Kotlin list merge example

scratch.kt

if (defines[macroName]?.body?.isNotEmpty() == true) {
    val mergedList = mutableListOf<Pair<IElementType?, String?>>()
    for (tokenInfo in defines[macroName]?.body.orEmpty()) {
        val tokenType = tokenInfo.first
        val tokenName = tokenInfo.second
        when (tokenType) {
            CD_TICK_TICK -> {
                val lastToken = mergedList.last()
                mergedList.remove(lastToken)
                val nextToken = defines[macroName]?.body?.iterator()?.next()
                val mergedString = lastToken.second + (nextToken?.second ?: "")
                val mergedPair = Pair<IElementType?, String?>(lastToken.first, mergedString)
                mergedList.add(mergedPair)
            }
            else -> {
                mergedList.add(tokenInfo)
            }
        }
    }
}