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[rustc.git] / src / test / compile-fail / dst-bad-assign.rs
1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
4 //
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
10
11 // Forbid assignment into a dynamically sized type.
12
13 struct Fat<T: ?Sized> {
14 f1: isize,
15 f2: &'static str,
16 ptr: T
17 }
18
19 #[derive(PartialEq,Eq)]
20 struct Bar;
21
22 #[derive(PartialEq,Eq)]
23 struct Bar1 {
24 f: isize
25 }
26
27 trait ToBar {
28 fn to_bar(&self) -> Bar;
29 fn to_val(&self) -> isize;
30 }
31
32 impl ToBar for Bar1 {
33 fn to_bar(&self) -> Bar {
34 Bar
35 }
36 fn to_val(&self) -> isize {
37 self.f
38 }
39 }
40
41 pub fn main() {
42 // Assignment.
43 let f5: &mut Fat<ToBar> = &mut Fat { f1: 5, f2: "some str", ptr: Bar1 {f :42} };
44 // FIXME (#22405): Replace `Box::new` with `box` here when/if possible.
45 let z: Box<ToBar> = Box::new(Bar1 {f: 36});
46 f5.ptr = Bar1 {f: 36};
47 //~^ ERROR mismatched types
48 //~| expected `ToBar`
49 //~| found `Bar1`
50 //~| expected trait ToBar
51 //~| found struct `Bar1`
52 //~| ERROR `ToBar: std::marker::Sized` is not satisfied
53 }