mirror of https://github.com/rust-lang/rust
53 lines
920 B
Rust
53 lines
920 B
Rust
#![allow(incomplete_features)]
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#![feature(unsized_locals, unsized_fn_params)]
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use std::fmt;
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fn gen_foo() -> Box<fmt::Display> {
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Box::new(Box::new("foo"))
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}
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fn foo(x: fmt::Display) {
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assert_eq!(x.to_string(), "foo");
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}
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fn foo_indirect(x: fmt::Display) {
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foo(x);
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}
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fn main() {
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foo(*gen_foo());
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foo_indirect(*gen_foo());
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{
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let x: fmt::Display = *gen_foo();
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foo(x);
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}
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{
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let x: fmt::Display = *gen_foo();
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let y: fmt::Display = *gen_foo();
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foo(x);
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foo(y);
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}
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{
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let mut cnt: usize = 3;
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let x = loop {
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let x: fmt::Display = *gen_foo();
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if cnt == 0 {
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break x;
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} else {
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cnt -= 1;
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}
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};
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foo(x);
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}
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{
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let x: fmt::Display = *gen_foo();
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let x = if true { x } else { *gen_foo() };
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foo(x);
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}
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}
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