87 lines
1.5 KiB
Rust
87 lines
1.5 KiB
Rust
//@ run-pass
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#![feature(trait_upcasting)]
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trait Foo: PartialEq<i32> + std::fmt::Debug + Send + Sync {
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fn a(&self) -> i32 {
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10
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}
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fn z(&self) -> i32 {
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11
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}
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fn y(&self) -> i32 {
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12
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}
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}
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trait Bar: Foo {
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fn b(&self) -> i32 {
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20
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}
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fn w(&self) -> i32 {
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21
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}
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}
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trait Baz: Bar {
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fn c(&self) -> i32 {
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30
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}
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}
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impl Foo for i32 {
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fn a(&self) -> i32 {
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100
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}
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}
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impl Bar for i32 {
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fn b(&self) -> i32 {
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200
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}
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}
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impl Baz for i32 {
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fn c(&self) -> i32 {
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300
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}
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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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assert_eq!(*baz, 1);
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assert_eq!(baz.a(), 100);
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assert_eq!(baz.b(), 200);
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assert_eq!(baz.c(), 300);
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assert_eq!(baz.z(), 11);
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assert_eq!(baz.y(), 12);
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assert_eq!(baz.w(), 21);
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let bar: &dyn Bar = baz;
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let _: &dyn std::fmt::Debug = bar;
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assert_eq!(*bar, 1);
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assert_eq!(bar.a(), 100);
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assert_eq!(bar.b(), 200);
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assert_eq!(bar.z(), 11);
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assert_eq!(bar.y(), 12);
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assert_eq!(bar.w(), 21);
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let foo: &dyn Foo = baz;
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let _: &dyn std::fmt::Debug = foo;
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assert_eq!(*foo, 1);
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assert_eq!(foo.a(), 100);
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assert_eq!(foo.z(), 11);
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assert_eq!(foo.y(), 12);
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let foo: &dyn Foo = bar;
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let _: &dyn std::fmt::Debug = foo;
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assert_eq!(*foo, 1);
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assert_eq!(foo.a(), 100);
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assert_eq!(foo.z(), 11);
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assert_eq!(foo.y(), 12);
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}
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