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'.