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Update RELEASES to clarify attribute macro values. #88057

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Aug 22, 2021
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Update RELEASES to clarify attribute macro values. #88057

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13 changes: 4 additions & 9 deletions RELEASES.md
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Expand Up @@ -4,18 +4,13 @@ Version 1.54.0 (2021-07-29)
Language
-----------------------

- [You can now use macros for values in built-in attribute macros.][83366]
While a seemingly minor addition on its own, this enables a lot of
powerful functionality when combined correctly. Most notably you can
now include external documentation in your crate by writing the following.
- [You can now use macros for values in some built-in attributes.][83366]
This primarily allows you to call macros within the `#[doc]` attribute. For
example, to include external documentation in your crate, you can now write
the following:
```rust
#![doc = include_str!("README.md")]
```
You can also use this to include auto-generated modules:
```rust
#[path = concat!(env!("OUT_DIR"), "/generated.rs")]
mod generated;
```

- [You can now cast between unsized slice types (and types which contain
unsized slices) in `const fn`.][85078]
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