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-incomplete-format 10 // TODO FMT Evaluate gcc-12 status 11 // UNSUPPORTED: gcc-12 12 13 // Note this formatter shows additional information when tests are failing. 14 // This aids the development. Since other formatters fail in the same fashion 15 // they don't have this additional output. 16 17 // <format> 18 19 // template<class... Args> 20 // string format(format-string<Args...> fmt, const Args&... args); 21 // template<class... Args> 22 // wstring format(wformat-string<Args...> fmt, const Args&... args); 23 24 #include <format> 25 #include <cassert> 26 #include <vector> 27 28 #include "test_macros.h" 29 #include "format_tests.h" 30 #include "string_literal.h" 31 #include "test_format_string.h" 32 33 #ifndef TEST_HAS_NO_LOCALIZATION 34 # include <iostream> 35 # include <type_traits> 36 #endif 37 38 auto test = 39 []<class CharT, class... Args>( 40 std::basic_string_view<CharT> expected, test_format_string<CharT, Args...> fmt, Args&&... args) constexpr { 41 std::basic_string<CharT> out = std::format(fmt, std::forward<Args>(args)...); 42 #ifndef TEST_HAS_NO_LOCALIZATION 43 if constexpr (std::same_as<CharT, char>) 44 if (out != expected) 45 std::cerr << "\nFormat string " << fmt.get() << "\nExpected output " << expected << "\nActual output " 46 << out << '\n'; 47 #endif 48 assert(out == expected); 49 }; 50 51 auto test_exception = []<class CharT, class... Args>(std::string_view, std::basic_string_view<CharT>, Args&&...) { 52 // After P2216 most exceptions thrown by std::format become ill-formed. 53 // Therefore this tests does nothing. 54 // A basic ill-formed test is done in format.verify.cpp 55 // The exceptions are tested by other functions that don't use the basic-format-string as fmt argument. 56 }; 57 58 int main(int, char**) { 59 format_tests<char, execution_modus::full>(test, test_exception); 60 61 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 62 format_tests_char_to_wchar_t(test); 63 format_tests<wchar_t, execution_modus::full>(test, test_exception); 64 #endif 65 66 return 0; 67 } 68