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 // <format> 12 13 // template<ranges::input_range R, class charT> 14 // requires (K == range_format::string || K == range_format::debug_string) 15 // struct range-default-formatter<K, R, charT> 16 17 // template<class FormatContext> 18 // typename FormatContext::iterator 19 // format(const T& ref, FormatContext& ctx) const; 20 21 // Note this tests the basics of this function. It's tested in more detail in 22 // the format.functions test. 23 24 #include <cassert> 25 #include <concepts> 26 #include <format> 27 28 #include "format.functions.tests.h" 29 #include "test_format_context.h" 30 #include "test_macros.h" 31 32 template <class StringViewT, class ArgT> 33 void test_format(StringViewT expected, ArgT arg) { 34 using CharT = typename StringViewT::value_type; 35 using String = std::basic_string<CharT>; 36 using OutIt = std::back_insert_iterator<String>; 37 using FormatCtxT = std::basic_format_context<OutIt, CharT>; 38 39 std::formatter<ArgT, CharT> formatter; 40 41 String result; 42 OutIt out = std::back_inserter(result); 43 FormatCtxT format_ctx = test_format_context_create<OutIt, CharT>(out, std::make_format_args<FormatCtxT>(arg)); 44 formatter.format(arg, format_ctx); 45 assert(result == expected); 46 } 47 48 template <class CharT> 49 void test_fmt() { 50 test_format(SV("hello"), test_range_format_string<std::basic_string<CharT>>{STR("hello")}); 51 test_format(SV("hello"), test_range_format_debug_string<std::basic_string<CharT>>{STR("hello")}); 52 } 53 54 void test() { 55 test_fmt<char>(); 56 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 57 test_fmt<wchar_t>(); 58 #endif 59 } 60 61 int main(int, char**) { 62 test(); 63 64 return 0; 65 } 66