69 lines
1.5 KiB
Rust
69 lines
1.5 KiB
Rust
//@ run-pass
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#![allow(dead_code)]
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#![allow(unused_variables)]
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// Test that we can use `Self` types in impls in the expected way.
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//@ pretty-expanded FIXME #23616
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struct Foo;
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// Test uses on inherent impl.
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impl Foo {
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fn foo(_x: Self, _y: &Self, _z: Box<Self>) -> Self {
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Foo
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}
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fn baz() {
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// Test that Self cannot be shadowed.
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type Foo = i32;
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// There is no empty method on i32.
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Self::empty();
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let _: Self = Foo;
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}
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fn empty() {}
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}
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// Test uses when implementing a trait and with a type parameter.
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pub struct Baz<X> {
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pub f: X,
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}
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trait SuperBar {
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type SuperQux;
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}
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trait Bar<X>: SuperBar {
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type Qux;
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fn bar(x: Self, y: &Self, z: Box<Self>, _: Self::SuperQux) -> Self;
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fn dummy(&self, x: X) { }
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}
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impl SuperBar for Box<Baz<isize>> {
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type SuperQux = bool;
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}
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impl Bar<isize> for Box<Baz<isize>> {
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type Qux = i32;
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fn bar(_x: Self, _y: &Self, _z: Box<Self>, _: Self::SuperQux) -> Self {
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let _: Self::Qux = 42;
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let _: <Self as Bar<isize>>::Qux = 42;
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let _: Self::SuperQux = true;
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let _: <Self as SuperBar>::SuperQux = true;
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Box::new(Baz { f: 42 })
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}
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}
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fn main() {
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let _: Foo = Foo::foo(Foo, &Foo, Box::new(Foo));
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let _: Box<Baz<isize>> = Bar::bar(Box::new(Baz { f: 42 }),
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&Box::new(Baz { f: 42 }),
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Box::new(Box::new(Baz { f: 42 })),
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true);
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}
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