61 lines
2.1 KiB
C++
61 lines
2.1 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Copyright 2016 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_0.txt)
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#include <boost/multiprecision/cpp_int.hpp>
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#include <boost/multiprecision/cpp_dec_float.hpp>
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#include <boost/multiprecision/cpp_bin_float.hpp>
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boost::multiprecision::cpp_rational rationalfromStr(const char* str)
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{
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boost::multiprecision::cpp_dec_float_50 d1(str);
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boost::multiprecision::cpp_rational result(d1); // <--- eats CPU forever
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return result;
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}
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boost::multiprecision::cpp_rational rationalfromStr2(const char* str)
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{
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boost::multiprecision::cpp_bin_float_50 d1(str);
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boost::multiprecision::cpp_rational result(d1); // <--- eats CPU forever
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return result;
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}
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int main()
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{
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// This example is OK.
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{
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boost::multiprecision::cpp_rational expected = 1;
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BOOST_ASSERT(expected == rationalfromStr("1"));
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}
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// This example is OK.
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{
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boost::multiprecision::cpp_rational expected = boost::multiprecision::cpp_rational(25) / boost::multiprecision::cpp_rational(10);
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BOOST_ASSERT(expected == rationalfromStr("2.5"));
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}
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// This example is OK.
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{
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boost::multiprecision::cpp_rational expected = boost::multiprecision::cpp_rational(5) / boost::multiprecision::cpp_rational(1000);
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BOOST_ASSERT(expected == rationalfromStr("0.005"));
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}
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// This example is OK.
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{
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boost::multiprecision::cpp_rational expected = 0;
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BOOST_ASSERT(expected == boost::multiprecision::cpp_rational("0")); // direct cpp_rational from str is OK.
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}
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// This example fails.
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{
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boost::multiprecision::cpp_rational expected = 0;
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// reachable code
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BOOST_ASSERT(expected == rationalfromStr("0")); // cpp_rational from cpp_dec_float_50 is not OK.
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// unreachable code
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}
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{
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boost::multiprecision::cpp_rational expected = 0;
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// reacheble code
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BOOST_ASSERT(expected == rationalfromStr2("0")); // cpp_rational from cpp_dec_float_50 is not OK.
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// unreachable code
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}
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return 0;
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}
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