Functional programming with tuples of functions in c++11.
The library contains two main concepts from functional programming implemented in c++11: compositions and batteries, which are implemented using templates (which means that there is little or no overhead compared to tailoring the equivalent functions by hand).
A composition feeds the output from one function to another function, and so on until there are no more functions, and a value is returned.
A battery applies each function in a tuple to a single list of parameters, and returns a corresponding tuple containing the return values.
There is a potential efficiency problem when a battery is called with a heavy object by value. Currently, any parameters that are passed by value are copied for each function call. This is the natural way to solve it, but not necessarily what the programmer wants.
The solution on the drawing board is to introduce a parameter pack wrapper that would assume ownership and of the members, and present itself as a tuple of references to the following automatic unpacking and battery function call.