| 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 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
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| 9 | |
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| 10 | // <string> |
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| 11 | |
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| 12 | // template<> struct char_traits<char8_t> |
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| 13 | |
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| 14 | // static constexpr size_t length(const char_type* s); |
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| 15 | |
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| 16 | #include <string> |
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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 | |
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| 21 | #ifndef TEST_HAS_NO_CHAR8_T |
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| 22 | constexpr bool test_constexpr() { |
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| 23 | return std::char_traits<char8_t>::length(u8"" ) == 0 && std::char_traits<char8_t>::length(u8"abcd" ) == 4; |
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| 24 | } |
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| 25 | |
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| 26 | int main(int, char**) { |
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| 27 | assert(std::char_traits<char8_t>::length(u8"" ) == 0); |
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| 28 | assert(std::char_traits<char8_t>::length(u8"a" ) == 1); |
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| 29 | assert(std::char_traits<char8_t>::length(u8"aa" ) == 2); |
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| 30 | assert(std::char_traits<char8_t>::length(u8"aaa" ) == 3); |
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| 31 | assert(std::char_traits<char8_t>::length(u8"aaaa" ) == 4); |
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| 32 | |
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| 33 | static_assert(test_constexpr(), "" ); |
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| 34 | return 0; |
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| 35 | } |
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| 36 | #else |
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| 37 | int main(int, char**) { return 0; } |
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| 38 | #endif |
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| 39 | |
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