std::cout << *new int(1, 2) << std::endl;

MW>std::cout << *new int(1, 2) << std::endl;
MW>

MW>Нормальные компиляторы (gcc, comeau) выдают ошибку. Кстати, подсветка ошибок в VS 2010 тоже

A new-expression that creates an object of type T initializes that object as follows:
— If the new-initializer is omitted:
— If T is a (possibly cv-qualified) non-POD class type (or array thereof), the object is defaultinitialized
(8.5). If T is a const-qualified type, the underlying class type shall have a user-declared
default constructor.
— Otherwise, the object created has indeterminate value. If T is a const-qualified type, or a (possibly
cv-qualified) POD class type (or array thereof) containing (directly or indirectly) a member of
const-qualified type, the program is ill-formed;
— If the new-initializer is of the form (), the item is value-initialized (8.5);
— If the new-initializer is of the form (expression-list) and T is a class type, the appropriate constructor is
called, using expression-list as the arguments (8.5);
— If the new-initializer is of the form (expression-list) and T is an arithmetic, enumeration, pointer, or
pointer-to-member type and expression-list comprises exactly one expression, then the object is initialized
to the (possibly converted) value of the expression (8.5);
— Otherwise the new-expression is ill-formed.

The initialization that occurs in new expressions (5.3.4), static_cast expressions (5.2.9), functional
notation type conversions (5.2.3), and base and member initializers (12.6.2) is called direct-initialization
and is equivalent to the form
T x(a);

int main()
{
 int i(1,2); // так нельзя. Требуется одно выражение
}

struct s
{
 int i;
 s() : i(1, 2) // так нельзя тоже
 { }
}

int main()
{
}

int main()
{
  new int( (1, 2) );
  int i ( (1, 2) );
  
  int j = { 1 };
  int h = { (1, 2) };
}