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 // <vector> 14 15 // template<class T, class charT> 16 // requires is-vector-bool-reference<T> 17 // struct formatter<T, charT> 18 19 // template<class FormatContext> 20 // typename FormatContext::iterator 21 // format(const T& r, FormatContext& ctx) const; 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 <iterator> 30 #include <vector> 31 32 #include "test_format_context.h" 33 #include "test_macros.h" 34 #include "make_string.h" 35 36 #define SV(S) MAKE_STRING_VIEW(CharT, S) 37 38 template <class StringViewT> 39 void test_format(StringViewT expected, std::vector<bool>::reference arg) { 40 using CharT = typename StringViewT::value_type; 41 using String = std::basic_string<CharT>; 42 using OutIt = std::back_insert_iterator<String>; 43 using FormatCtxT = std::basic_format_context<OutIt, CharT>; 44 45 const std::formatter<std::vector<bool>::reference, CharT> formatter; 46 47 String result; 48 OutIt out = std::back_inserter(result); 49 FormatCtxT format_ctx = test_format_context_create<OutIt, CharT>(out, std::make_format_args<FormatCtxT>(arg)); 50 formatter.format(arg, format_ctx); 51 assert(result == expected); 52 } 53 54 template <class CharT> 55 void test_fmt() { 56 test_format(SV("true"), std::vector<bool>{true}[0]); 57 test_format(SV("false"), std::vector<bool>{false}[0]); 58 } 59 60 void test() { 61 test_fmt<char>(); 62 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 63 test_fmt<wchar_t>(); 64 #endif 65 } 66 67 int main(int, char**) { 68 test(); 69 70 return 0; 71 } 72