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// Copyright David Abrahams, Daniel Wallin 2003.
// 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/parameter/config.hpp>
#if (BOOST_PARAMETER_MAX_ARITY < 2)
#error Define BOOST_PARAMETER_MAX_ARITY as 2 or greater.
#endif
#if !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
#if (BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY < 3)
#error Define BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY \
as 3 or greater.
#endif
#endif
#include <boost/parameter/name.hpp>
namespace test {
BOOST_PARAMETER_NAME((name, keywords) in(name))
BOOST_PARAMETER_NAME((value, keywords) in(value))
} // namespace test
#if defined(BOOST_PARAMETER_CAN_USE_MP11)
#include <type_traits>
#else
#include <boost/mpl/bool.hpp>
#include <boost/mpl/if.hpp>
#include <boost/type_traits/is_convertible.hpp>
#endif
namespace test {
template <typename To>
struct f_predicate
{
template <typename From, typename Args>
#if defined(BOOST_PARAMETER_CAN_USE_MP11)
using fn = std::is_convertible<From,To>;
#else
struct apply
: boost::mpl::if_<
boost::is_convertible<From,To>
, boost::mpl::true_
, boost::mpl::false_
>
{
};
#endif
};
} // namespace test
#include <boost/parameter/parameters.hpp>
#include <boost/parameter/optional.hpp>
#include <string>
namespace test {
struct f_parameters
: boost::parameter::parameters<
boost::parameter::optional<
test::keywords::name
, test::f_predicate<std::string>
>
, boost::parameter::optional<
test::keywords::value
, test::f_predicate<float>
>
>
{
};
} // namespace test
#include <boost/core/lightweight_test.hpp>
namespace test {
// The use of assert_equal_string is just a nasty workaround for a
// vc++ 6 ICE.
void assert_equal_string(std::string x, std::string y)
{
BOOST_TEST(x == y);
}
template <typename P>
void f_impl(P const& p)
{
float v = p[test::value | 3.f];
BOOST_TEST_EQ(v, 3.f);
test::assert_equal_string(p[test::name | "bar"], "foo");
}
void f()
{
test::f_impl(f_parameters()());
}
} // namespace test
#include <boost/parameter/match.hpp>
namespace test {
template <typename A0>
void
f(
A0 const& a0
, BOOST_PARAMETER_MATCH(f_parameters, (A0), args)
)
{
test::f_impl(args(a0));
}
template <typename A0, typename A1>
void
f(
A0 const& a0
, A1 const& a1
, BOOST_PARAMETER_MATCH(f_parameters, (A0)(A1), args)
)
{
test::f_impl(args(a0, a1));
}
} // namespace test
#if !defined(BOOST_NO_SFINAE) && \
!BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x592))
#include <boost/core/enable_if.hpp>
#if !defined(BOOST_PARAMETER_CAN_USE_MP11)
#include <boost/type_traits/is_same.hpp>
#endif
namespace test {
// On compilers that actually support SFINAE, add another overload that is
// an equally good match and can only be in the overload set when the
// others are not. This tests that the SFINAE is actually working. On
// all other compilers we're just checking that everything about
// SFINAE-enabled code will work, except of course the SFINAE.
template <typename A0, typename A1>
typename boost::enable_if<
#if defined(BOOST_PARAMETER_CAN_USE_MP11)
std::is_same<int,A0>
#else
typename boost::mpl::if_<
boost::is_same<int,A0>
, boost::mpl::true_
, boost::mpl::false_
>::type
#endif
, int
>::type
f(A0 const& a0, A1 const& a1)
{
return 0;
}
} // namespace test
#endif // SFINAE enabled, no Borland workarounds needed.
int main()
{
test::f("foo");
test::f("foo", 3.f);
test::f(test::value = 3.f, test::name = "foo");
#if !defined(BOOST_NO_SFINAE) && \
!BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x592))
BOOST_TEST_EQ(0, test::f(3, 4));
#endif
return boost::report_errors();
}
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