On Monday, 17 January 2022 at 00:54:19 UTC, forkit wrote:
..
module test;
import std;
@safe void main()
{
// mArr1 is a dynamic array allocated on the gc heap.
int[][] mArr1 = [[1, 2], [3, 4], [5, 6], [7, 8]];
static assert(is(typeof(mArr1.array())));
alias R1 = typeof(mArr1);
static assert(isRandomAccessRange!R1 &&
isForwardRange!R1 &&
isInputRange!R1 &&
isBidirectionalRange!R1 &&
hasAssignableElements!R1 &&
!isInfinite!R1 &&
hasSlicing!R1);
// mArr2 is a dynamic array allocated on the gc heap
// although compiling with '-profile=gc' incorrectly suggests
otherwise.
int[][] mArr2 = iota(1, 9).chunks(2).map!array.array;
static assert(is(typeof(mArr2.array())));
alias R2 = typeof(mArr2);
static assert(isRandomAccessRange!R2 &&
isForwardRange!R2 &&
isInputRange!R2 &&
isBidirectionalRange!R2 &&
hasAssignableElements!R2 &&
!isInfinite!R2 &&
hasSlicing!R2);
static assert(is(typeof(mArr1) == typeof(mArr2)));
}
/+
if add @nogc to above code:
(8): Error: array literal in `@nogc` function `D main` may cause
a GC allocation
(22): Error: `@nogc` function `D main` cannot call non-@nogc
function `std.array.array!(MapResult!(array,
Chunks!(Result))).array`
+/
