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std::suspend_always

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< cpp‎ | coroutine
 
 
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suspend_always
(C++20)
 
Defined in header <coroutine>
struct suspend_always;
(since C++20)

suspend_always is an empty class which can be used to indicate that an await expression always suspends and does not produce a value.

Contents

[edit] Member functions

await_ready
(C++20)
indicates that an await expression always suspends
(public member function)
await_suspend
(C++20)
no-op
(public member function)
await_resume
(C++20)
no-op
(public member function)

std::suspend_always::await_ready

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

Always returns false, indicating that an await expression always suspends.

std::suspend_always::await_suspend

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

Does nothing.

std::suspend_always::await_resume

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

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

[edit] Example

[edit] See also

indicates that an await-expression should never suspend
(class) [edit]