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