On 02.11.2011 22:19, deadalnix wrote:
Le 31/10/2011 21:25, Timon Gehr a écrit :
On 10/31/2011 08:34 PM, bearophile wrote:
I don't see the need to accept this cast, because we have said that D
arrays are not pointers, and allowing the array to pointer cast means
introducing/leaving an useless special case, and in practice this
special case is not useful because arrays have the ptr property:
extern(C) void foo(char* str);
foo(cast(char*)"hello");
struct Foo {
int* p;
size_t n;
}
void main() {
Foo f;
auto x = f.ptr; // OK
}
Actually compile error :o).
So I think cast(int*)a1 should be forbidden.
-1. I don't really see any point in disallowing it. It is an explicit
cast, not some kind of bug prone implicit behaviour.
Well, because the ptr property is done for that. Actually, D ABI says
that the struct representing the array begins with length, then prt, so
the result isn't obvious from a low level perspective, which is kinda
sad when it goes to pointer manipulation.
The fix has already been implemented in git master. The bug report is
closed.
There's no point commenting on this topic further.
