On Monday, 16 June 2014 at 11:54:27 UTC, Daniel Murphy wrote:
Couldn't "array dimension" be either in bytes or in T units,
for a T[]? It seems to be in bytes (I had assumed it was in T
units). If you agree that it is ambiguous, please tweak the
description to be more precise.
It _is_ in T units. It is exactly the dimension of the array,
not the size in memory.
Ah, OK. I was mislead by the following:
1: int[] a1 = [42];
2: ubyte[] a2 = cast(ubyte[]) a1;
3: writeln(a2);
I thought line 2 did a reinterpret_cast on the a1 array header
(length + ptr), so I expected a2 == [42], but it is equal to [42,
0, 0, 0] (casts the array contents, adjusts the array length).
Forcing a reinterpret_cast-style cast shows that indeed length is
in T units, as I originally expected:
int[] a1 = [42];
void* p = &a1;
ubyte[] a2 = *cast(ubyte[]*) p;
assert(a2 == [42]);
