E0076 - Error codes index
Description: Book listing all Rust error codes

# Error code E0076

The type of the field in a tuple struct isn't an array when using the `#[simd]` attribute.

Erroneous code example:

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

    fn main() {
    #[repr(simd)]
    struct Bad(u16); // error!
    }

When using the `#[simd]` attribute to automatically use SIMD operations in tuple structs, if you want a single-lane vector then the field must be a 1-element array, or the compiler will trigger this error.

Fixed example:

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

    fn main() {
    #[repr(simd)]
    struct Good([u16; 1]); // ok!
    }