mirror of
https://github.com/boostorg/safe_numerics.git
synced 2026-02-22 15:42:30 +00:00
29cf7f3d12
removed constexpr from exception policies. this eliminates obstacle to gcc compilation which doesn't support constexpr throw unfortunately, all versions of gcc trip compiler fault so gcc not supported for now safe_literal - make this an unsafe type since it doesn't have policies - this might change in the future
117 lines
3.0 KiB
C++
117 lines
3.0 KiB
C++
#include <iostream>
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#include <cassert>
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#include <limits>
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#include "../include/utility.hpp"
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#include "../include/safe_range.hpp"
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template<typename T>
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void display_log(T Max){
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std::cout
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<< "log(" << Max << ") = "
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<< boost::numeric::log(Max) << std::endl;
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}
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bool test_log(){
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using namespace boost::numeric;
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assert(log(127u) == 7); // 7 bits
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assert(log(127u) == 7); // 7 bits
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assert(log(128u) == 8); // 8 bits
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assert(log(129u) == 8); // 8 bits
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assert(log(255u) == 8); // 8 bits
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assert(log(256u) == 9); // 9 bits
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assert(log(127) == 8); // 7 bits + 1 sign bit
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assert(log(128) == 9); // 8 bits + 1 sign bit
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assert(log(129) == 9); // 8 bits + 1 sign bit
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assert(log(255) == 9); // 8 bits + 1 sign bit
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assert(log(256) == 10); // 9 bits + 1 sign bit
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assert(log(-127) == 8); // 7 bits + 1 sign bit
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assert(log(-128) == 8); // 7 bits + 1 sign bit
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assert(log(-129) == 9); // 8 bits + 1 sign bit
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assert(log(-255) == 9); // 8 bits + 1 sign bit
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assert(log(-256) == 9); // 8 bits + 1 sign bit
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return true;
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}
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bool test1(){
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using namespace boost::numeric;
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typedef signed_stored_type<-256, 254> t1;
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safe_signed_range<-128, 127> s1(1);
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safe_signed_range<-256, 254> s2(2);
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typedef safe_unsigned_range<0u, 1000u> t2;
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static_assert(
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std::numeric_limits<t2>::is_signed == false,
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"this range should be unsigned"
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);
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//typedef ::print_type<t2>::type p_t2;
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return true;
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}
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#include "../include/automatic.hpp"
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template <
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std::intmax_t Min,
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std::intmax_t Max
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>
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using safe_t = boost::numeric::safe_signed_range<
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Min,
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Max,
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boost::numeric::automatic,
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boost::numeric::throw_exception
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>;
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bool test2(){
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std::cout << "test1" << std::endl;
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try{
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const safe_t<-64, 63> x(1);
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safe_t<-64, 63> y;
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y = 2;
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std::cout << "x = " << x << std::endl;
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std::cout << "y = " << y << std::endl;
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auto z = x + y;
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std::cout << "x + y = ["
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<< std::numeric_limits<decltype(z)>::min() << ","
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<< std::numeric_limits<decltype(z)>::max() << "] = "
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<< z << std::endl;
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auto z2 = x - y;
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std::cout << "x - y = ["
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<< std::numeric_limits<decltype(z2)>::min() << ","
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<< std::numeric_limits<decltype(z2)>::max() << "] = "
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<< z2 << std::endl;
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short int yi, zi;
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yi = y;
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zi = x + yi;
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}
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catch(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 true;
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}
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int main(){
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//using namespace boost::numeric;
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//safe_signed_literal2<100> one_hundred;
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//one_hundred = 200;
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bool rval =
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test_log() &&
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test1() &&
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test2() /* &&
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test3() &&
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test4()
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*/
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;
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std::cout << (rval ? "success!" : "failure") << std::endl;
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return rval ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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