Question

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What does “void *(*)(void *)” mean in c++?

What does the type void(*)(void *) mean?

I came across this type in the example code for the book “Mastering Algorithms with C”

void list_init(List *list, void (*destroy)(void *data)) 
{
...

...
}

Answer 1

It’s a function pointer.

void (*destroy)(void *data)

destroy is a pointer to a function which returns void and takes a void* as an argument.

cdecl.org is a useful tool for discerning complex C declarations. Also, take a look at the spiral rule.