gistfile1.hpp

#include <cstdio>
#include <cstring>
#include <iostream>
#include <type_traits>
using namespace std;

enum { sz = 8 };

int main() {
  cout << alignment_of<int>::value << endl;

  char a[sz];
  cout << (void*)a << endl;
  bzero(a, sz);

  *((int*)(a+1)) = -1;
  for (int i = 0; i < sz; ++i) printf("%02hhx ", a[i]);
  cout << endl;

  return 0;
}

#if 0
Here's the stdout on x86_64:

4
0x7fff0710a2b0
00 ff ff ff ff 00 00 00 

How did gcc make the unaligned write work?  Did it just generate inefficient code?  I expected a cast-align warning or something.
#endif