patch 8.2.0512: Vim9: no optional arguments in func type Commit: https://github.com/vim/vim/commit/5deeb3f1f9db4eabd36e99cbf857fe376eb37e10 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Apr 5 17:08:17 2020 +0200 patch 8.2.0512: Vim9: no optional arguments in func type Problem: Vim9: no optional arguments in func type. Solution: Check for question mark after type. Find function reference without function().

/* sound.c */
int has_any_sound_callback(void);
int has_sound_callback_in_queue(void);
void invoke_sound_callback(void);
void f_sound_playevent(typval_T *argvars, typval_T *rettv);
void f_sound_playfile(typval_T *argvars, typval_T *rettv);
void f_sound_stop(typval_T *argvars, typval_T *rettv);
void f_sound_clear(typval_T *argvars, typval_T *rettv);
void sound_free(void);
/* vim: set ft=c : */