final/test/containers/sequences/array/array.size/size.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <array>

// template <class T, size_t N> constexpr size_type array<T,N>::size();

#include <array>
#include <cassert>

int main()
{
    {
        typedef double T;
        typedef std::array<T, 3> C;
        C c = {1, 2, 3.5};
        assert(c.size() == 3);
        assert(c.max_size() == 3);
        assert(!c.empty());
    }
    {
        typedef double T;
        typedef std::array<T, 0> C;
        C c = {};
        assert(c.size() == 0);
        assert(c.max_size() == 0);
        assert(c.empty());
    }
#ifndef _LIBCPP_HAS_NO_CONSTEXPR
    {
        typedef double T;
        typedef std::array<T, 3> C;
        constexpr C c = {1, 2, 3.5};
        static_assert(c.size() == 3, "");
        static_assert(c.max_size() == 3, "");
        static_assert(!c.empty(), "");
    }
    {
        typedef double T;
        typedef std::array<T, 0> C;
        constexpr C c = {};
        static_assert(c.size() == 0, "");
        static_assert(c.max_size() == 0, "");
        static_assert(c.empty(), "");
    }
#endif
}