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c++: Explain fn template argument type/value mismatches [PR66439]
[thirdparty/gcc.git] / libstdc++-v3 / testsuite / 20_util / tuple / element_access / get_neg.cc
1 // Copyright (C) 2016-2020 Free Software Foundation, Inc.
2 //
3 // This file is part of the GNU ISO C++ Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
7 // any later version.
8
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
13
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3. If not see
16 // <http://www.gnu.org/licenses/>.
17
18 // { dg-options "-fno-show-column" }
19 // { dg-do compile { target c++14 } }
20 // { dg-prune-output "tuple index is in range" }
21
22 #include <tuple>
23
24 void
25 test01()
26 {
27 using test_type = std::tuple<>;
28 test_type t;
29 std::get<0>(t); // { dg-error "no match" }
30 std::get<0>(const_cast<const test_type&>(t)); // { dg-error "no match" }
31 std::get<0>(static_cast<test_type&&>(t)); // { dg-error "no match" }
32 std::get<5>(t); // { dg-error "no match" }
33 std::get<5>(const_cast<const test_type&>(t)); // { dg-error "no match" }
34 std::get<5>(static_cast<test_type&&>(t)); // { dg-error "no match" }
35 }
36
37 void
38 test02()
39 {
40 using test_type = std::tuple<int>;
41 test_type t;
42 std::get<1>(t); // { dg-error "no match" }
43 std::get<1>(const_cast<const test_type&>(t)); // { dg-error "no match" }
44 std::get<1>(static_cast<test_type&&>(t)); // { dg-error "no match" }
45 std::get<5>(t); // { dg-error "no match" }
46 std::get<5>(const_cast<const test_type&>(t)); // { dg-error "no match" }
47 std::get<5>(static_cast<test_type&&>(t)); // { dg-error "no match" }
48 }
49
50 void
51 test03()
52 {
53 using test_type = std::tuple<int, int, int, int>;
54 test_type t;
55 std::get<5>(t); // { dg-error "no match" }
56 std::get<5>(const_cast<const test_type&>(t)); // { dg-error "no match" }
57 std::get<5>(static_cast<test_type&&>(t)); // { dg-error "no match" }
58 std::get<6>(t); // { dg-error "no match" }
59 std::get<6>(const_cast<const test_type&>(t)); // { dg-error "no match" }
60 std::get<6>(static_cast<test_type&&>(t)); // { dg-error "no match" }
61 }
62
63 // { dg-prune-output "no type named .type" }
64 // { dg-prune-output "type/value mismatch" }