why local variables cannot be ref?

[Timon Gehr]

On 25.11.19 10:00, Dukc wrote:
> 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)

This is not true. You can annotate main with @nogc.