Somewhat related to okio, so posting here hoping s...

# squarelibraries

[MJegorovas]

Somewhat related to okio, so posting here hoping someone might have any ideas.
I have this kind of code:

fun <T> BufferedSource.forEachBlock(blockSize: Long, operator: Buffer.() -> T): List<T> {
    val result = mutableListOf<T>()
    val blockBuffer = Buffer()
    while (true) {
        request(blockSize)
        if (exhausted()) break
        blockBuffer.write(this, minOf(blockSize, buffer.size))
        result += blockBuffer.operator()
    }
    return result
}

fun main() {
    FileSystem.SYSTEM.read("filePath".toPath()) {
        forEachBlock(4) {
            // do some processing with buffer that might fail, if it happens, I want to exit from whole read operation;
        }
    }
}

Now I would like some way to return from forEachBlock method in case operation inside it fails. return@read can't be used here and return@forEachBlock only returns from iteration and not whole forEachBlock method. Could throw exception, but that seems excessive. Any ideas how it could be done?

[MJegorovas]

Would inline modifier be appropriate here?