Extension for GNU Readline Library

Example:

  require "readline"
  include Readline

  line = readline("Prompt> ", true)

[Readline]

<module function>

readline(prompt, add_history=nil)

  Reads one line with line editing.  The inputted line is added to the
  history if add_history is true.

<class methods>

completion_proc = proc

  Specifies a Proc object to determine completion behavior.  It
  should take input-string, and return an array of completion
  candidates.

completion_proc

  Returns the completion Proc object.

completion_case_fold = bool

  Sets whether or not to ignore case on completion.

completion_case_fold

  Returns true if completion ignores case.

completion_append_character = char

  Specifies a character to be appended on completion.
  Nothing will be appended if an empty string ("") or nil is
  specified.

completion_append_character

  Returns a string containing a character to be appended on
  completion.  The default is a space (" ").

vi_editing_mode

  Specifies VI editing mode.

emacs_editing_mode

  Specifies Emacs editing mode.

<class constants>

HISTORY

The history buffer.  It behaves just like an array.
