Usage of custom class with JSONValue

[arturg via Digitalmars-d-learn]

On Thursday, 24 March 2016 at 08:24:46 UTC, Edwin van Leeuwen 
wrote:
> JSONValue only works with the build in types, not with user 
> defined types. Either you define a specific function for the 
> class that returns a JSONValue. Easiest way to do that would be 
> to build an associative array with strings as keys with the 
> names, and JSONValues as values and turn that into JSONValue, 
> i.e. (untested):
> class MyClass
> {
> 	string[] _data;
> 	alias _data this;
> 	// ...
>    JSONValue toJSON()
>   {
>     JSONValue[string] aa;
>     JSONValue[] dataJSON = _data.map!((a) => 
> JSONValue(a)).array;
>     aa["data"] = JSONValue(dataJSON);
>     return JSONValue(aa);
>   }
> }
>

isnt alias this supposed to do this implicitly?

convert this
auto jsValue = JSONValue(new MyClass());

into this
auto jsValue = JSONValue((new MyClass())._data);