| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
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| 10 | |
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| 11 | // <array> |
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| 12 | |
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| 13 | // LWG-3382 NTTP for pair and array: |
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| 14 | // array<T, N> is a structural type ([temp.param]) if T is a structural type. |
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| 15 | |
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| 16 | #include <array> |
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| 17 | |
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| 18 | #include <cstddef> |
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| 19 | #include <string> |
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| 20 | |
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| 21 | struct LiteralBase {}; |
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| 22 | struct LiteralNSDM {}; |
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| 23 | |
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| 24 | struct LiteralType : LiteralBase { |
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| 25 | LiteralNSDM nsdm; |
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| 26 | }; |
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| 27 | |
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| 28 | struct NotALiteral { |
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| 29 | NotALiteral() {} |
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| 30 | }; |
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| 31 | |
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| 32 | int i; |
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| 33 | NotALiteral not_a_literal; |
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| 34 | |
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| 35 | namespace test_full_type { |
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| 36 | template <class T, std::size_t S, std::array<T, S> A> |
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| 37 | struct test {}; |
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| 38 | |
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| 39 | using A = test<int, 2, std::array{2, 3}>; |
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| 40 | using B = test<LiteralType, 0, std::array<LiteralType, 0>{}>; |
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| 41 | using C = test<int*, 1, std::array<int*, 1>{&i}>; |
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| 42 | using D = test<NotALiteral*, 1, std::array<NotALiteral*, 1>{¬_a_literal}>; |
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| 43 | |
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| 44 | using E = test<NotALiteral, 1, std::array<NotALiteral, 1>{}>; |
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| 45 | // expected-error-re@*:* {{non-type template parameter has non-literal type 'std::array<NotALiteral, 1U{{L{0,2}.*}}>'}} |
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| 46 | |
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| 47 | using F = test<std::string, 2, std::array<std::string, 2>{}>; |
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| 48 | // expected-error-re@*:* {{type 'std::array<{{(std::)?}}string, 2U{{L{0,2}.*}}>' {{(\(aka 'array<basic_string<char>, 2UL{0,2}>'\) )?}}of non-type template parameter is not a structural type}} |
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| 49 | } // namespace test_full_type |
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| 50 | |
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| 51 | namespace test_ctad { |
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| 52 | template <std::array A> |
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| 53 | struct test {}; |
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| 54 | |
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| 55 | using A = test<std::array{2, 3}>; |
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| 56 | using B = test<std::array<LiteralType, 0>{}>; |
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| 57 | using C = test<std::array<int*, 1>{&i}>; |
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| 58 | using D = test<std::array<NotALiteral*, 1>{¬_a_literal}>; |
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| 59 | |
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| 60 | using E = test<std::array<NotALiteral, 1>{}>; |
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| 61 | // expected-error@-1 {{non-type template parameter has non-literal type 'std::array<NotALiteral, 1>'}} |
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| 62 | |
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| 63 | using F = test<std::array<std::string, 2>{}>; |
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| 64 | // expected-error-re@-1 {{type 'std::array<{{(std::)?}}string, 2>'{{( \(aka 'std::array<std::string, 2>'\))?}} of non-type template parameter is not a structural type}} |
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| 65 | } // namespace test_ctad |
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| 66 | |
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| 67 | namespace test_auto { |
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| 68 | template <auto A> |
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| 69 | struct test {}; |
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| 70 | |
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| 71 | using A = test<std::array{2, 3}>; |
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| 72 | using B = test<std::array<LiteralType, 0>{}>; |
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| 73 | using C = test<std::array<int*, 1>{&i}>; |
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| 74 | using D = test<std::array<NotALiteral*, 1>{¬_a_literal}>; |
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| 75 | |
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| 76 | using E = test<std::array<NotALiteral, 1>{}>; |
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| 77 | // expected-error@-1 {{non-type template parameter has non-literal type 'std::array<NotALiteral, 1>'}} |
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| 78 | |
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| 79 | using F = test<std::array<std::string, 2>{}>; |
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| 80 | // expected-error@-1 {{type 'std::array<std::string, 2>' (aka 'array<basic_string<char>, 2>') of non-type template parameter is not a structural type}} |
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| 81 | } // namespace test_auto |
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| 82 | |
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