I can't believe this !!

[Rikki Cattermole via Digitalmars-d-learn]

On 14/11/15 7:30 PM, MesmerizedInTheMorning wrote:
> https://issues.dlang.org/show_bug.cgi?id=15331
>
> but it's true !
>
> There's **nothing** to check the availability of a Key. At least I would
> expect opIndex[string key] to return a JSONValue with .type ==
> JSON_TYPE.NULL, but no...
>
> Also If it was returning a JSONValue* it would be easyer to check if a
> key is present.
>
> God damn it, how could you miss this design flaw when std.json was
> reviewed ?!

in overload was introduced to JsonValue in 2.066.0 and it is still there.

https://github.com/D-Programming-Language/dlang.org/blob/cbb94142ac52e9c57648b10708aedfa55711fe47/changelog/2.066.0.dd#L1042

As per the unittest:

     ///
     unittest
     {
         JSONValue j = [ "language": "D", "author": "walter" ];
         string a = ("author" in j).str;
     }

https://github.com/D-Programming-Language/phobos/blob/master/std/json.d#L538