tmc::spawn_tuple()

tmc::spawn_tuple() produces an awaitable that supports HALO when used with Clang 20+ via the [[clang::coro_await_elidable_argument]] attribute.

For HALO to work, spawn_tuple() must be awaited directly as a prvalue in a co_await expression. Storing the result in a variable before awaiting prevents HALO from being applied.

// HALO: spawn_tuple() is directly awaited
auto results = co_await tmc::spawn_tuple(task_int(1), task_int(2));

// Non-HALO: spawn_tuple() stored in variable
auto spawned = tmc::spawn_tuple(task_int(3), task_int(4));
auto results = co_await std::move(spawned);

// Non-HALO: spawn_tuple() with run_on() customization - due to member
// function call, this cannot be elided
auto results = co_await tmc::spawn_tuple(task_int(3), task_int(4))
                 .run_on(tmc::current_executor());

Main Documentation

For full documentation on tmc::spawn_tuple(), see tmc::spawn_tuple().