gawk: Readline Support

 
 14.4 Readline Support
 =====================
 
 If 'gawk' is compiled with the GNU Readline library
 (http://cnswww.cns.cwru.edu/php/chet/readline/readline.html), you can
 take advantage of that library's command completion and history
 expansion features.  The following types of completion are available:
 
 Command completion
      Command names.
 
 Source file name completion
      Source file names.  Relevant commands are 'break', 'clear', 'list',
      'tbreak', and 'until'.
 
 Argument completion
      Non-numeric arguments to a command.  Relevant commands are 'enable'
      and 'info'.
 
 Variable name completion
      Global variable names, and function arguments in the current
      context if the program is running.  Relevant commands are
      'display', 'print', 'set', and 'watch'.