37 lines
864 B
Rust
37 lines
864 B
Rust
#![feature(unsized_tuple_coercion)]
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#![feature(unsized_fn_params)]
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use std::mem;
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fn unsized_tuple() {
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let x: &(i32, i32, [i32]) = &(0, 1, [2, 3]);
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let y: &(i32, i32, [i32]) = &(0, 1, [2, 3, 4]);
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let mut a = [y, x];
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a.sort();
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assert_eq!(a, [x, y]);
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assert_eq!(&format!("{:?}", a), "[(0, 1, [2, 3]), (0, 1, [2, 3, 4])]");
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assert_eq!(mem::size_of_val(x), 16);
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}
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fn unsized_params() {
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pub fn f0(_f: dyn FnOnce()) {}
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pub fn f1(_s: str) {}
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pub fn f2(_x: i32, _y: [i32]) {}
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pub fn f3(_p: dyn Send) {}
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let c: Box<dyn FnOnce()> = Box::new(|| {});
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f0(*c);
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let foo = "foo".to_string().into_boxed_str();
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f1(*foo);
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let sl: Box<[i32]> = [0, 1, 2].to_vec().into_boxed_slice();
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f2(5, *sl);
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let p: Box<dyn Send> = Box::new((1, 2));
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f3(*p);
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}
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fn main() {
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unsized_tuple();
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unsized_params();
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}
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