libs/gil/test/core/point/concepts.cpp

//
// Copyright 2018 Mateusz Loskot <mateusz at loskot dot net>
//
// 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
//
// FIXME: Avoid Clang's flooding of non-disableable warnings like:
// "T does not declare any constructor to initialize its non-modifiable members"
// when compiling with concepts check enabled.
// See https://bugs.llvm.org/show_bug.cgi?id=41759
#if !defined(BOOST_GIL_USE_CONCEPT_CHECK) && !defined(__clang__)
#error Compile with BOOST_GIL_USE_CONCEPT_CHECK defined
#endif
#include <boost/gil/concepts.hpp>
#include <boost/gil/point.hpp>

#include <type_traits>

namespace gil = boost::gil;


template <typename Point>
void test_members()
{
    static_assert(Point::num_dimensions == 2U, "point is not 2D");

    using value_t = typename Point::value_type;
    using coord_t = typename Point::template axis<0>::coord_t;
    static_assert(std::is_same<value_t, coord_t>::value,
                  "point and axis type mismatch");
}

int main()
{
    boost::function_requires<gil::PointNDConcept<gil::point<int>>>();
    boost::function_requires<gil::PointNDConcept<gil::point_t>>();

    boost::function_requires<gil::Point2DConcept<gil::point<int>>>();
    boost::function_requires<gil::Point2DConcept<gil::point_t>>();

    test_members<gil::point<int>>();
    test_members<gil::point_t>();

    // NOTE: point2 is deprecated, available for backward compatibility
    boost::function_requires<gil::PointNDConcept<gil::point2<int>>>();
    boost::function_requires<gil::Point2DConcept<gil::point2<int>>>();
    test_members<gil::point2<int>>();

    return 0;
}
Boost C++ Libraries

libs/gil/test/core/point/concepts.cpp
