[rustc.git] / compiler / rustc_error_codes / src / error_codes / E0077.md

A tuple struct's element isn't a machine type when using the `#[simd]`
attribute.

Erroneous code example:

```compile_fail,E0077
#![feature(repr_simd)]

#[repr(simd)]
struct Bad(String); // 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, u32, u32, u32); // ok!
```
Commit	Line	Data
60c5eb7d XL	1	A tuple struct's element isn't a machine type when using the `#[simd]`
	2	attribute.
	3
	4	Erroneous code example:
	5
	6	```compile_fail,E0077
	7	#![feature(repr_simd)]
	8
	9	#[repr(simd)]
	10	struct Bad(String); // error!
	11	```
	12
	13	When using the `#[simd]` attribute on a tuple struct, the elements in the tuple
	14	must be machine types so SIMD operations can be applied to them.
	15
	16	Fixed example:
	17
	18	```
	19	#![feature(repr_simd)]
	20
	21	#[repr(simd)]
6a06907d	22	struct Good(u32, u32, u32, u32); // ok!
60c5eb7d	23	```