On 7/21/20 7:10 AM, IGotD- wrote:
On Monday, 20 July 2020 at 22:05:35 UTC, WhatMeWorry wrote:
2) "The total size of a static array cannot exceed 16Mb" What limits
this? And with modern systems of 16GB and 32GB, isn't 16Mb excessively
small? (an aside: shouldn't that be 16MB in the reference instead of
16Mb? that is, Doesn't b = bits and B = bytes)
I didn't know this but it makes sense and I guess this is a constraint
of the D language itself. In practice 16MB should be well enough for
most cases. I'm not sure where 16MB is taken from, if there is any OS
out there that has this limitation or if it was just taken as an
adequate limit.
I believe it stems from a limitation in the way the stacks are
allocated? Or maybe a limitation in DMC, the basis for DMD.
Also, you CAN actually have larger arrays, they just cannot be put on
the stack (which most static arrays are):
struct S
{
ubyte[17_000_000] big;
}
void main()
{
auto s = new S; // ok
S s; // crash (signal 11 on run.dlang.io)
}
This may not work if `big` had a static initializer, I'm not sure.
-Steve
