fork download
copy 
  1. use std::mem;
  2.  
  3. #[repr(C, packed)]
  4. struct S {
  5.     pad: u8,
  6.     arr: [u8; 32],
  7. }
  8.  
  9. fn main() {
  10.     println!("align_of::<u8>()       = {}", mem::align_of::<u8>());
  11.     println!("align_of::<[u8; 32]>() = {}", mem::align_of::<[u8; 32]>());
  12.     println!("align_of::<usize>()    = {}", mem::align_of::<usize>());
  13.  
  14.     let s = S { pad: 0, arr: [0; 32] };
  15.  
  16.     let addr = &s.arr as *const _ as usize;
  17.     let aligned = addr % mem::align_of::<usize>() == 0;
  18.  
  19.     println!("\nAddress of s.arr: {:#x}", addr);
  20.     println!("aligned_to_usize = {}", aligned);
  21. }
  22.  
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
align_of::<u8>()       = 1
align_of::<[u8; 32]>() = 1
align_of::<usize>()    = 8

Address of s.arr: 0x7fff2bbae1c1
aligned_to_usize = false
https://ideone.com/GJpcpz
language:
Rust (rust 1.56)
created:
5 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!