Let me summarize the takeaway points:

• The concurrency support library offers high-level components that enable the execution of several tasks concurrently
• Future objects let the caller thread retrieve the output of the asynchronous function 
• The promise object is used by the asynchronous function to set the output or exception
• The type of FUTURE and PROMISE object must be the same as the type of the value set by the asynchronous function
• Concurrent components can be used in combination with the C++ thread support library seamlessly
• The lambda function and expression can be used with the concurrency support library