E0407 - Error codes index
Description: Book listing all Rust error codes

# Error code E0407

A definition of a method not in the implemented trait was given in a trait implementation.

Erroneous code example:

    #![allow(unused)]
    fn main() {
    trait Foo {
        fn a();
    }

    struct Bar;

    impl Foo for Bar {
        fn a() {}
        fn b() {} // error: method `b` is not a member of trait `Foo`
    }
    }

Please verify you didn't misspell the method name and you used the correct trait. First example:

    #![allow(unused)]
    fn main() {
    trait Foo {
        fn a();
        fn b();
    }

    struct Bar;

    impl Foo for Bar {
        fn a() {}
        fn b() {} // ok!
    }
    }

Second example:

    #![allow(unused)]
    fn main() {
    trait Foo {
        fn a();
    }

    struct Bar;

    impl Foo for Bar {
        fn a() {}
    }

    impl Bar {
        fn b() {}
    }
    }