Thread: static array of function pointers.

I basically have some code that lets users register callbacks into a callback table at a specified index. There is one element in this table for each event that can trigger a callback. I basically do something like this:

In a header file

Code:

typedef struct _GMclient
{
    GMcommunicator gcomm;
    GMclient_callback callback_table[(int)MAX_CALLBACKS];
}GMclient;

typedef int (*GMclient_callback)(GMclient*, void*, void*);

Then I allow them to set the callback with a function that basically ends up doing this (in a .c file that includes the previous mentioned .h file):

Code:

void
GMclient_register_callback(GMclient *client,
			   GMclient_callback fxn,
			   int index)
{
    assert (client);
    assert (index < MAX_CALLBACKS);
    client->callback_table[index] = fxn;
    return;
}

Then later when I need to invoke that callback, I pull it out of the table

Code:

	    GMclient_callback *fxn = client->callback_table[CMD_INDEX];

However, I get compilation errors:

Code:

src/gmanager_client.c:43:6: error: a label can only be part of a statement and a declaration is not a statement

Any advice on what I'm doing wrong?