why local variables cannot be ref?

[Dukc]

On Monday, 25 November 2019 at 03:07:08 UTC, Fanda Vacek wrote:
> Is this preferred design pattern?
>
> ```
> int main()
> {
> 	int a = 1;
> 	//ref int b = a; // Error: variable `tst_ref.main.b` only 
> parameters or `foreach` declarations can be `ref`
> 	ref int b() { return a; }
> 	b = 2;
> 	assert(a == 2);
> 	return 0;
> }
> ```
>
> Fanda

It's okay, but I'd prefer an alias, because your snippet uses the 
heap needlessly (it puts variable a into heap to make sure there 
will be no stack corruption if you pass a pointer to function b() 
outside the main() function)