null == "" is true?

[Antonio]

On Tuesday, 19 July 2022 at 16:55:39 UTC, Kagamin wrote:
>
> As I understand, in your scenario there's no difference between 
> null string and empty string, they both work like empty string, 
> and D treats them as empty string. That's what I mean when I 
> said that distinction between null and empty is meaningless.


Sorry Kagamin... I dindn't read this comment and I added a very 
large answer to the next one that has no sense :-p. I miss being 
able to delete answers from the forum :-)

**Yes... I decided to treat the same way internally** for strings.

Previously

*  `DtoVal!(Null, string)( null)` was equivalent to 
`DtoVal!(Null,string)( Null() )`
*  `DtoVal!(Null, Person)( null)` was equivalent to 
`DtoVal!(Null,string)( Null() )`

Currently

* `DtoVal!(Null, string)( null )` is equivalent to 
`DtoVal!(Null,string)( "" )`;
* For other types this will raise a runtime exception:  
`DtoVal!(Null, Person)( null )`.
   * The correct way of is `DtoVal!(Null, Person)( Null() )`

Basically, **`null` is completely useless and out of my code** 
with the exception of strings.


Best regards
Antonio