Rust errors / Attributes, macros and features
Rust compiler error · checked with rustc 1.99.0
Rust error E0075: SIMD vector cannot be empty
What it meansA #[simd] attribute was applied to an empty or multi-field struct.
What rustc prints
error[E0075]: SIMD vector cannot be empty
--> main.rs:4:1
|
4 | struct Bad; // error!
| ^^^^^^^^^^Real 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.
E0075Attributes, macros and features
Activein rustc 1.99.0
3related errors linked below
The compiler team's explanation
A #[simd] attribute was applied to an empty or multi-field struct.
Erroneous code examples:
#![feature(repr_simd)]
#[repr(simd)]
struct Bad; // error!#![feature(repr_simd)]
#[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:
#![feature(repr_simd)]
#[repr(simd)]
struct Good([u32; 2]); // ok!From rustc --explain E0075 (1.99.0), part of the Rust project, MIT or Apache-2.0. Official page.
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