key_defined - test whether a curses function key code is defined

       Thomas Dickey

       The  key_definedncurses  extension  permits a curses application to determine the function key code, if
       any, to which the string definition is bound.

define_key is an ncurses extension.

key_defined - test whether a curses function key code is defined

       Applications  employing  ncurses  extensions  should  condition  their  use  on  the  visibility  of  the
       NCURSES_VERSION preprocessor macro.

key_defined returns the first key code to which definition is bound if any  exists.   If  none  does,  it
       returns 0.  If definition is a prefix of another binding, key_defined returns -1.

ncurses(3NCURSES), define_key(3NCURSES), keybound(3NCURSES), keyok(3NCURSES)

ncurses 6.5                                        2024-06-08                              key_defined(3NCURSES)

#include<curses.h>intkey_defined(constchar*definition);