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 9 // UNSUPPORTED: libcpp-no-concepts 10 // UNSUPPORTED: libcpp-has-no-incomplete-format 11 // TODO FMT Evaluate gcc-11 status 12 // UNSUPPORTED: gcc-11 13 14 // Note this formatter shows additional information when tests are failing. 15 // This aids the development. Since other formatters fail in the same fashion 16 // they don't have this additional output. 17 18 // <format> 19 20 // template<class... Args> 21 // string format(string_view fmt, const Args&... args); 22 // template<class... Args> 23 // wstring format(wstring_view fmt, const Args&... args); 24 25 #include <format> 26 #include <cassert> 27 #ifndef _LIBCPP_HAS_NO_LOCALIZATION 28 #include <iostream> 29 #endif 30 #include <vector> 31 32 #include "test_macros.h" 33 #include "format_tests.h" 34 35 auto test = []<class CharT, class... Args>(std::basic_string<CharT> expected, 36 std::basic_string<CharT> fmt, 37 const Args&... args) { 38 std::basic_string<CharT> out = std::format(fmt, args...); 39 #ifndef _LIBCPP_HAS_NO_LOCALIZATION 40 if constexpr (std::same_as<CharT, char>) 41 if (out != expected) 42 std::cerr << "\nFormat string " << fmt << "\nExpected output " 43 << expected << "\nActual output " << out << '\n'; 44 #endif 45 assert(out == expected); 46 }; 47 48 auto test_exception = []<class CharT, class... Args>( 49 std::string_view what, std::basic_string<CharT> fmt, const Args&... args) { 50 #ifndef TEST_HAS_NO_EXCEPTIONS 51 try { 52 std::format(fmt, args...); 53 #ifndef _LIBCPP_HAS_NO_LOCALIZATION 54 if constexpr (std::same_as<CharT, char>) 55 std::cerr << "\nFormat string " << fmt 56 << "\nDidn't throw an exception.\n"; 57 #endif 58 assert(false); 59 } catch (std::format_error& e) { 60 #if defined(_LIBCPP_VERSION) && !defined(_LIBCPP_HAS_NO_LOCALIZATION) 61 if constexpr (std::same_as<CharT, char>) 62 if (e.what() != what) 63 std::cerr << "\nFormat string " << fmt << "\nExpected exception " 64 << what << "\nActual exception " << e.what() << '\n'; 65 #endif 66 LIBCPP_ASSERT(e.what() == what); 67 return; 68 } 69 assert(false); 70 #else 71 (void)what; 72 (void)fmt; 73 (void)sizeof...(args); 74 #endif 75 }; 76 77 int main(int, char**) { 78 format_tests_char_to_wchar_t(test); 79 80 format_tests<char>(test, test_exception); 81 format_tests<wchar_t>(test, test_exception); 82 83 return 0; 84 } 85