50 lines
1.1 KiB
Rust
50 lines
1.1 KiB
Rust
// run-pass
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#![feature(unsized_locals)]
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pub trait Foo {
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fn foo(self) -> String;
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}
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impl Foo for [char] {
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fn foo(self) -> String {
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self.iter().collect()
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}
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}
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impl Foo for str {
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fn foo(self) -> String {
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self.to_owned()
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}
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}
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impl Foo for dyn FnMut() -> String {
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fn foo(mut self) -> String {
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self()
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}
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}
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fn main() {
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let x = *(Box::new(['h', 'e', 'l', 'l', 'o']) as Box<[char]>);
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assert_eq!(&x.foo() as &str, "hello");
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let x = Box::new(['h', 'e', 'l', 'l', 'o']) as Box<[char]>;
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assert_eq!(&x.foo() as &str, "hello");
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let x = "hello".to_owned().into_boxed_str();
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assert_eq!(&x.foo() as &str, "hello");
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let x = *("hello".to_owned().into_boxed_str());
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assert_eq!(&x.foo() as &str, "hello");
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let x = "hello".to_owned().into_boxed_str();
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assert_eq!(&x.foo() as &str, "hello");
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let x = *(Box::new(|| "hello".to_owned()) as Box<dyn FnMut() -> String>);
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assert_eq!(&x.foo() as &str, "hello");
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let x = Box::new(|| "hello".to_owned()) as Box<dyn FnMut() -> String>;
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assert_eq!(&x.foo() as &str, "hello");
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}
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