This inheritance list is sorted roughly, but not completely, alphabetically:

[detail level 123456]

Casync< Func >
Ctask< T, Allocator >::awaiter	Awaiter type for awaiting the result of a task
Cwhen_all_awaitable< T >::awaiter_base
Ccoro_deleter	If the given promise object has an associated coroutine, destroy it
Cgenerator< T >
Cgenerator< T >::iterator
▼Cnoncopyable	Base class with deleted copy constructor and copy assignment operator
Csynchronized_task< Sync, T >::promise_type	Required promise type for coroutines returning a synchronized_task
Cgenerator< T >::promise_type
Ctask< T, Allocator >::promise_type	Required promise type for coroutines returning a task
Cremove_rvalue_reference< T >
Cremove_rvalue_reference< T && >
▼Cstorage_base< T >	Storage class that can either contain a value, an exception, or be empty
▼Cstorage< void >
Cnonvoid_storage< void >
Cstorage< return_type >
▼Cstorage< T >	Storage class that can either contain a value, an exception, or be empty
Cnonvoid_storage< void >
▼Cnonvoid_storage< T >
▼Ctask_promise_storage_base< void >
Ctask_promise_storage< void >
▼Ctask_promise_storage_base< T >
▼Ctask_promise_storage< T >
Csynchronized_task< Sync, T >::promise_type	Required promise type for coroutines returning a synchronized_task
Ctask< T, Allocator >::promise_type	Required promise type for coroutines returning a task
Cstorage_base< return_type >
Cstorage_base< T & >	Storage class that can either contain a reference to a value, an exception, or be empty
Cstorage_base< void >	Storage class that can either an exception, or be empty
Cstorage_base< void >
▼Csuspend_always
Csynchronized_task< Sync, T >::promise_type::final_awaiter	Awaiter returned by final_suspend
Ctask< T, Allocator >::promise_type::final_awaiter	Awaiter returned by final_suspend
Csynchronized_task< Sync, T >	Lazy task that can later be started explicitly, and that notifies another variable (the “sync” object) of its completion
Ctask< T, Allocator >	Task that produces a value of type `T`: to get that value, simply await the task
Cvoid_type
Cwhen_all_awaitable< T >
Cwhen_all_sync