This seems like a reasonable use but errors, obviously I can do it in many other ways:

    ulong[] result = iota(1UL, 10UL).array;


Error: static assert  "Argument types in (ulong) are not all convertible to size_t: (ulong)"	C:\D\dmd2\src\phobos\std\array.d	516	

And while I'm here why do arrays not implicitly cast? ulong is happy to accept uint values but ulong[] will not accept uint[].

On Sunday, 9 August 2015 at 20:13:38 UTC, ixid wrote:
> This seems like a reasonable use but errors, obviously I can do it in many other ways:
>
>     ulong[] result = iota(1UL, 10UL).array;
>
>
> Error: static assert  "Argument types in (ulong) are not all convertible to size_t: (ulong)"	C:\D\dmd2\src\phobos\std\array.d	516	

Yup, bug. Please file an issue at <http://issues.dlang.org/>.

> And while I'm here why do arrays not implicitly cast? ulong is happy to accept uint values but ulong[] will not accept uint[].

That's because the offsets of the elements are different. Reading a ulong means reading 8 bytes. But in a uint[] every element only takes up 4 bytes. So every 2 uint elements would be combined into one ulong. And if the uint[] doesn't have an even number of elements, you'd read beyond array bounds.

You can do that conversion explicitly, but for an implicit conversion that would be too surprising.

On 08/09/2015 10:13 PM, ixid wrote:
> This seems like a reasonable use but errors, obviously I can do it in
> many other ways:
>
>      ulong[] result = iota(1UL, 10UL).array;
>
>
> Error: static assert  "Argument types in (ulong) are not all convertible
> to size_t: (ulong)"    C:\D\dmd2\src\phobos\std\array.d    516
> ...

I consider this to be a bug. Also, it's annoying static assert abuse.

> And while I'm here why do arrays not implicitly cast?

Array literals do cast implicitly.

> ulong is happy to accept uint values but ulong[] will not accept uint[].

Many reasons. E.g. it would be a hidden not-necessarily-constant-time operation.

On Sunday, 9 August 2015 at 20:33:10 UTC, anonymous wrote:
> On Sunday, 9 August 2015 at 20:13:38 UTC, ixid wrote:

> Yup, bug. Please file an issue at <http://issues.dlang.org/>.

It seems like bearophile beat me to it. Good to see he's still alive.

https://issues.dlang.org/show_bug.cgi?id=14832

On 8/9/15 4:40 PM, ixid wrote:
> On Sunday, 9 August 2015 at 20:33:10 UTC, anonymous wrote:
>> On Sunday, 9 August 2015 at 20:13:38 UTC, ixid wrote:
>
>> Yup, bug. Please file an issue at <http://issues.dlang.org/>.
>
> It seems like bearophile beat me to it. Good to see he's still alive.
>
> https://issues.dlang.org/show_bug.cgi?id=14832

PR: https://github.com/D-Programming-Language/phobos/pull/3544

-Steve