std:: suspend_never

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Utilities library
General utilities
Relational operators (deprecated in C++20)
Coroutine support
Coroutine traits
Coroutine handle
No-op coroutines
Trivial awaitables
suspend_never
(C++20)
Range generators
(C++23)
Defined in header <coroutine>
struct suspend_never ;
(since C++20)

suspend_never is an empty class which can be used to indicate that an await expression never suspends and does not produce a value.

Member functions

await_ready
indicates that an await expression never suspends
(public member function)
await_suspend
no-op
(public member function)
await_resume
no-op
(public member function)

std::suspend_never:: await_ready

constexpr bool await_ready ( ) const noexcept { return true ; }

Always returns true , indicating that an await expression never suspends.

std::suspend_never:: await_suspend

constexpr void await_suspend ( std:: coroutine_handle <> ) const noexcept { }

Does nothing.

std::suspend_never:: await_resume

constexpr void await_resume ( ) const noexcept { }

Does nothing. An await expression does not produce a value if suspend_never is used.

Example

See also

indicates that an await-expression should always suspend
(class)