Can now use alias for collapsing multiple fields in nested structs

[Richard (Rikki) Andrew Cattermole]

On 02/01/2025 9:16 PM, Walter Bright wrote:
> On 12/30/2024 4:08 AM, ryuukk_ wrote:
>> ```D
>> struct Tada {
>>      struct {
>>          int a;
>>          int b;
>>      } data;
>> };
>>
>>
>> Tada tada;
>> tada.data.a = 42;
>> ```
>>
>> but D can't do that
> 
> That's deliberate, not a shortcoming.
> 
> There's no purpose to writing declarations that way, unless you're using C.

Or writing a binding to C.

Or needing to group some fields together and not have names overlap in a 
union. Useful when writing a sum type. Such as an AST.

Or wanting to guarantee a specific bitfield layout... (perhaps matching C!)

I'd love to have this and would use it quite frequently.

Its a feature that once you learn that it exists, but not in D, you long 
for it, even if it isn't worth making noise over.