Associativity of function call operator in C

Here is an example, where left-right associativity of function call operator matters:

#include <stdio.h>

void foo(void)
{
    puts("foo");
}

void (*bar(void))(void) // bar is a function that returns a pointer to a function
{
    puts("bar");
    return foo;
}

int main(void)
{
    bar()();

    return 0;
}

The function call:

bar()();

is equivalent to:

(bar())();