mirror of https://gitee.com/bigwinds/arangodb
172 lines
3.9 KiB
C++
Executable File
172 lines
3.9 KiB
C++
Executable File
// Copyright Daniel Wallin 2006. Use, modification and distribution is
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// subject to the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/parameter/preprocessor.hpp>
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#include <boost/parameter/name.hpp>
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#include <boost/type_traits/is_convertible.hpp>
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#include <boost/tuple/tuple.hpp>
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#include <string>
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#include "basics.hpp"
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#ifndef BOOST_NO_SFINAE
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# include <boost/utility/enable_if.hpp>
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#endif
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namespace test {
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namespace mpl = boost::mpl;
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using mpl::_;
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using boost::is_convertible;
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BOOST_PARAMETER_NAME(expected)
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BOOST_PARAMETER_NAME(x)
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BOOST_PARAMETER_NAME(y)
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BOOST_PARAMETER_NAME(z)
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// Sun has problems with this syntax:
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//
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// template1< r* ( template2<x> ) >
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//
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// Workaround: factor template2<x> into a separate typedef
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typedef is_convertible<_, int> predicate1;
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typedef is_convertible<_, std::string> predicate2;
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#if BOOST_WORKAROUND(__SUNPRO_CC, BOOST_TESTED_AT(0x580))
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BOOST_PARAMETER_FUNCTION((int), f, tag,
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(required
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(expected, *)
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)
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(deduced
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(required
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(x, *(predicate1))
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(y, *(predicate2))
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)
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)
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)
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#else
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BOOST_PARAMETER_FUNCTION((int), f, tag,
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(required
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(expected, *)
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)
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(deduced
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(required
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(x, *(is_convertible<_, int>))
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(y, *(is_convertible<_, std::string>))
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)
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)
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)
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#endif
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{
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assert(equal(x, boost::tuples::get<0>(expected)));
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assert(equal(y, boost::tuples::get<1>(expected)));
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return 1;
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}
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struct X
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{
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X(int x = -1)
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: x(x)
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{}
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bool operator==(X const& other) const
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{
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return x == other.x;
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}
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int x;
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};
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typedef is_convertible<_, X> predicate3; // SunPro workaround; see above
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BOOST_PARAMETER_FUNCTION((int), g, tag,
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(required
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(expected, *)
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)
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(deduced
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(required
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(x, *(is_convertible<_, int>))
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(y, *(is_convertible<_, std::string>))
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)
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(optional
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(z, *(predicate3), X())
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)
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)
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)
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{
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assert(equal(x, boost::tuples::get<0>(expected)));
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assert(equal(y, boost::tuples::get<1>(expected)));
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assert(equal(z, boost::tuples::get<2>(expected)));
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return 1;
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}
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BOOST_PARAMETER_FUNCTION(
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(int), sfinae, tag,
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(deduced
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(required
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(x, *(predicate2))
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)
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)
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)
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{
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return 1;
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}
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#ifndef BOOST_NO_SFINAE
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// On compilers that actually support SFINAE, add another overload
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// that is an equally good match and can only be in the overload set
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// when the others are not. This tests that the SFINAE is actually
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// working. On all other compilers we're just checking that
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// everything about SFINAE-enabled code will work, except of course
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// the SFINAE.
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template<class A0>
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typename boost::enable_if<boost::is_same<int,A0>, int>::type
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sfinae(A0 const& a0)
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{
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return 0;
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}
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#endif
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} // namespace test
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using boost::make_tuple;
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// make_tuple doesn't work with char arrays.
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char const* str(char const* s)
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{
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return s;
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}
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int main()
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{
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using namespace test;
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f(make_tuple(0, str("foo")), _x = 0, _y = "foo");
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f(make_tuple(0, str("foo")), _x = 0, _y = "foo");
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f(make_tuple(0, str("foo")), 0, "foo");
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f(make_tuple(0, str("foo")), "foo", 0);
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f(make_tuple(0, str("foo")), _y = "foo", 0);
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f(make_tuple(0, str("foo")), _x = 0, "foo");
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f(make_tuple(0, str("foo")), 0, _y = "foo");
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g(make_tuple(0, str("foo"), X()), _x = 0, _y = "foo");
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g(make_tuple(0, str("foo"), X()), 0, "foo");
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g(make_tuple(0, str("foo"), X()), "foo", 0);
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g(make_tuple(0, str("foo"), X()), _y = "foo", 0);
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g(make_tuple(0, str("foo"), X()), _x = 0, "foo");
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g(make_tuple(0, str("foo"), X()), 0, _y = "foo");
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g(make_tuple(0, str("foo"), X(1)), 0, _y = "foo", X(1));
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g(make_tuple(0, str("foo"), X(1)), X(1), 0, _y = "foo");
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#ifndef BOOST_NO_SFINAE
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assert(sfinae("foo") == 1);
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assert(sfinae(0) == 0);
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#endif
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return 0;
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}
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