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(); }