On Tuesday, 14 December 2021 at 08:44:02 UTC, rumbu wrote:
I am trying to understand why in this two different cases
(Simple and Complex), the compiler behaviour is different.
```d
struct SimpleStruct { int x;}
struct ComplexStruct { int[] x; }
void main()
{
SimpleStruct[] buf1;
immutable(SimpleStruct)[] ibuf1;
buf1[0 .. 10] = ibuf1[0 .. 10];
//this works
ComplexStruct[] buf2;
immutable(ComplexStruct)[] ibuf2;
buf2[0 .. 10] = ibuf2[0 .. 10];
//error cannot implicitly convert expression `ibuf2[0..10]`
of type `immutable(ComplexStruct)[]` to `ComplexStruct[]`
}
```
Because is(typeof(immutable(ComplexStruct).x) ==
immutable(int[])). Can't bind an array of immutable to array of
mutable. This would require a deep copy, i.e. copy constructor.
