Kotlin Json Dsl idea

JsonDsl.kt

package com.example

import kotlinx.serialization.json.*
import org.junit.Assert.assertEquals
import org.junit.Test

class JsonDslTest {

    @Test
    fun `declare complex object`() {
        val json = jsonObject {
            "booleanKey" += true
            "arrayKey" += 1..10
            "objectKey" += jsonObject {
                "stringKey" += "stringValue"
            }
            "objectArray" += arrayOf(jsonObject {
                "intKey" += 123
            })
        }

        assertEquals(
            """{"booleanKey":true,"arrayKey":[1,2,3,4,5,6,7,8,9,10],"objectKey":{"stringKey":"stringValue"},"objectArray":[{"intKey":123}]}""",
            json.toString()
        )
    }

}

fun jsonObject(function: Builder.() -> Unit): JsonObject = buildJsonObject {
    Builder(this).apply(function)
}.jsonObject

class Builder(val builder: JsonObjectBuilder) {

    infix operator fun String.plusAssign(value: Boolean) {
        builder.put(this, value)
    }

    infix operator fun String.plusAssign(value: Number) {
        builder.put(this, value)
    }

    infix operator fun String.plusAssign(value: String) {
        builder.put(this, value)
    }

    infix operator fun String.plusAssign(value: JsonObject) {
        builder.put(this, value)
    }

    infix operator fun String.plusAssign(value: Array<Boolean>) {
        builder.put(this, buildJsonArray {
            value.forEach {
                this.add(it)
            }
        })
    }

    infix operator fun String.plusAssign(value: Iterable<Number>) {
        builder.put(this, buildJsonArray {
            value.forEach {
                this.add(it)
            }
        })
    }

    infix operator fun String.plusAssign(value: Array<String>) {
        builder.put(this, buildJsonArray {
            value.forEach {
                this.add(it)
            }
        })
    }

    infix operator fun String.plusAssign(value: Array<JsonObject>) {
        builder.put(this, buildJsonArray {
            value.forEach {
                this.add(it)
            }
        })
    }
}