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be58e01d | 1 | // { dg-do compile { target c++14 } } |
93ba1539 | 2 | |
fbd26352 | 3 | // Copyright (C) 2014-2019 Free Software Foundation, Inc. |
93ba1539 | 4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
8 | // Free Software Foundation; either version 3, or (at your option) | |
9 | // any later version. | |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
16 | // You should have received a copy of the GNU General Public License along | |
17 | // with this library; see the file COPYING3. If not see | |
18 | // <http://www.gnu.org/licenses/>. | |
19 | ||
20 | #include <tuple> | |
21 | ||
05db6daa | 22 | #ifndef __cpp_lib_tuple_element_t |
23 | # error "Feature-test macro for tuple_element_t missing" | |
24 | #elif __cpp_lib_tuple_element_t != 201402 | |
25 | # error "Feature-test macro for tuple_element_t has wrong value" | |
26 | #endif | |
27 | ||
93ba1539 | 28 | using namespace std; |
29 | ||
30 | struct foo | |
31 | { }; | |
32 | ||
33 | int | |
34 | main() | |
35 | { | |
36 | // As foo isn't constructible from anything else, this | |
37 | // lets us check if the alias is returning foo when it should | |
38 | foo q1; | |
39 | tuple_element_t<0,tuple<foo,void,int> > q2(q1); | |
40 | tuple_element_t<2,tuple<void,int,foo> > q3(q1); | |
1db1b56c | 41 | tuple_element_t<0,const tuple<foo,void,int> > q4(q1); |
42 | tuple_element_t<2,const tuple<void,int,foo> > q5(q1); | |
43 | tuple_element_t<0,volatile tuple<foo,void,int> > q6(q1); | |
44 | tuple_element_t<2,volatile tuple<void,int,foo> > q7(q1); | |
45 | tuple_element_t<0,const volatile tuple<foo,void,int> > q8(q1); | |
46 | tuple_element_t<2,const volatile tuple<void,int,foo> > q9(q1); | |
93ba1539 | 47 | } |