| 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 |
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| 10 | |
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| 11 | // <string_view> |
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| 12 | |
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| 13 | // Test that the constructors offered by std::basic_string_view are formulated |
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| 14 | // so they're compatible with implicit deduction guides. |
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| 15 | |
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| 16 | #include <string_view> |
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| 17 | #include <cassert> |
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| 18 | |
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| 19 | #include "test_macros.h" |
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| 20 | #include "constexpr_char_traits.h" |
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| 21 | |
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| 22 | // Overloads |
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| 23 | // --------------- |
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| 24 | // (1) basic_string_view() - NOT TESTED |
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| 25 | // (2) basic_string_view(const basic_string_view&) |
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| 26 | // (3) basic_string_view(const CharT*, size_type) |
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| 27 | // (4) basic_string_view(const CharT*) |
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| 28 | int main(int, char**) { |
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| 29 | { |
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| 30 | // Testing (1) |
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| 31 | // Nothing to do. Cannot deduce without any arguments. |
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| 32 | } |
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| 33 | { // Testing (2) |
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| 34 | const std::string_view sin("abc" ); |
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| 35 | std::basic_string_view s(sin); |
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| 36 | ASSERT_SAME_TYPE(decltype(s), std::string_view); |
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| 37 | assert(s == "abc" ); |
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| 38 | |
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| 39 | #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
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| 40 | using WSV = std::basic_string_view<wchar_t, constexpr_char_traits<wchar_t>>; |
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| 41 | const WSV win(L"abcdef" ); |
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| 42 | std::basic_string_view w(win); |
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| 43 | ASSERT_SAME_TYPE(decltype(w), WSV); |
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| 44 | assert(w == L"abcdef" ); |
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| 45 | #endif |
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| 46 | } |
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| 47 | { // Testing (3) |
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| 48 | std::basic_string_view s("abc" , 2); |
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| 49 | ASSERT_SAME_TYPE(decltype(s), std::string_view); |
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| 50 | assert(s == "ab" ); |
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| 51 | |
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| 52 | #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
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| 53 | std::basic_string_view w(L"abcdef" , 4); |
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| 54 | ASSERT_SAME_TYPE(decltype(w), std::wstring_view); |
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| 55 | assert(w == L"abcd" ); |
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| 56 | #endif |
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| 57 | } |
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| 58 | { // Testing (4) |
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| 59 | std::basic_string_view s("abc" ); |
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| 60 | ASSERT_SAME_TYPE(decltype(s), std::string_view); |
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| 61 | assert(s == "abc" ); |
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| 62 | |
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| 63 | #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
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| 64 | std::basic_string_view w(L"abcdef" ); |
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| 65 | ASSERT_SAME_TYPE(decltype(w), std::wstring_view); |
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| 66 | assert(w == L"abcdef" ); |
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| 67 | #endif |
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| 68 | } |
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| 69 | |
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| 70 | return 0; |
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| 71 | } |
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| 72 | |
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