On 01/26/2011 07:23 PM, Steven Schveighoffer wrote:
On Wed, 26 Jan 2011 12:27:37 -0500, spir <denis.s...@gmail.com> 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. It should instead, I guess, check all elements are compatible with the defined array type. An additional enigma is why the failing element t1 is said to be of supertype T0 --which is also correct-- while it retained t2's exact type T2. ??? Anyway, is there a workaround?auto ts = cast(T0[])[t1, t2];
Nope, refused for the same reason (tried to construct [t1,t2] before casting it). Denis -- _________________ vita es estrany spir.wikidot.com
