'da', vals['delimiter_align'])
     elseif ch == "\<C-I>"
-      let opts['idt'] = s:shift(vals['indentation'], 1)
+      call s:shift_opts(opts, 'idt', vals['indentation'])
     elseif ch == "\<C-L>"
-      let opts['lm'] = s:atoi(s:input("Left margin: ", get(opts, 'lm', ''), a:vis))
+      let lm = s:input("Left margin: ", get(opts, 'lm', ''), a:vis)
+      if empty(lm)
+        let warn = 'Set to default. Input 0 to remove it'
+        silent! call remove(opts, 'lm')
+      else
+        let opts['lm'] = s:atoi(lm)
+      endif
     elseif ch == "\<C-R>"
-      let opts['rm'] = s:atoi(s:input("Right margin: ", get(opts, 'rm', ''), a:vis))
+      let rm = s:input("Right margin: ", get(opts, 'rm', ''), a:vis)
+      if empty(rm)
+        let warn = 'Set to default. Input 0 to remove it'
+        silent! call remove(opts, 'rm')
+      else
+        let opts['rm'] = s:atoi(rm)
+      endif
     elseif ch == "\<C-U>"
-      let opts['iu'] = s:shift(vals['ignore_unmatched'], 1)
+      call s:shift_opts(opts, 'iu', vals['ignore_unmatched'])
     elseif ch == "\<C-G>"
-      let opts['ig'] = s:shift(vals['ignore_groups'], 1)
+      call s:shift_opts(opts, 'ig', vals['ignore_groups'])
     elseif c == "\<Left>"
       let opts['stl'] = 1
       let opts['lm']  = 0
     elseif c == "\<Right>"
       let opts['stl'] = 0
       let opts['lm']  = 1
-    elseif c == "\<Up>" || c == "\<Down>"
+    elseif c == "\<Down>"
+      let opts['lm']  = 0
+      let opts['rm']  = 0
+    elseif c == "\<Up>"
       silent! call remove(opts, 'stl')
       silent! call remove(opts, 'lm')
+      silent! call remove(opts, 'rm')
     elseif ch == "\<C-O>"
       let modes = tolower(s:input("Mode sequence: ", get(opts, 'm', mode), a:vis))
       if match(modes, '^[lrc]\+\*\{0,2}$') != -1
@@ -633,22 +662,88 @@ function! s:interactive(modes, vis, opts)
     elseif ch == "\<C-_>" || ch == "\<C-X>"
       let prompt = 'Regular expression: '
       let ch = s:input(prompt, '', a:vis)
-      if !empty(ch)
+      if !empty(ch) && s:valid_regexp(ch)
         let regx = 1
-        let s:prev_echon_len = len(prompt . ch)
         break
+      else
+        let warn = 'Invalid regular expression: '.ch
       endif
+    elseif ch =~ '[[:print:]]'
+      let check = 1
     else
-      break
+      let warn = 'Invalid character'
+    endif
+
+    if check
+      if has_key(a:delims, ch)
+        break
+      else
+        let warn = 'Unknown delimiter key: '.ch
+      endif
     endif
   endwhile
   return [mode, n, ch, s:normalize_options(opts), regx]
 endfunction
 
-function! s:test_regexp(regexp)
-  try   | call matchlist('', a:regexp)
-  catch | call s:exit("Invalid regular expression: ". a:regexp)
+function! s:valid_regexp(regexp)
+  try
+    call matchlist('', a:regexp)
+  catch
+    return 0
   endtry
+  return 1
+endfunction
+
+function! s:test_regexp(regexp)
+  if !s:valid_regexp(a:regexp)
+    call s:exit('Invalid regular expression: '. a:regexp)
+  endif
+  return a:regexp
+endfunction
+
+function! s:parse_shortcut_opts(expr)
+  let opts = {}
+  let expr = substitute(a:expr, '\s', '', 'g')
+  let regex =
+    \ '^\('
+    \   .'\(l[0-9]\+\)\|\(r[0-9]\+\)\|\(iu[01]\)\|\(s[01]\)\|'
+    \   .'\(d[clr]\)\|\(m[lrc*]\+\)\|\(i[kdsn]\)\|\(ig\[.*\]\)'
+    \ .'\)\+$'
+
+  if empty(expr)
+    return opts
+  elseif expr !~ regex
+    call s:exit("Invalid expression: ". a:expr)
+  else
+    let match = matchlist(expr, regex)
+    if empty(match) | break | endif
+    for m in filter(match[ 2 : -1 ], '!empty(v:val)')
+      let k  = tolower(m[0])
+      let kk = tolower(m[0 : 1])
+      let rest = m[1 : -1]
+      if index(['l', 'r', 's'], k) >= 0
+        let opts[k] = str2nr(rest)
+      elseif kk == 'iu'
+        let opts['iu'] = str2nr(m[2 : -1])
+      elseif kk == 'ig'
+        try
+          let arr = eval(m[2 : -1])
+          if type(arr) == 3
+            let opts['ig'] = arr
+          else
+            throw 'Not an array'
+          endif
+        catch
+          call s:exit("Invalid ignore_groups: ". a:expr)
+        endtry
+      elseif k == 'i'
+        let opts['idt'] = rest
+      else
+        let opts[k] = rest
+      endif
+    endfor
+  endif
+  return s:normalize_options(opts)
 endfunction
 
 function! s:parse_args(args)
@@ -691,11 +786,14 @@ function! s:parse_args(args)
   endif
 
   " Has /Regexp/?
-  let matches = matchlist(args, '^\(.\{-}\)\s*/\(.*\)/\s*$')
+  let matches = matchlist(args, '^\(.\{-}\)\s*/\(.*\)/\(.\{-}\)$')
 
   " Found regexp
   if !empty(matches)
-    return [matches[1], matches[2], opts, 1]
+    if !empty(matches[3])
+      let opts = extend(s:parse_shortcut_opts(matches[3]), opts)
+    endif
+    return [matches[1], s:test_regexp(matches[2]), opts, 1]
   else
     let tokens = matchlist(args, '^\([1-9][0-9]*\|-[0-9]*\|\*\*\?\)\?\s*\(.\{-}\)\?$')
     return [tokens[1], tokens[2], opts, 0]
@@ -730,12 +828,17 @@ function! s:align(bang, first_line, last_line, expr)
   " Heuristically determine if the user was in visual mode
   let vis    = a:first_line == line("'<") && a:last_line == line("'>")
 
+  let delimiters = s:easy_align_delimiters_default
+  if exists('g:easy_align_delimiters')
+    let delimiters = extend(copy(delimiters), g:easy_align_delimiters)
+  endif
+
   if empty(a:expr)
-    let [mode, n, ch, opts, regexp] = s:interactive(copy(modes), vis, opts)
+    let [mode, n, ch, opts, regexp] = s:interactive(copy(modes), vis, opts, delimiters)
   else
     let [n, ch, opts, regexp] = s:parse_args(a:expr)
     if empty(n) && empty(ch)
-      let [mode, n, ch, opts, regexp] = s:interactive(copy(modes), vis, opts)
+      let [mode, n, ch, opts, regexp] = s:interactive(copy(modes), vis, opts, delimiters)
     elseif empty(ch)
       " Try swapping n and ch
       let [n, ch] = ['', n]
@@ -747,18 +850,12 @@ function! s:align(bang, first_line, last_line, expr)
   elseif n == '-'  | let nth = -1
   elseif empty(n)  | let nth = 1
   elseif n == '0' || ( n != '-0' && n != string(str2nr(n)) )
-    call s:exit('Invalid field number: '. n)
+    call s:exit('Invalid N-th parameter: '. n)
   else
     let nth = n
   endif
 
-  let delimiters = s:easy_align_delimiters_default
-  if exists('g:easy_align_delimiters')
-    let delimiters = extend(copy(delimiters), g:easy_align_delimiters)
-  endif
-
   if regexp
-    call s:test_regexp(ch)
     let dict = { 'pattern': ch }
   else
     " Resolving command-line ambiguity
@@ -816,7 +913,7 @@ function! s:align(bang, first_line, last_line, expr)
     \ get(dict, 'delimiter_align', get(g:, 'easy_align_delimiter_align', 'r'))[0],
     \ get(dict, 'indentation', get(g:, 'easy_align_indentation', 'k'))[0],
     \ get(dict, 'stick_to_left', 0),
-    \ get(dict, 'ignore_unmatched', get(g:, 'easy_align_ignore_unmatched', 1)),
+    \ get(dict, 'ignore_unmatched', get(g:, 'easy_align_ignore_unmatched', 2)),
     \ get(dict, 'ignore_groups', get(dict, 'ignores', s:ignored_syntax())),
     \ recur)
 
@@ -828,6 +925,6 @@ function! s:align(bang, first_line, last_line, expr)
     \ )
     call extend(copts, { 'm': aseq_str })
   endif
-  call s:echon('', n, regexp, ch, copts)
+  let g:easy_align_last_command = s:echon('', n, regexp, ch, copts, '')
 endfunction
 

doc/easy_align.txt

@@ -16,11 +16,11 @@ EasyAlign                                      *:EasyAlign* *:EasyAlign!*
 vim-easy-align defines `:EasyAlign` command in the visual mode.
 (:EasyAlign! is the right-align version.)
 
-| Mode                      | Command                                        |
-| ------------------------- | ---------------------------------------------- |
-| Interactive mode          | :EasyAlign[!] [OPTIONS]                        |
-| Using predefined rules    | :EasyAlign[!] [FIELD#] DELIMITER_KEY [OPTIONS] |
-| Using regular expressions | :EasyAlign[!] [FIELD#] /REGEXP/ [OPTIONS]      |
+| Mode                      | Command                                      |
+| ------------------------- | -------------------------------------------- |
+| Interactive mode          | :EasyAlign[!] [OPTIONS]                      |
+| Using predefined rules    | :EasyAlign[!] [N-th] DELIMITER_KEY [OPTIONS] |
+| Using regular expressions | :EasyAlign[!] [N-th] /REGEXP/ [OPTIONS]      |
 
 
 Interactive mode
@@ -30,13 +30,13 @@ The command will go into the interactive mode when no argument is given.
 For convenience, it is advised that you define a mapping for triggering it in
 your `.vimrc`.
 
-    vnoremap <silent> <Enter> :EasyAlign<cr>
+    vnoremap <silent> <Enter> :EasyAlign<Enter>
 
 With this mapping, you can align selected lines of text with a few keystrokes.
 
 1. <Enter> key to start interactive EasyAlign command
-2. Optional Enter keys to select alignment mode (left, right, or center)
-3. Optional field number (default: 1)
+2. Optional: Enter keys to select alignment mode (left, right, or center)
+3. Optional: N-th delimiter (default: 1)
     1        Around the 1st occurrences of delimiters
     2        Around the 2nd occurrences of delimiters
     *        Around all occurrences of delimiters
@@ -97,19 +97,27 @@ described in the following sections.
 | CTRL-O  | mode_sequence    | Input string of /[lrc]+\*{0,2}/              |
 | <Left>  | stick_to_left    | { 'stick_to_left': 1, 'left_margin': 0 }     |
 | <Right> | stick_to_left    | { 'stick_to_left': 0, 'left_margin': 1 }     |
+| <Down>  | *_margin         | { 'left_margin': 0, 'right_margin': 0 }      |
+
+                                              *g:easy_align_last_command*
+
+After a successful alignment, you can repeat the same operation using the
+repeatable, non-interactive command recorded in `g:easy_align_last_command`.
+
+    :<C-R>=g:easy_align_last_command<Enter><Enter>
 
 
-Non-interactive mode
+Non-interactive mode (command line)
 -------------------------------------------------------------------------
 
 Instead of going into the interactive mode, you can type in arguments to
 `:EasyAlign` command.
 
     " Using predefined alignment rules
-    :EasyAlign[!] [FIELD#] DELIMITER_KEY [OPTIONS]
+    :EasyAlign[!] [N-th] DELIMITER_KEY [OPTIONS]
 
     " Using arbitrary regular expressions
-    :EasyAlign[!] [FIELD#] /REGEXP/ [OPTIONS]
+    :EasyAlign[!] [N-th] /REGEXP/ [OPTIONS]
 
 For example, when aligning the following lines around colons and semi-colons,
 
@@ -118,16 +126,16 @@ For example, when aligning the following lines around colons and semi-colons,
 
 try these commands:
 
-- :EasyAlign /[:;]\+/
-- :EasyAlign 2/[:;]\+/
-- :EasyAlign */[:;]\+/
-- :EasyAlign **/[:;]\+/
+    :EasyAlign /[:;]\+/
+    :EasyAlign 2/[:;]\+/
+    :EasyAlign */[:;]\+/
+    :EasyAlign **/[:;]\+/
 
 Notice that you can't append '\zs' to your regular expression to put delimiters
 on the left. It can be done by providing additional options in Vim dictionary
 format.
 
-- :EasyAlign * /[:;]\+/ { 'stick_to_left': 1, 'left_margin': 0 }
+    :EasyAlign * /[:;]\+/ { 'stick_to_left': 1, 'left_margin': 0 }
 
 Then we get:
 
@@ -136,20 +144,38 @@ Then we get:
 
 Option names are fuzzy-matched, so you can write as follows:
 
-- :EasyAlign * /[:;]\+/ { 'stl': 1, 'l': '' }
+    :EasyAlign * /[:;]\+/ { 'stl': 1, 'l': '' }
 
 You can even omit spaces between the arguments, so concisely (or cryptically):
 
-- :EasyAlign*/[:;]\+/{'s':1,'l':''}
+    :EasyAlign*/[:;]\+/{'s':1,'l':''}
 
-The same thing can be done in the interactive mode as well with the following
-key combination.
+Nice. But let's make it even shorter. When you use write regular expression in
+command line, option values can be written in shorthand notation.
 
-- <Enter>
-- *
-- <Left>
-- <CTRL-/> (or <CTRL-X> on GVim)
-  - [:;]\+
+    :EasyAlign*/[:;]\+/s1l0
+
+The following table summarizes the shorthand notation.
+
+| Option           | Expression |
+| --------------   | ---------- |
+| left_margin      | l[0-9]+    |
+| right_margin     | r[0-9]+    |
+| stick_to_left    | s[01]      |
+| ignore_unmatched | iu[01]     |
+| ignore_groups    | ig\[.*\]   |
+| delimiter_align  | d[lrc]     |
+| mode_sequence    | m[lrc*]+   |
+| indentation      | i[ksdn]    |
+
+For your information, the same thing can be done in the interactive mode as well
+with the following key combination.
+
+    - <Enter>
+    - *
+    - <Left>
+    - <CTRL-/> (or <CTRL-X> on GVim)
+      - [:;]\+
 
 
 Partial alignment in blockwise-visual mode
@@ -175,26 +201,26 @@ Available options are as follows.
 |                  |                  |   (right, left, center)       |
 | indentation      | string           | 'k'                           |
 |                  |                  |   (keep, shallow, deep, none) |
-| mode_sequence    | string           | (Depends on field number and  |
+| mode_sequence    | string           | (Depends on N-th param and    |
 |                  |                  |  selected alignment mode)     |
 
 There are 4 ways to set alignment options (from lowest precedence to highest):
 
 1. Some option values can be set with corresponding global variables
 2. Option values can be specified in the definition of each alignment rule
-3. Option values can be given as a dictionary argument to :EasyAlign command
+3. Option values can be given as arguments to :EasyAlign command
 4. Option values can be set in interactive mode using special shortcut keys
 
-| Option           | Shortcut key        | Global variable                 |
-| ---------------- | ------------------- | ------------------------------- |
-| left_margin      | CTRL-L              |                                 |
-| right_margin     | CTRL-R              |                                 |
-| stick_to_left    | <Left>, <Right>     |                                 |
-| ignore_groups    | CTRL-G              | `g:easy_align_ignore_groups`      |
-| ignore_unmatched | CTRL-U              | `g:easy_align_ignore_unmatched`   |
-| indentation      | CTRL-I              | `g:easy_align_indentation`        |
-| delimiter_align  | CTRL-D              | `g:easy_align_delimiter_align`    |
-| mode_sequence    | CTRL-O              |                                 |
+| Option           | Shortcut key    | Abbreviated | Global variable               |
+| ---------------- | --------------- | ----------- | ----------------------------- |
+| left_margin      | CTRL-L          | l[0-9]+     |                               |
+| right_margin     | CTRL-R          | r[0-9]+     |                               |
+| stick_to_left    | <Left>, <Right> | s[01]       |                               |
+| ignore_groups    | CTRL-G          | ig\[.*\]    | `g:easy_align_ignore_groups`    |
+| ignore_unmatched | CTRL-U          | iu[01]      | `g:easy_align_ignore_unmatched` |
+| indentation      | CTRL-I          | i[ksdn]     | `g:easy_align_indentation`      |
+| delimiter_align  | CTRL-D          | d[lrc]      | `g:easy_align_delimiter_align`  |
+| mode_sequence    | CTRL-O          | m[lrc*]+    |                               |
 
 
 Ignoring delimiters in comments or strings   *g:easy_align_ignore_groups*
@@ -407,7 +433,7 @@ settings as follows.
 Alignments over multiple occurrences of delimiters
 -------------------------------------------------------------------------
 
-As stated above, "field number" is used to target specific occurrences of
+As stated above, "N-th" parameter is used to target specific occurrences of
 the delimiter when it appears multiple times in each line.
 
 To recap:

test/basic.expected

@@ -1064,3 +1064,12 @@ aaa,   b,
 111 22 333  444 55555 6666  7  88888
 1111 2 33   444  555   66  777   8
 
+  a = 1
+ bb = 2
+ccccc
+ddd = 3
+
+    a = 1
+   bb = 2
+ccccc
+  ddd = 3

test/basic.script

@@ -1 +1 @@
-4Gvipjyvip
+4Gvipjyvip

test/regexp.expected

@@ -94,3 +94,15 @@ banana = 'Gros Michel'   # comment 2
 a()p()p()l()e();():()b()a()n()a()n()a():():()c()a()k()e(
 d()a()t()a();();()e()x()c()h()a()n()g()e():();()f()o()r()m()a()t(
 
+apple  ;: banana   ::  cake
+ data  ;;exchange  :;format
+
+apple ;:  banana  ::   cake
+ data ;; exchange :; format
+
+apple;:banana  ::cake
+data ;;exchange:;format
+
+apple   ;:   banana   ::     cake
+data   ;;    exchange   :;   format
+

test/regexp.script

@@ -1 +1 @@
-4Gvipjyvip:EasyAlign:
+4Gvipjyvip:EasyAlign: