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Add long explanation of E0546

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This commit is contained in:
Daiki Ihara 2020-11-29 20:48:17 +09:00
parent f8e5209a21
commit f2f3a8e645
2 changed files with 28 additions and 1 deletions
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2
compiler/rustc_error_codes/src/error_codes.rs
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@ -283,6 +283,7 @@ E0537: include_str!("./error_codes/E0537.md"),
E0538: include_str!("./error_codes/E0538.md"),
E0539: include_str!("./error_codes/E0539.md"),
E0541: include_str!("./error_codes/E0541.md"),
E0546: include_str!("./error_codes/E0546.md"),
E0550: include_str!("./error_codes/E0550.md"),
E0551: include_str!("./error_codes/E0551.md"),
E0552: include_str!("./error_codes/E0552.md"),
@ -603,7 +604,6 @@ E0779: include_str!("./error_codes/E0779.md"),
E0543, // missing 'reason'
E0544, // multiple stability levels
E0545, // incorrect 'issue'
E0546, // missing 'feature'
E0547, // missing 'issue'
// E0548, // replaced with a generic attribute input check
// rustc_deprecated attribute must be paired with either stable or unstable

27
compiler/rustc_error_codes/src/error_codes/E0546.md Normal file
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@ -0,0 +1,27 @@
A feature name is missing.
Erroneous code example:
```compile_fail,E0546
#![feature(staged_api)]
#![stable(since = "1.0.0", feature = "test")]
#[unstable(issue = "none")] // invalid
fn unstable_fn() {}
#[stable(since = "1.0.0")] // invalid
fn stable_fn() {}
```
To fix the issue you need to provide a feature name.
```
#![feature(staged_api)]
#![stable(since = "1.0.0", feature = "test")]
#[unstable(feature = "unstable_fn", issue = "none")] // ok!
fn unstable_fn() {}
#[stable(feature = "stable_fn", since = "1.0.0")] // ok!
fn stable_fn() {}
```