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// Copyright (c) 2018 Robert Ramey
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#include <stdexcept>
#include <iostream>
#include <boost/safe_numerics/safe_integer.hpp>
int main(int, const char *[]){
// problem: cannot recover from arithmetic errors
std::cout << "example 7: ";
std::cout << "cannot recover from arithmetic errors" << std::endl;
std::cout << "Not using safe numerics" << std::endl;
try{
// can't do this as it will crash the program with no
// opportunity for recovery - comment out for example
// int x = 1;
// int y = 0;
// std::cout << x / y;
std::cout << "error cannot be handled at runtime!" << std::endl;
}
catch(const std::exception &){
std::cout << "error handled at runtime!" << std::endl;
}
// solution: replace int with safe<int>
std::cout << "Using safe numerics" << std::endl;
try{
using namespace boost::safe_numerics;
const safe<int> x = 1;
const safe<int> y = 0;
std::cout << x / y;
std::cout << "error NOT detected!" << std::endl;
}
catch(const std::exception & e){
std::cout << "error handled at runtime!" << e.what() << std::endl;
}
return 0;
}
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