gistfile1.cpp

case Opcode::Send: {
    ++instructionPointer();
    auto channel = pop();
    auto value = pop();
    dynamic_cast<Channel&>(*channel).send([=] {
        scheduledFibers.push(&fiber);
        return value;
    });
    return;
}

case Opcode::Receive: {
    ++instructionPointer();
    auto channel = pop();
    dynamic_cast<Channel&>(*channel).receive([=] (GCPtr<> object) {
        fiber.evaluationStack.push_back(std::move(object));
        scheduledFibers.push(&fiber);
    });
    return;
}