This commit is contained in:
Jacob Pratt 2022-11-30 21:17:00 +00:00
parent c97b539e40
commit ab264ae612
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GPG Key ID: B80E19E4662B5AA4
3 changed files with 39 additions and 1 deletions

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@ -146,7 +146,7 @@ fn extract_default_variant<'a>(
let suggestion = default_variants
.iter()
.filter_map(|v| {
if v.ident == variant.ident {
if v.span == variant.span {
None
} else {
Some((cx.sess.find_by_name(&v.attrs, kw::Default)?.span, String::new()))

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@ -0,0 +1,9 @@
// compile-flags: --crate-type=lib
#[derive(Default)] //~ ERROR multiple declared defaults
enum E {
#[default]
A,
#[default]
A, //~ ERROR defined multiple times
}

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@ -0,0 +1,29 @@
error: multiple declared defaults
--> $DIR/issue-105101.rs:3:10
|
LL | #[derive(Default)]
| ^^^^^^^
...
LL | A,
| - first default
LL | #[default]
LL | A,
| - additional default
|
= note: only one variant can be default
= note: this error originates in the derive macro `Default` (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0428]: the name `A` is defined multiple times
--> $DIR/issue-105101.rs:8:5
|
LL | A,
| - previous definition of the type `A` here
LL | #[default]
LL | A,
| ^ `A` redefined here
|
= note: `A` must be defined only once in the type namespace of this enum
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0428`.