rxcpp-teaser.cpp

auto progressbar = rx::observable<>::from(
  rxcpp::interval(std::chrono::milliseconds(250))
    .take_until([](auto x) { return x > 100; })
    .map([](auto x) { return x / 100.0;})
    .map(Progressbar);

auto app = rx::observable<>::zipWith(
  rx::observable<>::just<Text>("progressbar example"),
  progressbar,
  stackLayout);

app.scan(
  VirtualTerminal(), 
  [](auto const& vt, Component const& c) {
    return vt.flip(renderToTerm(vt, TerminalWidth, c)));
  });