how to use a pointer to function?

[subjugater]

I'm trying to understand my colleagues' codes in which a function fn is defined in the following way:

fn() {
...
return creator(instanceId, attributes, SafeMath);
}

Here creator is a pointer to another function. Can we directly use this pointer in the above way? Actually, I expect something like the code snippet below, that is, the pointer creator is de-referenced at first before its call to the function which it points to:

fn() {
...
return (*creator)(instanceId, attributes, SafeMath);
}

[Cubbi]

If creator is a pointer to function, then the expression creator(instanceId, attributes, SafeMath) is a function call expression. No need to dereference.

§5.2.2[expr.call]/1

A function call is a postfix expression followed by parentheses [...] the postfix expression shall be either an lvalue that refers to a function [...] or it shall have pointer to function type

[subjugater]

Cubbi, thank you!