This is a C++ (standard) header for unsigned big number arithmetic.
It is implemented as a "lifter" from an underlying arithmetic type.
For example, lifter<uint64_t> represents a 128-bit unsigned type.
To create a larger type, use the template multiple times.
To use, simply include lifter.h in your file;
no need to build or compile separately.
For an example, refer to the .cpp file.
The class is defined as:
template <class U>
struct lifter
{
U lo, hi;
};