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// Copyright 2012, Matthias Andreas Benkard.
//
// This program is free software: you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see
// <http://www.gnu.org/licenses/>.
#include "cells.hpp"
#include <cstdlib>
#include <memory>
#include <iostream>
struct unit { };
using namespace cells;
using std::cout;
using std::endl;
typedef formula_cell<double> fcell;
typedef formula_cell<unit> ucell;
int main(int argc, char** argv) {
fcell x0, x1, x2, y, z;
ucell a, b;
with_transaction([&](){
x0.reset(10);
x1.reset([&](){ return *x0 + 5; });
x2.reset([&](){ return *x0 * 2; });
y.reset([&](){ return *x1 * *x2; });
z.reset([&](){ return *x0 * *y; });
a.reset([&]() -> unit { cout << "z is now " << *z << "." << endl; return unit(); });
b.reset([&]() -> unit { cout << "x2 is now " << *x2 << "." << endl; return unit(); });
});
x0.reset(15);
x0.reset(-20);
y.reset(-3);
x1.reset([&]() { return (double)*x0; });
y.reset([&]() { return *x1 + *x2; });
return EXIT_SUCCESS;
}
/*
* z
* |\
* | \
* | \
* | \
* | \
* | \
* | \
* | y
* | /|
* | / |
* | / |
* | x1 x2
* | / |
* | / |
* x0------+
*/
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