Rust errors / Types and traits
Rust compiler error · checked with rustc 1.99.0
Rust error E0077: SIMD vector element type should be a primitive scalar (integer/float/pointer) type
What it meansA tuple struct's element isn't a machine type when using the #[simd] attribute.
What rustc prints
error[E0077]: SIMD vector element type should be a primitive scalar (integer/float/pointer) type
--> main.rs:4:1
|
4 | struct Bad([String; 2]); // 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.
E0077Types and traits
Activein rustc 1.99.0
8related errors linked below
The compiler team's explanation
A tuple struct's element isn't a machine type when using the #[simd] attribute.
Erroneous code example:
#![feature(repr_simd)]
#[repr(simd)]
struct Bad([String; 2]); // error!When using the #[simd] attribute on a tuple struct, the elements in the tuple must be machine types so SIMD operations can be applied to them.
Fixed example:
#![feature(repr_simd)]
#[repr(simd)]
struct Good([u32; 4]); // ok!From rustc --explain E0077 (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
- E0072recursive type has infinite size
- E0076SIMD vector's only field must be an array
- E0091type parameter `T` is never used
- E0094intrinsic has wrong number of type parameters: found 2, expected 1
Up next
Often hit nextE0308: mismatched typesA related error from the same family.Read it next →Did this answer your question?