rust/src/test/compile-fail/dst-bad-deep.rs
2016-04-05 22:56:23 +03:00

26 lines
966 B
Rust

// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// Try to initialise a DST struct where the lost information is deeply nested.
// This is an error because it requires an unsized rvalue. This is a problem
// because it would require stack allocation of an unsized temporary (*g in the
// test).
struct Fat<T: ?Sized> {
ptr: T
}
pub fn main() {
let f: Fat<[isize; 3]> = Fat { ptr: [5, 6, 7] };
let g: &Fat<[isize]> = &f;
let h: &Fat<Fat<[isize]>> = &Fat { ptr: *g };
//~^ ERROR `[isize]: std::marker::Sized` is not satisfied
}