I'm using GSON to get some simple value, which can...

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[reza.shah]

I'm using GSON to get some simple value, which can be converted to int, double, string, etc.
And i tried to make the function generic.
Below is my codes, the 'when' part is something i would like to do in kotlin.

But i don't know how to use the subtype T in 'when'.

inline fun <reified T> optionalScalarValue(jsonObject: JsonObject, field: String): T? {
        val element = jsonObject.get(field)

        when(T) {
            is Double -> return element.asDouble
        }
    }