| // Copyright 2016 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. |
| |
| use std::mem; |
| |
| struct A { x: i32, y: f64 } |
| |
| #[cfg(not(works))] |
| unsafe fn access(n:*mut A) -> (i32, f64) { |
| let x : i32 = n.x; //~ no field `x` on type `*mut A` |
| let y : f64 = n.y; //~ no field `y` on type `*mut A` |
| (x, y) |
| } |
| |
| #[cfg(works)] |
| unsafe fn access(n:*mut A) -> (i32, f64) { |
| let x : i32 = (*n).x; |
| let y : f64 = (*n).y; |
| (x, y) |
| } |
| |
| fn main() { |
| let a : A = A { x: 3, y: 3.14 }; |
| let p : &A = &a; |
| let (x,y) = unsafe { |
| let n : *mut A = mem::transmute(p); |
| access(n) |
| }; |
| println!("x: {}, y: {}", x, y); |
| } |
