spir wrote:
Hello,
This fails:
class T0 {}
class T1 : T0 {}
class T2 : T0 {}
unittest {
auto t1 = new T1();
auto t2 = new T2();
T0[] ts = [t1, t2];
}
Error: cannot implicitly convert expression (t1) of type __trials__.T0
to __trials__.T2
Error: cannot implicitly convert expression ([(__error),t2]) of type
T2[] to T0[]
I guess it should be accepted due to explicite typing 'T0[]'. What do
you think? D first determines the type of the last element (always the
last one), here T2. Then, /ignoring/ the array's defined type, tries to
cast other elements to the same type T2.
No, it's not supposed to do that. What is supposed to happen is, to use
?: to determine the common type of the array. This will give a T0[] array.
Then, it attempts to implicitly cast to the defined type.
Your code should work. You've just hit an implementation bug.
