packaged_task::valid Method
Specifies whether the object has an associated asynchronous state.
bool valid() const;
Return Value
true if the object has an associated asynchronous state; otherwise, false.
Requirements
Header: future
Namespace: std
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Specifies whether the object has an associated asynchronous state.
bool valid() const;
true if the object has an associated asynchronous state; otherwise, false.
Header: future
Namespace: std