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152
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1 // { dg-options "-std=gnu++17" }
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2 // { dg-do compile { target c++17 } }
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3
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4 // Copyright (C) 2011-2020 Free Software Foundation, Inc.
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5 //
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6 // This file is part of the GNU ISO C++ Library. This library is free
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7 // software; you can redistribute it and/or modify it under the
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8 // terms of the GNU General Public License as published by the
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9 // Free Software Foundation; either version 3, or (at your option)
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10 // any later version.
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11
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12 // This library is distributed in the hope that it will be useful,
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13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 // GNU General Public License for more details.
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16
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17 // You should have received a copy of the GNU General Public License along
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18 // with this library; see the file COPYING3. If not see
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19 // <http://www.gnu.org/licenses/>.
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20
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21 #include <array>
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22
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23 #ifndef __cpp_lib_array_constexpr
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24 # error "Feature test macro for array constexpr is missing in <array>"
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25 #elif __cpp_lib_array_constexpr < 201603L
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26 # error "Feature test macro for array constexpr has wrong value in <array>"
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27 #endif
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28
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29 constexpr std::size_t test01()
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30 {
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31 // array
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32 typedef std::array<std::size_t, 6> array_type;
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33 array_type a = { { 0, 55, 66, 99, 4115, 2 } };
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34 auto v1 = a[1];
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35 auto v2 = a.at(2);
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36 auto v3 = a.front();
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37 auto v4 = a.back();
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38 return v1 + v2 + v3 + v4;
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39 }
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40
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41 static_assert( test01() == (55 + 66 + 0 + 2) );
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42
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43 constexpr std::size_t test02()
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44 {
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45 // array
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46 typedef std::array<std::size_t, 6> array_type;
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47 const array_type a = { { 0, 55, 66, 99, 4115, 2 } };
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48 auto v1 = a[1];
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49 auto v2 = a.at(2);
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50 auto v3 = a.front();
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51 auto v4 = a.back();
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52 return v1 + v2 + v3 + v4;
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53 }
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54
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55 static_assert( test02() == (55 + 66 + 0 + 2) );
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