Modern C++ Programming Cookbook

How it works...

In the example from the previous section, we have defined a named lambda expression, that is, a lambda expression that has its closure assigned to a variable. This variable is then passed as an argument to the std::accumulate() function. This general algorithm takes the begin and the end iterators that define a range, an initial value to accumulate over, and a function that is supposed to accumulate each value in the range to the total. This function takes a first parameter representing the currently accumulated value and a second parameter representing the current value to accumulate to the total, and it returns the new accumulated value. Note that I did not use the term add because this can be used for other things than ...