Declaring a reusable formula and using it in other scopes.

[Basile B.]

On Saturday, 12 February 2022 at 12:36:06 UTC, BoQsc wrote:
> `bool nextArgumentDoesNotReachEndOfArray = i + 1 < args.length;`
>
> How can I declare it out of scope and reuse it in any scope 
> that has `i` and `args.length` declared?

Here is an ugly solution, just to encourage someone else to post 
better:

```d
enum n = "i+1<args.length";

void main()
{
     int i;
     string[] args;
     assert(!mixin(n));
     args.length += 2;
     assert(mixin(n));
     testOtherScope();
}

void testOtherScope()
{
     int i;
     string[] args;
     assert(!mixin(n));
     args.length += 2;
     assert(mixin(n));
}
```

The problem with that solution is that it's not clean.
The problem of the initial problem is to have automatic capture 
of `i` and `args` in any scope...

Lost cause ?