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Simplify and constexperize

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This commit is contained in:
Matt Borland
2023-03-20 15:22:44 -07:00
parent 5284fb7fa8
commit 5a50ec7868
2 changed files with 52 additions and 51 deletions
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41
test/git_issue_430.cpp
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@@ -1,4 +1,5 @@
// Copyright Matt Borland, 2023
// Copyright Matt Borland 2023
// Copyright John Maddock 2023
// Use, modification and distribution are subject to 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)
@@ -6,14 +7,40 @@
// See: https://godbolt.org/z/Ev4ManrsW
#include <boost/math/special_functions/round.hpp>
#define BOOST_TEST_MAIN
#include <boost/test/unit_test.hpp>
#include <cstdint>
#include "math_unit_test.hpp"
double x = 9223372036854775807.0; // can't be represented as double, will have a different value at runtime.
int main()
template <typename Real>
void test_llround_near_boundary()
{
int64_t result = boost::math::llround(x);
CHECK_EQUAL(result, INT64_C(9223372036854775807));
using std::ldexp;
Real boundary = ldexp(static_cast<Real>(1), std::numeric_limits<long long>::digits);
return boost::math::test::report_errors();
Real value;
int i;
for (value = boundary, i = 0; i < 100; value = boost::math::float_next(value), ++i)
{
BOOST_CHECK_THROW(boost::math::llround(value), boost::math::rounding_error);
}
for (value = boost::math::float_prior(boundary), i = 0; i < 1000; value = boost::math::float_prior(value), ++i)
{
BOOST_CHECK_EQUAL(static_cast<Real>(boost::math::llround(value)), boost::math::round(value));
}
for (value = boost::math::float_prior(-boundary), i = 0; i < 100; value = boost::math::float_prior(value), ++i)
{
BOOST_CHECK_THROW(boost::math::llround(value), boost::math::rounding_error);
}
for (value = -boundary, i = 0; i < 1000; value = boost::math::float_next(value), ++i)
{
BOOST_CHECK_EQUAL(static_cast<Real>(boost::math::llround(value)), boost::math::round(value));
}
}
BOOST_AUTO_TEST_CASE( test_main )
{
test_llround_near_boundary<float>();
test_llround_near_boundary<double>();
test_llround_near_boundary<long double>();
}