On 6/12/18 10:57 AM, Guillaume Piolat wrote:
On Tuesday, 12 June 2018 at 14:44:12 UTC, Steven Schveighoffer wrote:
Note to ponce, please update your idioms, this is NOT safe, even
within the same function. Just because it does work, doesn't mean it
will always work. The language makes no guarantees once the lifetime
is over.
I thought it was clear enough because the comment said
// Slice that static array __which is on stack__
but now I see how it can be hard to see the unsafety.
No, that's not what I mean. What I mean is:
int[] arr = [1,2,3].s;
int[] arr2 = [4,5,6].s;
Legally, the compiler is allowed to reuse the stack memory allocated for
arr for arr2. The lifetime of the arr data is over.
In other words, you should NEVER do this. You should ALWAYS create a
static array on the stack with a variable name, and then slice that if
you need to.
-Steve
