extract-clusters.kt

fun extractGraphemeClusters(input: String): List<String> {
    val characters = mutableListOf<String>()

    val iterator = BreakIterator.getCharacterInstance()
    iterator.setText(input)

    var start = iterator.first()
    var iterated = false
    while (!iterated) {
        val next = iterator.next()
        if (next == BreakIterator.DONE) {
            iterated = true
            continue
        }

        val extracted = input.substring(start, next)

        start = next

        characters += extracted
    }

    return characters
}