#include "tensorstore/util/future.h"
template <typename... U>
  requires (!std::is_const_v<T>) &&
           std::is_constructible_v<result_type, U...>
bool tensorstore::Promise<T>::SetResult(U&&... u) const noexcept;

Sets the result if it has not already been set.

The arguments are forwarded to the result_type constructor. :returns: true if the result was not already set.