mirror of https://github.com/rust-lang/rust
42 lines
1.3 KiB
Rust
42 lines
1.3 KiB
Rust
//@ compile-flags: --crate-type=lib
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// When we get multiple `#[default]` variants, we emit several tool-only suggestions
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// to remove all except one of the `#[default]`s.
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#[derive(Default)] //~ ERROR multiple declared defaults
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enum A {
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#[default] //~ HELP make `B` default
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#[default] //~ HELP make `A` default
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A,
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#[default] // also "HELP make `A` default", but compiletest can't handle multispans
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B,
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}
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// Originally, we took each defaulted variant and emitted the suggestion for every variant
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// with a different identifier, causing an ICE when multiple variants have the same identifier:
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// https://github.com/rust-lang/rust/pull/105106
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#[derive(Default)] //~ ERROR multiple declared defaults
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enum E {
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#[default] //~ HELP make `A` default
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A,
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#[default] //~ HELP make `A` default
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A, //~ ERROR defined multiple times
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}
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// Then, we took each defaulted variant and emitted the suggestion for every variant
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// with a different span, causing an ICE when multiple variants have the same span:
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// https://github.com/rust-lang/rust/issues/118119
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macro_rules! m {
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{ $($id:ident)* } => {
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#[derive(Default)] //~ ERROR multiple declared defaults
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enum F {
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$(
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#[default]
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$id,
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)*
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}
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}
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}
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m! { A B }
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