mirror of https://github.com/rust-lang/rust
28 lines
560 B
Rust
28 lines
560 B
Rust
use std::mem;
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struct A { x: i32, y: f64 }
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#[cfg(not(FALSE))]
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unsafe fn access(n:*mut A) -> (i32, f64) {
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let x : i32 = n.x; //~ no field `x` on type `*mut A`
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let y : f64 = n.y; //~ no field `y` on type `*mut A`
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(x, y)
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}
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#[cfg(FALSE)]
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unsafe fn access(n:*mut A) -> (i32, f64) {
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let x : i32 = (*n).x;
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let y : f64 = (*n).y;
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(x, y)
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}
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fn main() {
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let a : A = A { x: 3, y: 3.14 };
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let p : &A = &a;
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let (x,y) = unsafe {
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let n : *mut A = mem::transmute(p);
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access(n)
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};
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println!("x: {}, y: {}", x, y);
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}
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