1 //===----------------------------------------------------------------------===// 2 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 3 // See https://llvm.org/LICENSE.txt for license information. 4 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 5 // 6 //===----------------------------------------------------------------------===// 7 8 // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20 9 // UNSUPPORTED: libcpp-has-no-incomplete-format 10 11 // TODO FMT Fix this test using GCC, it currently times out. 12 // UNSUPPORTED: gcc-12 13 14 // This test requires the dylib support introduced in D92214. 15 // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{.+}} 16 // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx11.{{.+}} 17 18 // <format> 19 20 // template<class charT, formattable<charT>... Ts> 21 // struct formatter<pair-or-tuple<Ts...>, charT> 22 23 // template<class ParseContext> 24 // constexpr typename ParseContext::iterator 25 // parse(ParseContext& ctx); 26 27 // Note this tests the basics of this function. It's tested in more detail in 28 // the format functions tests. 29 30 #include <cassert> 31 #include <concepts> 32 #include <format> 33 #include <tuple> 34 #include <utility> 35 36 #include "test_format_context.h" 37 #include "test_macros.h" 38 #include "make_string.h" 39 40 #define SV(S) MAKE_STRING_VIEW(CharT, S) 41 42 template <class Arg, class StringViewT> 43 constexpr void test(StringViewT fmt) { 44 using CharT = typename StringViewT::value_type; 45 auto parse_ctx = std::basic_format_parse_context<CharT>(fmt); 46 std::formatter<Arg, CharT> formatter; 47 static_assert(std::semiregular<decltype(formatter)>); 48 49 std::same_as<typename StringViewT::iterator> auto it = formatter.parse(parse_ctx); 50 assert(it == fmt.end() - (!fmt.empty() && fmt.back() == '}')); 51 } 52 53 template <class CharT, class Arg> 54 constexpr void test() { 55 test<Arg>(SV("")); 56 test<Arg>(SV("42")); 57 58 test<Arg>(SV("}")); 59 test<Arg>(SV("42}")); 60 } 61 62 template <class CharT> 63 constexpr void test() { 64 test<CharT, std::tuple<int>>(); 65 test<CharT, std::tuple<int, CharT>>(); 66 test<CharT, std::pair<int, CharT>>(); 67 test<CharT, std::tuple<int, CharT, double>>(); 68 } 69 70 constexpr bool test() { 71 test<char>(); 72 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 73 test<wchar_t>(); 74 #endif 75 76 return true; 77 } 78 79 int main(int, char**) { 80 test(); 81 static_assert(test()); 82 83 return 0; 84 } 85