Trait or builtin that returns arguments passed to current function (if any)

[bauss]

On Thursday, 9 September 2021 at 09:22:35 UTC, Dukc wrote:
> On Wednesday, 8 September 2021 at 21:53:21 UTC, Per Nordlöw 
> wrote:
>> Adam, and like others including me, are longing for a 
>> trait/builtin [1] that returns the parameters passed to the 
>> function of the current scope (if any). Has such a thing been 
>> proposed previously?
>>
>> [1] 
>> http://dpldocs.info/this-week-in-d/Blog.Posted_2021_07_26.html#on-my-wish-list
>
> Why it should be a built-in? Apart from that requirement,
> `Parameters!(mixin(__FUNCTION__))` does the trick. A bit 
> verbose but not much more so than the `__traits(...)` built-ins.

That doesn't do the same thing.

Parameters returns the type of each parameter.

__arguments in the case of OP holds the value of each parameter.

```d
Parameters!(mixin(__FUNCTION__))
```


Ex. for a function like:

```d
void a(int x, int y);
```

It'll actually give you:

```d
(int, int)
```

When really OP wants:

```d
[x, y]
```