If the future is the result of a call to std::async that used lazy evaluation, this function returns immediately without waiting. This function may block for longer than
If the future is the result of a call to async that used lazy evaluation, this function returns immediately without waiting. The behavior is undefined if valid () is false before the call
Since C++11, std::future now has both a wait() and a get() method, which will wait until the future has a valid response, with the latter method waiting (blocking) and then
The return type of std::async is std::future<V>, where V is: The call to std::async synchronizes with the call to f, and the completion of f is sequenced before making the shared
The get member function waits (by calling wait ()) until the shared state is ready, then retrieves the value stored in the shared state (if any). Right after calling this function, valid
To opt-in to the future behavior, set `pd.set_option(''future.no_silent_downcasting'', True)` 0 1 1 0 2 2 3 1 dtype: int64 If I understand the warning correctly, the object dtype is
Checks if the future refers to a shared state. This is the case only for futures that were not default-constructed or moved from (i.e. returned by std::promise::get_future (),
Unlike std::future, which is only moveable (so only one instance can refer to any particular asynchronous result), std::shared_future is copyable and multiple shared future

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The global solar container and mobile power station market is experiencing unprecedented growth, with portable and distributed power demand increasing by over 350% in the past three years. Solar container solutions now account for approximately 45% of all new portable solar installations worldwide. North America leads with 42% market share, driven by emergency response needs and construction industry demand. Europe follows with 38% market share, where mobile power stations have provided reliable electricity for events and remote operations. Asia-Pacific represents the fastest-growing region at 55% CAGR, with manufacturing innovations reducing solar container system prices by 25% annually. Emerging markets are adopting solar containers for disaster relief, construction sites, and temporary power, with typical payback periods of 2-4 years. Modern solar container installations now feature integrated systems with 20kW to 200kW capacity at costs below $2.00 per watt for complete portable energy solutions.
Technological advancements are dramatically improving distributed photovoltaic systems and energy storage performance while reducing operational costs for various applications. Next-generation solar containers have increased efficiency from 80% to over 92% in the past decade, while battery storage costs have decreased by 75% since 2010. Advanced energy management systems now optimize power distribution and load management across mobile power stations, increasing operational efficiency by 35% compared to traditional generator systems. Smart monitoring systems provide real-time performance data and remote control capabilities, reducing operational costs by 45%. Battery storage integration allows mobile power solutions to provide 24/7 reliable power and peak shaving optimization, increasing energy availability by 80-95%. These innovations have improved ROI significantly, with solar container projects typically achieving payback in 1-3 years and mobile power stations in 2-4 years depending on usage patterns and fuel cost savings. Recent pricing trends show standard solar containers (20kW-100kW) starting at $40,000 and large mobile power stations (50kW-200kW) from $75,000, with flexible financing options including rental agreements and power purchase arrangements available.