Resets the state abandoning the results of previous executions. New shared state is constructed.

Equivalent to*this= packaged_task(std::move(f)), wheref is the stored task.

[edit]Parameters

(none)

[edit]Return value

(none)

[edit]Exceptions

• std::future_error if*this has no shared state. The error condition is set tono_state.
• std::bad_alloc if there was not enough memory for a new shared state.
• Any exception thrown by themove constructor of the newpackaged_task.

[edit]Example

#include <cmath>#include <future>#include <iostream>#include <thread> int main(){std::packaged_task<int(int,int)> task([](int a,int b){returnstd::pow(a, b);});std::future<int> result= task.get_future();    task(2,9);std::cout<<"2^9 = "<< result.get()<<'\n';     task.reset();    result= task.get_future();std::thread task_td(std::move(task),2,10);    task_td.join();std::cout<<"2^10 = "<< result.get()<<'\n';}

2^9 = 5122^10 = 1024

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