struct Adder : ISupplier<double, double, double>, IFunctional<Func<double, double, double>>, ISupplier<float, float, float>, IFunctional<Func<float, float, float>>, ISupplier<IntPtr, IntPtr, IntPtr>, IFunctional<Func<IntPtr, IntPtr, IntPtr>>, ISupplier<int, int, int>, IFunctional<Func<int, int, int>>, ISupplier<long, long, long>, IFunctional<Func<long, long, long>>, ISupplier<uint, uint, uint>, IFunctional<Func<uint, uint, uint>>, ISupplier<ulong, ulong, ulong>, IFunctional<Func<ulong, ulong, ulong>>