Implicit type conversion depending on assignment

[Alexander Zhirov]

On Thursday, 23 March 2023 at 13:38:51 UTC, Alexander Zhirov 
wrote:
> Is it possible to convert such records inside the structure to 
> the assigned type?
>
> ```d
> struct MyVal
> {
>     string value;
>     // Here it would be possible to use an alias to this, but 
> it can only be used 1 time
> }
>
> auto a = MyVal("100");
> auto b = MyVal("11.2");
>
> int MyInt = a;        // Implicitly convert to target type
> float myFloat = b;    // Implicitly convert to target type
> ```

Here is an [example from the 
documentation](https://dlang.org/spec/struct.html#alias-this), 
but for "several" types, for example, with a cast check and a 
return of the default value.