mirror of https://gitee.com/bigwinds/arangodb
38 lines
1.1 KiB
C++
38 lines
1.1 KiB
C++
#include <stdexcept>
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#include <iostream>
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#include <boost/safe_numerics/safe_integer.hpp>
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int main(int, const char *[]){
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// problem: cannot recover from arithmetic errors
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std::cout << "example 7: ";
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std::cout << "cannot recover from arithmetic errors" << std::endl;
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std::cout << "Not using safe numerics" << std::endl;
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try{
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int x = 1;
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int y = 0;
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// can't do this as it will crash the program with no
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// opportunity for recovery - comment out for example
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//std::cout << x / y;
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std::cout << "error NOT detectable!" << std::endl;
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}
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catch(std::exception){
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std::cout << "error detected!" << std::endl;
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}
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// solution: replace int with safe<int>
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std::cout << "Using safe numerics" << std::endl;
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try{
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using namespace boost::safe_numerics;
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safe<int> x = 1;
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safe<int> y = 0;
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std::cout << x / y;
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std::cout << " error NOT detected!" << std::endl;
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}
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catch(std::exception & e){
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std::cout << "error detected:" << e.what() << std::endl;
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}
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return 0;
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}
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