Defined in 4 files as a function:
- contrib/ncurses/form/fty_alnum.c, line 160 (as a function)
- contrib/ncurses/form/fty_alpha.c, line 160 (as a function)
- contrib/ncurses/form/fty_int.c, line 163 (as a function)
- contrib/ncurses/form/fty_num.c, line 181 (as a function)