Kotlin DSL documented example doesn't work

[rohitkulshreshtha]

Looking at the example provided in the README.md:

val obj = json {
   repeat(3) {
      put("field$it", it * 2)
   }
}

It throws a java.util.EmptyStackException.

There seems to be no way for me to use put() to make a flat, single level JSON. Something like this:

{
   "a": "b",
   "c": "d"
}

Note, I need to generate the contents procedurally, so working with put() will be better than passing a collection of Pair<String, *>

[Totalus]

Indeed, the examples don't work because the returned value of the json {} function are not valid objects.

The following examples should work.

val obj = json { obj(
  "color" to "red",
  "age" to 23
)}

/*
{
  "color":"red",
  "age":23
}
*/

If you want to populate a nested object:

val obj = json { obj("fields") {
    repeat(3) {
      put("field$it", it * 2)
    }
  }
}

/*
{
  "fields": {
    "field0": 0,
    "field1": 2,
    "field2": 4
  }
}
*/

If you want to populate the root object, it is ugly, but currently seems to be the working option:

val obj = json {
   val o = obj()
   o.repeat(3) {
      put("field$it", it * 2)
   }
   o // Return the object
}

/*
{
    "field0": 0,
    "field1": 2,
    "field2": 4
}
*/