31     auto future = ftl::defer([](int x) { return x + 1; }, 99);  in TEST()
35     auto future = ftl::yield(42);  in TEST()
40     auto future = ftl::yield(std::move(ptr));  in TEST()
44     auto future = ftl::yield(123);  in TEST()
45     ftl::Future<char> futures[] = {ftl::yield('a'), ftl::yield('b')};  in TEST()
47     ftl::Future<char> chain = ftl::Future(std::move(future))  in TEST()
74   std::packaged_task<ftl::Future<ByteVector>(ByteVector)> decrement_bytes(  in TEST()
75       [](ByteVector bytes) { return ftl::defer(decrement, std::move(bytes)); });  in TEST()
84       ftl::Future(std::move(fetch))  in TEST()
96           .then([](ftl::Future<ByteVector> bytes) { return bytes; })  in TEST()
108     auto future = ftl::yield(42);  in TEST()
126     auto get_future = ftl::Future(get_int.get_future());  in TEST()