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 // UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME 12 13 // XFAIL: availability-fp_to_chars-missing 14 15 // [container.adaptors.format] 16 // For each of queue, priority_queue, and stack, the library provides the 17 // following formatter specialization where adaptor-type is the name of the 18 // template: 19 // 20 // template<class charT, class T, formattable<charT> Container, class... U> 21 // struct formatter<adaptor-type<T, Container, U...>, charT> 22 23 // template<class... Args> 24 // string format(format_string<Args...> fmt, Args&&... args); 25 // template<class... Args> 26 // wstring format(wformat_string<Args...> fmt, Args&&... args); 27 28 #include <format> 29 #include <cassert> 30 31 #include "format.functions.tests.h" 32 #include "test_format_string.h" 33 #include "test_macros.h" 34 #include "assert_macros.h" 35 #include "concat_macros.h" 36 37 auto test = []<class CharT, class... Args>( 38 std::basic_string_view<CharT> expected, test_format_string<CharT, Args...> fmt, Args&&... args) { 39 std::basic_string<CharT> out = std::format(fmt, std::forward<Args>(args)...); 40 TEST_REQUIRE(out == expected, 41 TEST_WRITE_CONCATENATED( 42 "\nFormat string ", fmt, "\nExpected output ", expected, "\nActual output ", out, '\n')); 43 }; 44 45 auto test_exception = []<class CharT, class... Args>(std::string_view, std::basic_string_view<CharT>, Args&&...) { 46 // After P2216 most exceptions thrown by std::format become ill-formed. 47 // Therefore this tests does nothing. 48 }; 49 50 int main(int, char**) { 51 format_tests<char>(test, test_exception); 52 53 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 54 format_tests<wchar_t>(test, test_exception); 55 #endif 56 57 return 0; 58 } 59