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: GCC-ALWAYS_INLINE-FIXME
10
11// XFAIL: availability-fp_to_chars-missing
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#include "assert_macros.h"
33#include "concat_macros.h"
34
35auto test =
36 []<class CharT, class... Args>(
37 std::basic_string_view<CharT> expected, test_format_string<CharT, Args...> fmt, Args&&... args) constexpr {
38 std::basic_string<CharT> out = std::format(fmt, std::forward<Args>(args)...);
39 TEST_REQUIRE(
40 out == expected,
41 TEST_WRITE_CONCATENATED(
42 "\nFormat string ", fmt.get(), "\nExpected output ", expected, "\nActual output ", out, '\n'));
43 };
44
45auto 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 // A basic ill-formed test is done in format.verify.cpp
49 // The exceptions are tested by other functions that don't use the basic-format-string as fmt argument.
50};
51
52int main(int, char**) {
53 format_tests<char, execution_modus::full>(check: test, check_exception: test_exception);
54
55#ifndef TEST_HAS_NO_WIDE_CHARACTERS
56 format_tests_char_to_wchar_t(check: test);
57 format_tests<wchar_t, execution_modus::full>(check: test, check_exception: test_exception);
58#endif
59
60 return 0;
61}
62

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