[Bug libstdc++/37144] A bug in include/ext/pb_ds/detail/pat_trie_/constructors_destructor_fn_imps.hpp

["hjl dot tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #12 from hjl dot tools at gmail dot com  2008-12-11 01:17 -------
This program shows the problem:

[hjl@gnu-6 37144]$ cat x.cc 
#include <stdlib.h>
#include <stdio.h>

struct T1
{
  int i;
  T1 () { i = 0; }
  T1 (int x) { i = x; }
  T1 (const T1 &x) { i = x.i; }
  T1&
  operator=(T1 & __p)
    {
      i = __p.i;
      return *this;
    }
};

struct pair
{
  T1 first;
  T1 second;
  pair() : first(), second() { }

  pair(const T1 & __a, const T1 & __b) : first(__a), second(__b) { }

  pair&
  operator=(pair& __p)
    {
      first = __p.first;
      second = __p.second;
      return *this;
    }
};

typedef const T1& const_T1_reference;
typedef const pair & const_pair_reference;

const_T1_reference
extract_key_imp(const_pair_reference r_val)
{ return r_val.first; }

const_T1_reference
extract_key_imp(const_T1_reference r_val)
{ return r_val; }

int
main ()
{
  T1 t1 (21), t2 (3);
  pair p (t1, t2);
  const_T1_reference x = extract_key_imp (p);
  const_T1_reference y = extract_key_imp (t1);
  if (y.i != t1.i)
    abort ();
  if (&y.i != &t1.i)
    abort ();
  if (x.i != t1.i)
    abort ();
  if (&x.i != &t1.i)
    {
      printf ("&x.i != &t1.i\n");
      abort ();
    }
  return 0;
}
[hjl@gnu-6 37144]$ g++ x.cc
[hjl@gnu-6 37144]$ ./a.out 
&x.i != &t1.i
Aborted
[hjl@gnu-6 37144]$ 


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37144