Discussion Thread: DIP 1039--Static Arrays with Inferred Length--Community Review Round 1

[Steven Schveighoffer]

On 1/6/21 1:14 PM, Luhrel wrote:
> On Wednesday, 6 January 2021 at 17:59:57 UTC, Jacob Carlborg wrote:
>> On 2021-01-06 10:21, Mike Parker wrote:
>>> This is the discussion thread for the first round of Community Review 
>>> of DIP 1039, "Static Arrays with Inferred Length":
>>>
>>> https://github.com/dlang/DIPs/blob/c06ce7f144b3dabf363d1896ddcd31a2a6b7c969/DIPs/DIP1039.md 
>>>
>>
>> There's `staticArray` to solve this issue [1].
>>
>> [1] https://dlang.org/phobos/std_array.html#.staticArray
> 
> It works only for the `int` type and above (and other types as structs).
> 
> example with short:
> ---
> extern(C) void main()
> {
>      import std.array;
>      auto a = [0, 1].staticArray!short;  // error
> }
> ---
> 
> To fix that, I need to cast every element:
> ---
> extern(C) void main()
> {
>      import std.array;
>      auto a = [cast(short) 1, cast(short) 2].staticArray!short; // ok
> }
> ---

With a tweak, it's possible:

T[n] staticArray(T, size_t n)(T[n] val...) { return val; }

auto arr = staticArray!short(1, 2);

Though the syntax isn't as nice...

-Steve