Worst ideas/features in programming languages?

[victoroak]

On Friday, 5 November 2021 at 17:02:05 UTC, Atila Neves wrote:
>
>> - @safe `void` initialization
>
> For what types? It doesn't compile for pointers, for instance, 
> and I don't see why void initialising an int would be unsafe.
>
>> - .init
>
> Because?
>

Well, I can't answer for him but `void` initialization and 
`.init` makes it impossible to have any meaningful constraint on 
a type. And some types may depend on these constraints to 
maintain safety.

```d
import std.stdio;

struct LimitedInt(int min, int max)
{
     @disable this();

     this(int number)
     {
         assert(number >= min);
         assert(number <= max);
         _number = number;
     }

     private int _number;
}

void main() @safe
{
     LimitedInt!(1, 1000) x = void;
     auto y = LimitedInt!(1, 1000).init;
     writeln(x);
     writeln(y);
}
```

It's `@safe` in this example but there's no way to enforce these 
constraints when you have those.