mirror of https://github.com/rust-lang/rust
50 lines
1.1 KiB
Rust
50 lines
1.1 KiB
Rust
trait Trait {
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fn xyz() -> bool;
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}
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impl Trait for dyn Send + Sync {
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fn xyz() -> bool { false }
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}
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impl Trait for dyn Sync + Send {
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//~^ ERROR conflicting implementations
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fn xyz() -> bool { true }
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}
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trait Trait2 {
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fn uvw() -> bool;
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}
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impl Trait2 for dyn Send + Sync {
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fn uvw() -> bool { false }
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}
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impl Trait2 for dyn Sync + Send + Sync {
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//~^ ERROR conflicting implementations
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fn uvw() -> bool { true }
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}
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struct Foo<T: ?Sized>(T);
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impl Foo<dyn Send + Sync> {
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fn abc() -> bool { //~ ERROR duplicate definitions with name `abc`
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false
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}
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}
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impl Foo<dyn Sync + Send> {
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fn abc() -> bool {
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true
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}
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}
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fn main() {
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assert_eq!(<dyn Send + Sync>::xyz(), false);
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assert_eq!(<dyn Sync + Send>::xyz(), true);
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assert_eq!(<dyn Send + Sync>::uvw(), false);
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assert_eq!(<dyn Sync + Send+ Sync>::uvw(), true);
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assert_eq!(<Foo<dyn Send + Sync>>::abc(), false);
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//~^ ERROR: multiple applicable items in scope
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assert_eq!(<Foo<dyn Sync + Send>>::abc(), true);
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//~^ ERROR: multiple applicable items in scope
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}
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