1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20 10 // UNSUPPORTED: no-threads 11 12 // UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME 13 14 // <thread> 15 16 // template<class charT> 17 // struct formatter<thread::id, charT>; 18 19 // template<class ParseContext> 20 // constexpr typename ParseContext::iterator 21 // parse(ParseContext& ctx); 22 23 // Note this tests the basics of this function. It's tested in more detail in 24 // the format functions test. 25 26 #include <cassert> 27 #include <concepts> 28 #include <format> 29 #include <memory> 30 #include <thread> 31 32 #include "test_macros.h" 33 #include "make_string.h" 34 35 #define SV(S) MAKE_STRING_VIEW(CharT, S) 36 37 template <class StringViewT> 38 constexpr void test_parse(StringViewT fmt, std::size_t offset) { 39 using CharT = typename StringViewT::value_type; 40 auto parse_ctx = std::basic_format_parse_context<CharT>(fmt); 41 std::formatter<std::thread::id, CharT> formatter; 42 static_assert(std::semiregular<decltype(formatter)>); 43 44 std::same_as<typename StringViewT::iterator> auto it = formatter.parse(parse_ctx); 45 // std::to_address works around LWG3989 and MSVC STL's iterator debugging mechanism. 46 assert(std::to_address(it) == std::to_address(fmt.end()) - offset); 47 } 48 49 template <class CharT> 50 constexpr void test_fmt() { 51 test_parse(SV(""), 0); 52 test_parse(SV("1"), 0); 53 54 test_parse(SV("}"), 1); 55 test_parse(SV("1}"), 1); 56 } 57 58 constexpr bool test() { 59 test_fmt<char>(); 60 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 61 test_fmt<wchar_t>(); 62 #endif 63 64 return true; 65 } 66 67 int main(int, char**) { 68 test(); 69 static_assert(test()); 70 71 return 0; 72 } 73