92 lines
2.6 KiB
C++
92 lines
2.6 KiB
C++
// Copyright (c) 2012 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 <boost/safe_numerics/checked_result.hpp>
|
|
#include <boost/safe_numerics/checked_result_operations.hpp>
|
|
#include <boost/safe_numerics/checked_integer.hpp>
|
|
|
|
// note: T should be of tyme checked_result<R> for some integer type R
|
|
template<class T>
|
|
constexpr bool test_checked_add(
|
|
const T & v1,
|
|
const T & v2,
|
|
char expected_result
|
|
){
|
|
using namespace boost::safe_numerics;
|
|
const T result = v1 + v2;
|
|
switch(expected_result){
|
|
case '.':
|
|
return ! result.exception();
|
|
case '-':
|
|
return safe_numerics_error::negative_overflow_error == result.m_e;
|
|
case '+':
|
|
return safe_numerics_error::positive_overflow_error == result.m_e;
|
|
case '!':
|
|
return safe_numerics_error::range_error == result.m_e;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
#include "test_checked_add.hpp"
|
|
|
|
template<typename T, typename First, typename Second>
|
|
struct test_signed_pair {
|
|
static const std::size_t i = First();
|
|
static const std::size_t j = Second();
|
|
// note: is constexpr really required here? compilers disagree!
|
|
constexpr static const bool value = test_checked_add(
|
|
signed_values<T>[i],
|
|
signed_values<T>[j],
|
|
signed_addition_results[i][j]
|
|
);
|
|
};
|
|
|
|
template<typename T, typename First, typename Second>
|
|
struct test_unsigned_pair {
|
|
static const std::size_t i = First();
|
|
static const std::size_t j = Second();
|
|
// note: is constexpr really required here? compilers disagree!
|
|
constexpr static const bool value = test_checked_add(
|
|
unsigned_values<T>[i],
|
|
unsigned_values<T>[j],
|
|
unsigned_addition_results[i][j]
|
|
);
|
|
};
|
|
|
|
#include "check_symmetry.hpp"
|
|
#include <boost/mp11/algorithm.hpp>
|
|
|
|
int main(){
|
|
using namespace boost::mp11;
|
|
check_symmetry(signed_addition_results);
|
|
check_symmetry(unsigned_addition_results);
|
|
|
|
static_assert(
|
|
mp_all_of<
|
|
mp_product<
|
|
test_signed_pair,
|
|
signed_test_types,
|
|
signed_value_indices, signed_value_indices
|
|
>,
|
|
mp_to_bool
|
|
>(),
|
|
"all values for all signed types correctly added"
|
|
);
|
|
|
|
static_assert(
|
|
mp_all_of<
|
|
mp_product<
|
|
test_unsigned_pair,
|
|
unsigned_test_types,
|
|
unsigned_value_indices, unsigned_value_indices
|
|
>,
|
|
mp_to_bool
|
|
>(),
|
|
"all values for all unsigned types correctly added"
|
|
);
|
|
return 0;
|
|
}
|