persons.kt

persons.kt

data class Person(var name: String, var age: Int)

class PersonContainer {
    private val list = arrayListOf<Person>()
    fun add(person: Person) = list.add(person)
    fun get(): List<Person> = list
    infix fun String.with(age: Int) = Person(this, age)
}

fun persons(init: PersonContainer.() -> Unit): List<Person> {
    val bundle = PersonContainer()
    bundle.apply(init)
    return bundle.get()
}

fun PersonContainer.add(block: () -> Person) {
    val holder = block()
    this.add(Person(holder.name, holder.age))
}

fun main() {
    val persons = persons {
        add { "juan" with 42 } 
        add { "peter" with 35 }
    }

    print(persons)
}