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-has-no-localization 10 // UNSUPPORTED: libcpp-has-no-incomplete-format 11 // TODO FMT Evaluate gcc-11 status 12 // UNSUPPORTED: gcc-11 13 14 // <format> 15 16 // template<class... Args> 17 // string format(const locale& loc, string_view fmt, const Args&... args); 18 // template<class... Args> 19 // wstring format(const locale& loc, wstring_view fmt, const Args&... args); 20 21 #include <format> 22 #include <cassert> 23 #include <iostream> 24 #include <vector> 25 26 #include "test_macros.h" 27 #include "format_tests.h" 28 29 auto test = []<class CharT, class... Args>(std::basic_string_view<CharT> expected, std::basic_string_view<CharT> fmt, 30 const Args&... args) { 31 std::basic_string<CharT> out = std::format(std::locale(), fmt, args...); 32 if constexpr (std::same_as<CharT, char>) 33 if (out != expected) 34 std::cerr << "\nFormat string " << fmt << "\nExpected output " << expected << "\nActual output " << out 35 << '\n'; 36 assert(out == expected); 37 }; 38 39 auto test_exception = []<class CharT, class... Args>(std::string_view what, std::basic_string_view<CharT> fmt, 40 const Args&... args) { 41 #ifndef TEST_HAS_NO_EXCEPTIONS 42 try { 43 std::format(std::locale(), fmt, args...); 44 if constexpr (std::same_as<CharT, char>) 45 std::cerr << "\nFormat string " << fmt << "\nDidn't throw an exception.\n"; 46 assert(false); 47 } catch (const std::format_error& e) { 48 # ifdef _LIBCPP_VERSION 49 if constexpr (std::same_as<CharT, char>) 50 if (e.what() != what) 51 std::cerr << "\nFormat string " << fmt << "\nExpected exception " << what << "\nActual exception " 52 << e.what() << '\n'; 53 # endif 54 LIBCPP_ASSERT(e.what() == what); 55 return; 56 } 57 assert(false); 58 #else 59 (void)what; 60 (void)fmt; 61 (void)sizeof...(args); 62 #endif 63 }; 64 65 int main(int, char**) { 66 format_tests<char>(test, test_exception); 67 68 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 69 format_tests_char_to_wchar_t(test); 70 format_tests<wchar_t>(test, test_exception); 71 #endif 72 73 return 0; 74 } 75