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// Check that we apply unsizing coercions based on the return type.
//
// Also serves as a regression test for #60424.
//
// edition:2018
// check-pass
#![allow(warnings)]
use std::fmt::Debug;
// Unsizing coercion from `Box<&'static str>` to `Box<dyn Debug>`.
fn unsize_trait_coercion() {
fn sync_example() -> Box<dyn Debug> {
Box::new("asdf")
}
async fn async_example() -> Box<dyn Debug> {
Box::new("asdf")
}
}
// Unsizing coercion from `Box<[u32; N]>` to `Box<[32]>`.
fn unsize_slice_coercion() {
fn sync_example() -> Box<[u32]> {
Box::new([0])
}
async fn async_example() -> Box<[u32]> {
Box::new([0])
}
}
// Unsizing coercion from `&[&str; 1]` to `&[&str]`
fn unsize_slice_str_coercion() {
fn sync_example() -> &'static [&'static str] {
&["hi"]
}
async fn async_example() -> &'static [&'static str] {
&["hi"]
}
}
fn main() {}
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