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 31 #include "test_macros.h" 32 #include "format_tests.h" 33 34 auto test = []<class CharT, class... Args>(std::basic_string<CharT> expected, 35 std::basic_string<CharT> fmt, 36 const Args&... args) { 37 std::basic_string<CharT> out = std::format(fmt, args...); 38 #ifndef _LIBCPP_HAS_NO_LOCALIZATION 39 if constexpr (std::same_as<CharT, char>) 40 if (out != expected) 41 std::cerr << "\nFormat string " << fmt << "\nExpected output " 42 << expected << "\nActual output " << out << '\n'; 43 #endif 44 assert(out == expected); 45 }; 46 47 auto test_exception = []<class CharT, class... Args>( 48 std::string_view what, std::basic_string<CharT> fmt, const Args&... args) { 49 #ifndef TEST_HAS_NO_EXCEPTIONS 50 try { 51 std::format(fmt, args...); 52 #ifndef _LIBCPP_HAS_NO_LOCALIZATION 53 if constexpr (std::same_as<CharT, char>) 54 std::cerr << "\nFormat string " << fmt 55 << "\nDidn't throw an exception.\n"; 56 #endif 57 assert(false); 58 } catch (std::format_error& e) { 59 #if defined(_LIBCPP_VERSION) && !defined(_LIBCPP_HAS_NO_LOCALIZATION) 60 if constexpr (std::same_as<CharT, char>) 61 if (e.what() != what) 62 std::cerr << "\nFormat string " << fmt << "\nExpected exception " 63 << what << "\nActual exception " << e.what() << '\n'; 64 #endif 65 LIBCPP_ASSERT(e.what() == what); 66 return; 67 } 68 assert(false); 69 #else 70 (void)what; 71 (void)fmt; 72 (void)sizeof...(args); 73 #endif 74 }; 75 76 int main(int, char**) { 77 format_tests_char_to_wchar_t(test); 78 79 format_tests<char>(test, test_exception); 80 format_tests<wchar_t>(test, test_exception); 81 82 return 0; 83 } 84