| // 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. |
| |
| // Forbid assignment into a dynamically sized type. |
| |
| struct Fat<T: ?Sized> { |
| f1: isize, |
| f2: &'static str, |
| ptr: T |
| } |
| |
| #[derive(PartialEq,Eq)] |
| struct Bar; |
| |
| #[derive(PartialEq,Eq)] |
| struct Bar1 { |
| f: isize |
| } |
| |
| trait ToBar { |
| fn to_bar(&self) -> Bar; |
| fn to_val(&self) -> isize; |
| } |
| |
| impl ToBar for Bar1 { |
| fn to_bar(&self) -> Bar { |
| Bar |
| } |
| fn to_val(&self) -> isize { |
| self.f |
| } |
| } |
| |
| pub fn main() { |
| // Assignment. |
| let f5: &mut Fat<ToBar> = &mut Fat { f1: 5, f2: "some str", ptr: Bar1 {f :42} }; |
| let z: Box<ToBar> = Box::new(Bar1 {f: 36}); |
| f5.ptr = *z; |
| //~^ ERROR the size for values of type |
| |
| } |