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Auto merge of #117537 - GKFX:offset-of-enum-feature, r=cjgillot

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Feature gate enums in offset_of

As requested at https://github.com/rust-lang/rust/issues/106655#issuecomment-1790815262, put enums in offset_of behind their own feature gate.

`@rustbot` label F-offset_of
This commit is contained in:
bors 2023-11-05 13:44:59 +00:00
commit 992943dbae
10 changed files with 70 additions and 5 deletions
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4
compiler/rustc_error_codes/src/error_codes/E0795.md
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@ -3,7 +3,7 @@ Invalid argument for the `offset_of!` macro.
Erroneous code example:
```compile_fail,E0795
#![feature(offset_of)]
#![feature(offset_of, offset_of_enum)]
let x = std::mem::offset_of!(Option<u8>, Some);
```
@ -16,7 +16,7 @@ The offset of the contained `u8` in the `Option<u8>` can be found by specifying
the field name `0`:
```
#![feature(offset_of)]
#![feature(offset_of, offset_of_enum)]
let x: usize = std::mem::offset_of!(Option<u8>, Some.0);
```