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# Error code E0323

An associated const was implemented when another trait item was expected.

Erroneous code example:

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

    struct Bar;

    impl Foo for Bar {
        const N : u32 = 0;
        // error: item `N` is an associated const, which doesn't match its
        //        trait `<Bar as Foo>`
    }
    }

Please verify that the associated const wasn't misspelled and the correct trait was implemented. Example:

    #![allow(unused)]
    fn main() {
    struct Bar;

    trait Foo {
        type N;
    }

    impl Foo for Bar {
        type N = u32; // ok!
    }
    }

Or:

    #![allow(unused)]
    fn main() {
    struct Bar;

    trait Foo {
        const N : u32;
    }

    impl Foo for Bar {
        const N : u32 = 0; // ok!
    }
    }