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# Error code E0075

A `#[simd]` attribute was applied to an empty or multi-field struct.

Erroneous code examples:

    #![allow(unused)]
    #![feature(repr_simd)]

    fn main() {
    #[repr(simd)]
    struct Bad; // error!
    }

    #![allow(unused)]
    #![feature(repr_simd)]

    fn main() {
    #[repr(simd)]
    struct Bad([u32; 1], [u32; 1]); // error!
    }

The `#[simd]` attribute can only be applied to a single-field struct, because the one field must be the array of values in the vector.

Fixed example:

    #![allow(unused)]
    #![feature(repr_simd)]

    fn main() {
    #[repr(simd)]
    struct Good([u32; 2]); // ok!
    }