我不知道这个“功能”叫什么,所以我也无法用谷歌搜索它,如果标题没有意义,我很抱歉。我最近查看了suckless dwm的源代码并看到了这段代码:(来自dwm.c)
static int (*xerrorxlib)(Display *, XErrorEvent *);
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还有这个:
static void (*handler[LASTEvent]) (XEvent *) = {
[ButtonPress] = buttonpress,
[ClientMessage] = clientmessage,
[ConfigureRequest] = configurerequest,
[ConfigureNotify] = configurenotify,
[DestroyNotify] = destroynotify,
[EnterNotify] = enternotify,
[Expose] = expose,
[FocusIn] = focusin,
[KeyPress] = keypress,
[KeyRelease] = keypress,
[MappingNotify] = mappingnotify,
[MapRequest] = maprequest,
[MotionNotify] = motionnotify,
[PropertyNotify] = propertynotify,
[UnmapNotify] = unmapnotify
};
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这是什么void (*handler[LASTEvent]) (XEvent *)意思 ?它叫什么以及为什么用它?