When using BOOST_TEST_CLOSE_FRACTION with cpp_dec_float and et_off, I get a lot of ambiguous name errors for enable_if and disable_if in multiprecision. It seems as though the same symbols enable_if and disable_if reside in both the namespace boost as well as deeper in the boost::test namespaces.
Is this a known problem? Am I doing something wrong?
No. Do you have a reduced test case? Thanks, John.
Yes. The test case below tests cyl_bessel_j for cpp_dec_float_50 with et_off. In my trunk with VC11 (Visual Studio 2012) with the test case below, I find numerous errors here due to ambiguous names in <boost/multiprecision/number.hpp>. Note that the test uses the *header-only* version of unit_test from Boost.Test. The ambiguity does not arise with the non-header-only version. The names "enable_if" and "disable_if" are ambiguous because they are present in the namespace "boost" as well as in "boost::unit_test::decorator". In addition, there is symbol-injection via a using directive in Boost.Test which, although needed by Boost.Test, seems to cause the ambiguity. Modifying <boost/multiprecision/number.hpp> by replacing enable_if with boost::enable_if, etc. resolves the ambiguity. I don't know the best way to go here. There could be a variety of code-based solutions. We could also make a simple work-around stating to avoid using the header-only test in combination with multiprecision until the issue can be properly resolved. Thank you. Sincerely, Chris. ------------------------------------------------------------------------------ #define BOOST_TEST_MODULE my_test #include <boost/math/special_functions.hpp> #include <boost/multiprecision/cpp_dec_float.hpp> #define BOOST_TEST_MAIN #include <boost/test/included/unit_test.hpp> // Note: header-only Boost.Test #include <boost/test/floating_point_comparison.hpp> BOOST_AUTO_TEST_CASE(my_test) { typedef boost::multiprecision::number<boost::multiprecision::cpp_dec_float<50>, boost::multiprecision::et_off> mp_type; static const mp_type tolerance = std::numeric_limits<mp_type>::epsilon() * 1.0e12; static const mp_type test_value (boost::math::cyl_bessel_j(mp_type(1) / 3, mp_type(12) / 7)); static const mp_type control_value("0.563386078529485398523077867872975885570767812499129930878677"); BOOST_CHECK_CLOSE_FRACTION(test_value, control_value, tolerance); } //'enable_if' : ambiguous symbol // could be 'C:\boost_trunk\boost/utility/enable_if.hpp(36) : boost::enable_if' // or 'C:\boost_trunk\boost/test/tree/decorator.hpp(184) : boost::unit_test::decorator::enable_if'