66 lines
1.6 KiB
Rust
66 lines
1.6 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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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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#![allow(unknown_features)]
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#![feature(box_syntax)]
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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 Bar<X> {
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type Qux;
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fn bar(x: Self, y: &Self, z: Box<Self>) -> Self;
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fn dummy(&self, x: X) { }
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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 {
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let _: Self::Qux = 42;
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let _: <Self as Bar<isize>>::Qux = 42;
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box 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 Foo);
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let _: Box<Baz<isize>> = Bar::bar(box Baz { f: 42 },
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&box Baz { f: 42 },
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box box Baz { f: 42 });
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}
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