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Document `#![feature(..)]` attribute?

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
52/100
Issue type
Documentation
Clarity
Mostly clear
Activity status
Stale
Tech stack
rust
Domain
documentation

Research direction

Start at the attribute index mentioned in the issue and compare how the other attributes are documented. Document the Rust feature attribute consistently with those entries, including the behavior shown by the example, and verify that the index and dedicated documentation agree.

Written by the indexing model from the issue text.

Description

A-attributes C-bug

This is a valid program on stable Rust:

#![feature()]
#![expect(unused_attributes)]
fn main() {}

Consequently, perhaps we should document the feature attribute in the way we do other attributes. Currently, as best as I see, we mention it in our attribute index but do not otherwise really document it.

cc https://github.com/rust-lang/fls/issues/549 @Jules-Bertholet @ehuss

Dominant language
Rust
Stars
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Forks
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Avg merge
1d 4h
Merged PRs (30d)
7

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