Rust errors / Types and traits
Rust compiler error · checked with rustc 1.99.0
Rust error E0076: SIMD vector's only field must be an array
What it meansThe type of the field in a tuple struct isn't an array when using the #[simd] attribute.
What rustc prints
error[E0076]: SIMD vector's only field must be an array
--> main.rs:4:1
|
4 | struct Bad(u16); // error!
| ^^^^^^^^^^ --- not an arrayReal output of rustc 1.99.0 compiling the official example below (2021 edition). Your names and line numbers will differ; the first line is the part to match.
The compiler team's explanation
The type of the field in a tuple struct isn't an array when using the #[simd] attribute.
Erroneous code example:
#![feature(repr_simd)]
#[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:
#![feature(repr_simd)]
#[repr(simd)]
struct Good([u16; 1]); // ok!From rustc --explain E0076 (1.99.0), part of the Rust project, MIT or Apache-2.0. Official page.
Related errors
- E0308mismatched types
- E0277the trait bound is not satisfied
- E0599no method named X found in the current scope
- E0433failed to resolve
- E0071expected struct, variant or union type, found `u32`
- E0072recursive type has infinite size
- E0077SIMD vector element type should be a primitive scalar (integer/float/pointer) type
- E0091type parameter `T` is never used
Up next
Often hit nextE0308: mismatched typesA related error from the same family.Read it next →Did this answer your question?