Python-like Use of the Comma Expression

[Basile B.]

On Thursday, 10 August 2023 at 15:41:16 UTC, ryuukk_ wrote:
> On Thursday, 10 August 2023 at 10:41:12 UTC, Basile B. wrote:
>> On Thursday, 10 August 2023 at 02:28:08 UTC, Timon Gehr wrote:
>>> On 8/8/23 18:47, Vijay Nayar wrote:
>>>> 
>>>> **Question**: Would D benefit from using commas to define 
>>>> tuples rather than triggering an error when the result of a 
>>>> comma-expression is used? Right now, because the errors, the 
>>>> result of a comma expression is a bit of "unused real 
>>>> estate" in the language.
>>>> 
>>>> The easy syntax for dealing with tuples of values is 
>>>> especially useful in writing logic for machine-learning 
>>>> algorithms, and has helped Python gain and hold a strong 
>>>> foothold in this area, but where performance is needed, 
>>>> Python libraries like PyTorch turn to C++. Perhaps this 
>>>> could be D instead.
>>>
>>> The answer is yes, though I don't think changing the 
>>> precedence fits the D grammar.
>>>
>>> My DIP draft: 
>>> https://github.com/tgehr/DIPs/blob/master/DIPs/DIP1xxx-tg.md
>>>
>>
>> That link is for static-foreach, right one is 
>> https://github.com/tgehr/DIPs/blob/tuple-syntax/DIPs/DIP1xxx-tg.md
>
> 6 years ago, wow..
>
> Builtin tuple has been on my wishlist for a long time, time 
> flies too fast..

I'm reading the DIP with fresh eyes today, after having 
implemented tuples for another language. One think I see now, as 
that Timon's DIP, does not investigate, is that tuple 
deconstruction could use [in-situ variable 
declarations](https://gitlab.com/styx-lang/styx/-/releases/v0.10.15), i.e something that's not especially made for tuples and that works as a normal primary expression.