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https://github.com/boostorg/multiprecision.git
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645fe8865c
Make negating an unsigned int an error, and fix resulting test failures. Change allocator defaults to be void when the allocator is not actually required. [SVN r81070]
117 lines
4.1 KiB
C++
117 lines
4.1 KiB
C++
///////////////////////////////////////////////////////////////
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// Copyright 2012 John Maddock. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_
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//
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// Compare arithmetic results using fixed_int to GMP results.
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//
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#ifdef _MSC_VER
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# define _SCL_SECURE_NO_WARNINGS
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#endif
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#include <boost/multiprecision/cpp_int.hpp>
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#include "test.hpp"
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template <class Number>
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void test()
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{
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using namespace boost::multiprecision;
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typedef Number test_type;
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if(std::numeric_limits<test_type>::is_bounded)
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{
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test_type val = (std::numeric_limits<test_type>::max)();
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BOOST_CHECK_THROW(++val, std::overflow_error);
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val = (std::numeric_limits<test_type>::max)();
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BOOST_CHECK_THROW(test_type(1 + val), std::overflow_error);
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BOOST_CHECK_THROW(test_type(val + 1), std::overflow_error);
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BOOST_CHECK_THROW(test_type(2 * val), std::overflow_error);
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val /= 2;
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val += 1;
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BOOST_CHECK_THROW(test_type(2 * val), std::overflow_error);
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if(std::numeric_limits<test_type>::is_signed)
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{
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val = (std::numeric_limits<test_type>::min)();
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BOOST_CHECK_THROW(--val, std::overflow_error);
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val = (std::numeric_limits<test_type>::min)();
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BOOST_CHECK_THROW(test_type(val - 1), std::overflow_error);
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BOOST_CHECK_THROW(test_type(2 * val), std::overflow_error);
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val /= 2;
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val -= 1;
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BOOST_CHECK_THROW(test_type(2 * val), std::overflow_error);
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}
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else
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{
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val = (std::numeric_limits<test_type>::min)();
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BOOST_CHECK_THROW(--val, std::range_error);
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val = (std::numeric_limits<test_type>::min)();
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BOOST_CHECK_THROW(test_type(val - 1), std::range_error);
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}
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}
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if(std::numeric_limits<test_type>::is_signed)
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{
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test_type a = -1;
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test_type b = 1;
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BOOST_CHECK_THROW(test_type(a | b), std::range_error);
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BOOST_CHECK_THROW(test_type(a & b), std::range_error);
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BOOST_CHECK_THROW(test_type(a ^ b), std::range_error);
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}
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else
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{
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// Constructing from a negative value is not allowed:
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BOOST_CHECK_THROW(test_type(-2), std::range_error);
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BOOST_CHECK_THROW(test_type("-2"), std::range_error);
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}
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if(std::numeric_limits<test_type>::digits < std::numeric_limits<long long>::digits)
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{
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long long llm = (std::numeric_limits<long long>::max)();
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test_type t;
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BOOST_CHECK_THROW(t = llm, std::range_error);
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BOOST_CHECK_THROW(t = static_cast<test_type>(llm), std::range_error);
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unsigned long long ullm = (std::numeric_limits<unsigned long long>::max)();
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BOOST_CHECK_THROW(t = ullm, std::range_error);
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BOOST_CHECK_THROW(t = static_cast<test_type>(ullm), std::range_error);
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static const checked_uint512_t big = (std::numeric_limits<checked_uint512_t>::max)();
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BOOST_CHECK_THROW(t = static_cast<test_type>(big), std::range_error);
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}
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//
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// String errors:
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//
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BOOST_CHECK_THROW(test_type("12A"), std::runtime_error);
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BOOST_CHECK_THROW(test_type("0658"), std::runtime_error);
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if(std::numeric_limits<test_type>::is_signed)
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{
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BOOST_CHECK_THROW(test_type(-2).str(0, std::ios_base::hex), std::runtime_error);
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BOOST_CHECK_THROW(test_type(-2).str(0, std::ios_base::oct), std::runtime_error);
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}
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}
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int main()
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{
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using namespace boost::multiprecision;
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test<number<cpp_int_backend<0, 0, signed_magnitude, checked> > >();
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test<checked_int512_t>();
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test<checked_uint512_t>();
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test<number<cpp_int_backend<32, 32, signed_magnitude, checked, void> > >();
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test<number<cpp_int_backend<32, 32, unsigned_magnitude, checked, void> > >();
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//
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// We also need to test type with "odd" bit counts in order to ensure full code coverage:
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//
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test<number<cpp_int_backend<528, 528, signed_magnitude, checked, void> > >();
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test<number<cpp_int_backend<528, 528, unsigned_magnitude, checked, void> > >();
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test<number<cpp_int_backend<48, 48, signed_magnitude, checked, void> > >();
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test<number<cpp_int_backend<48, 48, unsigned_magnitude, checked, void> > >();
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return boost::report_errors();
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}
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