On Wednesday, 12 March 2014 at 03:37:49 UTC, ed wrote:
Thanks for explaining this, it makes sense what you said. But
I'm still not sure why my original Example 1 worked.
~~~
// This works OK and converts long[4] to int[] then implicitly
to int[2][2]
long[4] a=[1,2,3,4];
int[2][2] b = to!(int[])(a);
// Why does this not work the same way?
long[4] a=[1,2,3,4];
int[2][2] b;
b = to!(int[])(a);
~~~
My understanding of your explanation is that it shouldn't work.
Cheers,
ed
I *believe* it's really just that you are allowed to *initialize*
a static array (of any depth) from a dynamic array.
However, for assignment, it doesn't work that way:
int[] a = [0, 1, 2, 3];
int[2][1][2][1] b = a; //OK!
b = a; //ERROR
If you want do want to do the assignment, you'll have to
re-interpret your array's layout:
int[] a = [0, 1, 2, 3];
int[2][1][2][1] b;
*cast(int[4]*)&b = a;
assert(b == [[[[0, 1]], [[2, 3]]]]);
