69 lines
1.9 KiB
Rust
69 lines
1.9 KiB
Rust
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#![feature(trait_upcasting)]
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trait Foo {
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fn a(&self) -> i32 { 10 }
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fn z(&self) -> i32 { 11 }
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fn y(&self) -> i32 { 12 }
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}
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trait Bar {
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fn b(&self) -> i32 { 20 }
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fn w(&self) -> i32 { 21 }
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}
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trait Baz {
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fn c(&self) -> i32 { 30 }
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}
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impl Foo for i32 {
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fn a(&self) -> i32 { 100 }
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}
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impl Bar for i32 {
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fn b(&self) -> i32 { 200 }
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}
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impl Baz for i32 {
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fn c(&self) -> i32 { 300 }
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}
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fn main() {
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let baz: &dyn Baz = &1;
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let _: &dyn std::fmt::Debug = baz;
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//~^ ERROR `dyn Baz` doesn't implement `std::fmt::Debug` [E0277]
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let _: &dyn Send = baz;
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//~^ ERROR `dyn Baz` cannot be sent between threads safely [E0277]
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let _: &dyn Sync = baz;
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//~^ ERROR `dyn Baz` cannot be shared between threads safely [E0277]
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let bar: &dyn Bar = baz;
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//~^ ERROR the trait bound `dyn Baz: Bar` is not satisfied [E0277]
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let _: &dyn std::fmt::Debug = bar;
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//~^ ERROR `dyn Bar` doesn't implement `std::fmt::Debug` [E0277]
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let _: &dyn Send = bar;
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//~^ ERROR `dyn Bar` cannot be sent between threads safely [E0277]
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let _: &dyn Sync = bar;
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//~^ ERROR `dyn Bar` cannot be shared between threads safely [E0277]
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let foo: &dyn Foo = baz;
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//~^ ERROR the trait bound `dyn Baz: Foo` is not satisfied [E0277]
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let _: &dyn std::fmt::Debug = foo;
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//~^ ERROR `dyn Foo` doesn't implement `std::fmt::Debug` [E0277]
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let _: &dyn Send = foo;
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//~^ ERROR `dyn Foo` cannot be sent between threads safely [E0277]
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let _: &dyn Sync = foo;
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//~^ ERROR `dyn Foo` cannot be shared between threads safely [E0277]
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let foo: &dyn Foo = bar;
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//~^ ERROR the trait bound `dyn Bar: Foo` is not satisfied [E0277]
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let _: &dyn std::fmt::Debug = foo;
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//~^ ERROR `dyn Foo` doesn't implement `std::fmt::Debug` [E0277]
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let _: &dyn Send = foo;
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//~^ ERROR `dyn Foo` cannot be sent between threads safely [E0277]
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let _: &dyn Sync = foo;
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//~^ ERROR `dyn Foo` cannot be shared between threads safely [E0277]
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}
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