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std::suspend_never

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< cpp‎ | coroutine
 
 
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suspend_never
(C++20)
 
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.

Contents

[edit] Member functions

await_ready
(C++20)
indicates that an await expression never suspends
(public member function)
await_suspend
(C++20)
no-op
(public member function)
await_resume
(C++20)
no-op
(public member function)

std::suspend_never::await_ready

constexpr bool await_ready() const noexcept { return true; }
(since C++20)

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

std::suspend_never::await_suspend

constexpr void await_suspend() const noexcept {}
(since C++20)

Does nothing.

std::suspend_never::await_resume

constexpr void await_resume() const noexcept {}
(since C++20)

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

[edit] Example

[edit] See also

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