31     auto future = ftl::defer([](int x) { return x + 1; }, 99);  in TEST()  local
32     EXPECT_EQ(future.get(), 100);  in TEST()
35     auto future = ftl::yield(42);  in TEST()  local
36     EXPECT_EQ(future.get(), 42);  in TEST()
40     auto future = ftl::yield(std::move(ptr));  in TEST()  local
41     EXPECT_EQ(*future.get(), '!');  in TEST()
44     auto future = ftl::yield(123);  in TEST()  local
45     std::future<char> futures[] = {ftl::yield('a'), ftl::yield('b')};  in TEST()
47     std::future<char> chain = ftl::chain(std::move(future))  in TEST()
74   std::packaged_task<std::future<ByteVector>(ByteVector)> decrement_bytes(  in TEST()
96           .then([](std::future<ByteVector> bytes) { return bytes; })  in TEST()