97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
// Copyright (c) 2018 Robert Ramey
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/safe_numerics/checked_result.hpp>
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#include <boost/safe_numerics/checked_result_operations.hpp>
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#include <boost/safe_numerics/checked_integer.hpp>
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template<class T>
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constexpr bool test_checked_left_shift(
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const T & v1,
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const T & v2,
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char expected_result
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){
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using namespace boost::safe_numerics;
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const T result = v1 << v2;
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switch(expected_result){
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case '.':
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return ! result.exception();
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case '-':
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return safe_numerics_error::negative_overflow_error == result.m_e;
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case '+':
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return safe_numerics_error::positive_overflow_error == result.m_e;
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case '!':
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return safe_numerics_error::range_error == result.m_e;
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case 'n': // n negative_shift
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return safe_numerics_error::negative_shift == result.m_e;
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case 's': // s negative_value_shift
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return safe_numerics_error::negative_value_shift == result.m_e;
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case 'l': // l shift_too_large
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return safe_numerics_error::shift_too_large == result.m_e;
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default:
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assert(false);
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}
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return false;
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}
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#include "test_checked_left_shift.hpp"
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template<typename T, typename First, typename Second>
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struct test_signed_pair {
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static const std::size_t i = First();
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static const std::size_t j = Second();
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// note: is constexpr really required here? compilers disagree!
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constexpr static const bool value = test_checked_left_shift(
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signed_values<T>[i],
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signed_values<T>[j],
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signed_left_shift_results[i][j]
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);
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};
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template<typename T, typename First, typename Second>
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struct test_unsigned_pair {
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static const std::size_t i = First();
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static const std::size_t j = Second();
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// note: is constexpr really required here? compilers disagree!
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constexpr static const bool value = test_checked_left_shift(
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unsigned_values<T>[i],
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unsigned_values<T>[j],
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unsigned_left_shift_results[i][j]
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);
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};
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#include <boost/mp11/algorithm.hpp>
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int main(){
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using namespace boost::mp11;
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static_assert(
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mp_all_of<
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mp_product<
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test_signed_pair,
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signed_test_types,
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signed_value_indices, signed_value_indices
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>,
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mp_to_bool
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>(),
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"all values for all signed types correctly shifted"
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);
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static_assert(
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mp_all_of<
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mp_product<
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test_unsigned_pair,
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unsigned_test_types,
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unsigned_value_indices, unsigned_value_indices
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>,
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mp_to_bool
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>(),
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"all values for all unsigned types correctly shifted"
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);
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return 0;
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}
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