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// UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME
11
12// XFAIL: availability-fp_to_chars-missing
13
14// <format>
15
16// template<class charT, formattable<charT>... Ts>
17// struct formatter<pair-or-tuple<Ts...>, charT>
18//
19// tested in the format functions
20//
21// string vformat(string_view fmt, format_args args);
22// wstring vformat(wstring_view fmt, wformat_args args);
23
24#include <format>
25#include <cassert>
26
27#include "test_macros.h"
28#include "format.functions.tests.h"
29#include "assert_macros.h"
30#include "concat_macros.h"
31
32auto test = []<class CharT, class... Args>(
33 std::basic_string_view<CharT> expected, std::basic_string_view<CharT> fmt, Args&&... args) {
34 std::basic_string<CharT> out = std::vformat(fmt, std::make_format_args<context_t<CharT>>(args...));
35 TEST_REQUIRE(out == expected,
36 TEST_WRITE_CONCATENATED(
37 "\nFormat string ", fmt, "\nExpected output ", expected, "\nActual output ", out, '\n'));
38};
39
40auto test_exception =
41 []<class CharT, class... Args>(
42 [[maybe_unused]] std::string_view what,
43 [[maybe_unused]] std::basic_string_view<CharT> fmt,
44 [[maybe_unused]] Args&&... args) {
45 TEST_VALIDATE_EXCEPTION(
46 std::format_error,
47 [&]([[maybe_unused]] const std::format_error& e) {
48 TEST_LIBCPP_REQUIRE(
49 e.what() == what,
50 TEST_WRITE_CONCATENATED(
51 "\nFormat string ", fmt, "\nExpected exception ", what, "\nActual exception ", e.what(), '\n'));
52 },
53 TEST_IGNORE_NODISCARD std::vformat(fmt, std::make_format_args<context_t<CharT>>(args...)));
54 };
55
56int main(int, char**) {
57 run_tests<char>(check: test, check_exception: test_exception);
58
59#ifndef TEST_HAS_NO_WIDE_CHARACTERS
60 run_tests<wchar_t>(check: test, check_exception: test_exception);
61#endif
62
63 return 0;
64}
65

source code of libcxx/test/std/utilities/format/format.tuple/format.functions.vformat.pass.cpp