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 11 // UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME 12 13 // <format> 14 15 // template<class charT, formattable<charT>... Ts> 16 // struct formatter<pair-or-tuple<Ts...>, charT> 17 18 // template<class FormatContext> 19 // typename FormatContext::iterator 20 // format(see below& elems, FormatContext& ctx) const; 21 22 // Note this tests the basics of this function. It's tested in more detail in 23 // the format functions tests. 24 25 #include <cassert> 26 #include <concepts> 27 #include <format> 28 #include <iterator> 29 #include <tuple> 30 #include <utility> 31 32 #include "assert_macros.h" 33 #include "format.functions.common.h" 34 #include "make_string.h" 35 #include "test_format_context.h" 36 #include "test_macros.h" 37 38 #define SV(S) MAKE_STRING_VIEW(CharT, S) 39 40 template <class StringViewT, class Arg> 41 void test(StringViewT expected, Arg arg) { 42 using CharT = typename StringViewT::value_type; 43 using String = std::basic_string<CharT>; 44 using OutIt = std::back_insert_iterator<String>; 45 using FormatCtxT = std::basic_format_context<OutIt, CharT>; 46 47 const std::formatter<Arg, CharT> formatter; 48 49 String result; 50 OutIt out = std::back_inserter(result); 51 FormatCtxT format_ctx = test_format_context_create<OutIt, CharT>(out, std::make_format_args<FormatCtxT>(arg)); 52 formatter.format(arg, format_ctx); 53 assert(result == expected); 54 } 55 56 template <class CharT> 57 void test_assure_parse_is_called(std::basic_string_view<CharT> fmt) { 58 using String = std::basic_string<CharT>; 59 using OutIt = std::back_insert_iterator<String>; 60 using FormatCtxT = std::basic_format_context<OutIt, CharT>; 61 std::pair<parse_call_validator, parse_call_validator> arg; 62 63 String result; 64 OutIt out = std::back_inserter(result); 65 FormatCtxT format_ctx = test_format_context_create<OutIt, CharT>(out, std::make_format_args<FormatCtxT>(arg)); 66 67 std::formatter<decltype(arg), CharT> formatter; 68 std::basic_format_parse_context<CharT> ctx{fmt}; 69 70 formatter.parse(ctx); 71 formatter.format(arg, format_ctx); 72 } 73 74 template <class CharT> 75 void test_assure_parse_is_called() { 76 using String = std::basic_string<CharT>; 77 using OutIt = std::back_insert_iterator<String>; 78 using FormatCtxT = std::basic_format_context<OutIt, CharT>; 79 std::pair<parse_call_validator, parse_call_validator> arg; 80 81 String result; 82 OutIt out = std::back_inserter(result); 83 [[maybe_unused]] FormatCtxT format_ctx = 84 test_format_context_create<OutIt, CharT>(out, std::make_format_args<FormatCtxT>(arg)); 85 86 { // parse not called 87 [[maybe_unused]] const std::formatter<decltype(arg), CharT> formatter; 88 TEST_THROWS_TYPE(parse_call_validator::parse_function_not_called, formatter.format(arg, format_ctx)); 89 } 90 91 test_assure_parse_is_called(SV("5")); 92 test_assure_parse_is_called(SV("n")); 93 test_assure_parse_is_called(SV("m")); 94 test_assure_parse_is_called(SV("5n")); 95 test_assure_parse_is_called(SV("5m")); 96 } 97 98 template <class CharT> 99 void test() { 100 test(SV("(1)"), std::tuple<int>{1}); 101 test(SV("(1, 1)"), std::tuple<int, CharT>{1, CharT('1')}); 102 test(SV("(1, 1)"), std::pair<int, CharT>{1, CharT('1')}); 103 test(SV("(1, 1, true)"), std::tuple<int, CharT, bool>{1, CharT('1'), true}); 104 105 test_assure_parse_is_called<CharT>(); 106 } 107 108 void test() { 109 test<char>(); 110 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 111 test<wchar_t>(); 112 #endif 113 } 114 115 int main(int, char**) { 116 test(); 117 118 return 0; 119 } 120