Re: Problem with array objects
"Joshua Maurice" <joshuamaurice@gmail.com> wrote in message
news:b12da5e7-c40d-4926-8311-74b4d999ecdd@s16g2000prf.googlegroups.com...
On Jun 1, 2:59 pm, "Paul" <pchris...@yahoo.co.uk> wrote:
"Ian Collins" <ian-n...@hotmail.com> wrote in message
If its an object then , as defined in the standards, an object is a
region
of storage, so where is this object stored? It cannot be stored int he
same
region as its elements because that region of storage is modifiable.
Consider:
struct X { mutable int n; };
int main()
{
const X x1 = {0};
X x2 = {1};
x1 = x2; // Error, x1 isn't modifiable.
x1.n = x2.n; // OK, x1.n is.
}
Are there two instances of x1?
When you modify x1.n you also modify x1.
x1 has ben modified so how can you say its a non modifable object.
--It's easy. Consider:
-- int x = 0;
-- int const& y = x;
--We say that "y" is non-modifiable. That is, you cannot modify the
--object referred to by "y" through the expression "y". However, you can
--modify the object referred to by "y" through other expressions, such
--as "x". Ex:
-- x = 1;
--There. I just modified "y" when "y" is non-modifiable.
'y' is a reference , you did not modify 'y'. To modify 'y' you would need to
make it reference another object.