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https://github.com/boostorg/safe_numerics.git
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1bc0b94e65
a) made trap_exception work b) updated manual and examples to show how to use library to eliminate runtime penalty c) added in safe_literal d) made corrections of various types
53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
#include <stdexcept>
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#include <iostream>
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#include "../include/safe_range.hpp"
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#include "../include/safe_literal.hpp"
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#include "../include/automatic.hpp"
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#include "../include/exception.hpp"
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#include "safe_format.hpp" // prints out range and value of any type
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using namespace boost::numeric; // for safe_literal
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using safe_t = safe_signed_range<
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-24,
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82,
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automatic,
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trap_exception
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>;
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// define variables use for input
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using input_safe_t = safe_signed_range<
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-24,
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82,
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automatic, // we don't need automatic in this case
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throw_exception // these variables need to
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>;
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// function arguments can never be outside of limits
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auto f(const safe_t & x, const safe_t & y){
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auto z = x + y; // we know that this cannot fail
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std::cout << "z = " << safe_format(z) << std::endl;
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std::cout << "(x + y) = " << safe_format(x + y) << std::endl;
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std::cout << "(x - y) = " << safe_format(x - y) << std::endl;
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return z;
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}
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int main(int argc, const char * argv[]){
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std::cout << "example 83:\n";
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try{
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input_safe_t x, y;
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std::cin >> x >> y; // read varibles, throw exception
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std::cout << "x" << safe_format(x) << std::endl;
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std::cout << "y" << safe_format(y) << std::endl;
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std::cout << "z" << safe_format(f(x, y)) << std::endl;
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}
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catch(const std::exception & e){
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// none of the above should trap. Mark failure if they do
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std::cout << e.what() << std::endl;
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return false;
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}
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return 0;
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}
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