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Make C++11 fusion::vector more consistent with C++03 fusion::vector

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- Construct from elements is enabled iff each argument is_convertible to
    corresponding element.
  - Construct from sequence is enabled iff the single argument is a fusion
    sequence.
  - C++11 vector and tuple also disable construct from sequence that are
    shorter than the destination. C++03 gives incorrect is_convertible
    responses in this situation and fails to compile if that constructor is
    used; C++11 can have instantation errors in
    and_<is_convertible<U, T>...> without the additional check.
  - C++11 tuple and vector support truncation conversion and assignment like
    all other sequences.
This commit is contained in:
Lee Clagett
2016-08-21 16:59:04 -04:00
parent 55150a7fa6
commit 5906d9c316
22 changed files with 1504 additions and 283 deletions
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74
test/sequence/copy.hpp
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@ -5,6 +5,8 @@
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 <string>
#include <boost/detail/lightweight_test.hpp>
#include <boost/fusion/sequence/intrinsic/at.hpp>
#include <boost/fusion/mpl.hpp>
@ -15,6 +17,8 @@
#include <boost/mpl/equal.hpp>
#include <boost/static_assert.hpp>
#include "fixture.hpp"
#if !defined(FUSION_AT)
#define FUSION_AT at_c
#endif
@ -36,12 +40,6 @@ namespace test_detail
struct DD { operator CC() const { return CC(); }; };
}
boost::fusion::FUSION_SEQUENCE<double, double, double, double>
foo(int i)
{
return boost::fusion::FUSION_MAKE(i, i+1, i+2, i+3);
}
void test_mpl()
{
using namespace boost::fusion;
@ -60,6 +58,7 @@ void test_mpl()
BOOST_STATIC_ASSERT(equal::value);
}
template <template <typename> class Scenario>
void
test()
{
@ -77,6 +76,9 @@ test()
BOOST_TEST((double)FUSION_AT<0>(t1) == FUSION_AT<0>(t3));
BOOST_TEST(FUSION_AT<1>(t1) == FUSION_AT<1>(t3)[0]);
BOOST_TEST(FUSION_AT<0>(t1) == 4);
BOOST_TEST(FUSION_AT<1>(t1) == 'a');
// testing copy and assignment with implicit conversions
// between elements testing tie
@ -91,8 +93,62 @@ test()
BOOST_TEST(c=='a');
BOOST_TEST(d>5.4 && d<5.6);
// returning a tuple with conversion
foo(2);
test_mpl();
BOOST_TEST((run< Scenario< FUSION_SEQUENCE<> > >(FUSION_SEQUENCE<>())));
BOOST_TEST((
run< Scenario< FUSION_SEQUENCE<int> > >(FUSION_SEQUENCE<int>(500))
));
BOOST_TEST((
run< Scenario< FUSION_SEQUENCE<convertible> > >(
FUSION_SEQUENCE<int>(500)
)
));
BOOST_TEST((
run< Scenario< FUSION_SEQUENCE<int> > >(
FUSION_SEQUENCE<int, int>(500, 100)
, FUSION_SEQUENCE<int>(500)
)
));
BOOST_TEST((
run< Scenario< FUSION_SEQUENCE<convertible> > >(
FUSION_SEQUENCE<int, int>(500, 100)
, FUSION_SEQUENCE<convertible>(500)
)
));
BOOST_TEST((
run< Scenario< FUSION_SEQUENCE<int, int> > >(
FUSION_SEQUENCE<int, int>(500, 600)
)
));
BOOST_TEST((
run< Scenario< FUSION_SEQUENCE<convertible, int> > >(
FUSION_SEQUENCE<convertible, int>(100, 500)
)
));
BOOST_TEST((
run< Scenario< FUSION_SEQUENCE<int, convertible> > >(
FUSION_SEQUENCE<int, convertible>(500, 600)
)
));
BOOST_TEST((
run< Scenario< FUSION_SEQUENCE<convertible, convertible> > >(
FUSION_SEQUENCE<int, int>(400, 500)
)
));
BOOST_TEST((
run< Scenario< FUSION_SEQUENCE<int, int> > >(
FUSION_SEQUENCE<int, int, int>(500, 100, 323)
, FUSION_SEQUENCE<int, int>(500, 100)
)
));
BOOST_TEST((
run< Scenario< FUSION_SEQUENCE<convertible, convertible> > >(
FUSION_SEQUENCE<int, int, int>(500, 600, 100)
, FUSION_SEQUENCE<convertible, convertible>(500, 600)
)
));
}