ch08.h

// Copyright (c) 2014 Alexander A. Stepanov and Daniel E. Rose
//
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without
// fee, provided that the above copyright notice appear in all copies
// and that both that copyright notice and this permission notice
// appear in supporting documentation. The authors make no
// representations about the suitability of this software for any
// purpose. It is provided "as is" without express or implied
// warranty.
//
// This code accompanies the "fM2GP" book:
//
//	From Mathematics to Generic Programming
//	by Alexander Stepanov and Daniel E. Rose
//	Addison-Wesley Professional, 2015
//
// -------------------------------------------------------------------
// ch08.h -- Functions from Chapter 8 of fM2GP.
// -------------------------------------------------------------------

#define InputIterator typename
#define Semiring typename

// Section 8.1

template <InputIterator I, Semiring R>
R polynomial_value(I first, I last, R x) {
    if (first == last) return R(0);
    R sum(*first);
    while (++first != last) {
        sum *= x;
        sum += *first;
    }
    return sum;
}