key_defined(3x)                  Library calls                 key_defined(3x)
       key_defined - test whether a curses function key code is defined
       #include <curses.h>
       int key_defined(const char * definition);
       The  key_defined  ncurses  extension  permits  a  curses application to
       determine the function key code, if any, to which the string definition
       is bound.
       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.
       define_key is an ncurses extension.
       Applications employing ncurses extensions should condition their use on
       the visibility of the NCURSES_VERSION preprocessor macro.
       Thomas Dickey
       curses(3x), define_key(3x), keybound(3x), keyok(3x)
ncurses 6.5                       2024-06-08                   key_defined(3x)