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
10// UNSUPPORTED: no-localization
11// UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME
12
13// XFAIL: availability-fp_to_chars-missing
14
15// <format>
16
17// string vformat(const locale& loc, string_view fmt, format_args args);
18// wstring vformat(const locale& loc, wstring_view fmt, wformat_args args);
19
20#include <format>
21#include <cassert>
22#include <vector>
23
24#include "test_macros.h"
25#include "format_tests.h"
26#include "string_literal.h"
27#include "assert_macros.h"
28#include "concat_macros.h"
29
30auto test = []<class CharT, class... Args>(
31 std::basic_string_view<CharT> expected, std::basic_string_view<CharT> fmt, Args&&... args) constexpr {
32 std::basic_string<CharT> out = std::vformat(std::locale(), fmt, std::make_format_args<context_t<CharT>>(args...));
33 TEST_REQUIRE(out == expected,
34 TEST_WRITE_CONCATENATED(
35 "\nFormat string ", fmt, "\nExpected output ", expected, "\nActual output ", out, '\n'));
36};
37
38auto test_exception =
39 []<class CharT, class... Args>(
40 [[maybe_unused]] std::string_view what,
41 [[maybe_unused]] std::basic_string_view<CharT> fmt,
42 [[maybe_unused]] Args&&... args) {
43 TEST_VALIDATE_EXCEPTION(
44 std::format_error,
45 [&]([[maybe_unused]] const std::format_error& e) {
46 TEST_LIBCPP_REQUIRE(
47 e.what() == what,
48 TEST_WRITE_CONCATENATED(
49 "\nFormat string ", fmt, "\nExpected exception ", what, "\nActual exception ", e.what(), '\n'));
50 },
51 TEST_IGNORE_NODISCARD std::vformat(std::locale(), fmt, std::make_format_args<context_t<CharT>>(args...)));
52 };
53
54int main(int, char**) {
55 format_tests<char, execution_modus::full>(check: test, check_exception: test_exception);
56
57#ifndef TEST_HAS_NO_WIDE_CHARACTERS
58 format_tests_char_to_wchar_t(check: test);
59 format_tests<wchar_t, execution_modus::full>(check: test, check_exception: test_exception);
60#endif
61
62 return 0;
63}
64

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