# Error code E0618

Attempted to call something which isn't a function nor a method.

Erroneous code examples:

    #![allow(unused)]
    fn main() {
    enum X {
        Entry,
    }

    X::Entry(); // error: expected function, tuple struct or tuple variant,
                // found `X::Entry`

    // Or even simpler:
    let x = 0i32;
    x(); // error: expected function, tuple struct or tuple variant, found `i32`
    }

Only functions and methods can be called using `()`. Example:

    #![allow(unused)]
    fn main() {
    // We declare a function:
    fn i_am_a_function() {}

    // And we call it:
    i_am_a_function();
    }