OT: Tuple Syntax and Placeholders (Re: First Draft: Tuple Unpacking Syntax)

[Richard (Rikki) Andrew Cattermole]

On 01/08/2025 10:08 PM, Nick Treleaven wrote:
> On Sunday, 27 July 2025 at 21:52:15 UTC, Richard (Rikki) Andrew 
> Cattermole wrote:
>> 2. Moving elements should be in DIP even if implementation doesn't 
>> support it. I don't think anything special needs to be done here. My 
>> understanding is the compiler should be seeing the VarDeclaration -> 
>> VarDeclaration assignment and handle it normally.
> 
> I think you are asking for something special:
> 
> ```d
>      T a, b;
>      alias seq = AliasSeq!(a, b);
>      // auto (x, y) = a;
>      auto x = a[0];
>      auto y = a[1];
> ```
> 
> `a[0]` and `a[1]` are not moved by the lowered code.
> 
> Do you have an example where there should be a move?

You are getting to what I was thinking, there is no reason to mention 
copying or moving. Its defined behavior elsewhere.