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// template<class... Args>
18// size_t formatted_size(const locale& loc,
19// format-string<Args...> fmt, const Args&... args);
20// template<class... Args>
21// size_t formatted_size(const locale& loc,
22// wformat-string<Args...> fmt, const Args&... args);
23
24#include <format>
25#include <cassert>
26#include <locale>
27#include <vector>
28
29#include "test_macros.h"
30#include "format_tests.h"
31#include "string_literal.h"
32#include "test_format_string.h"
33
34auto test =
35 []<class CharT, class... Args>(
36 std::basic_string_view<CharT> expected, test_format_string<CharT, Args...> fmt, Args&&... args) constexpr {
37 std::size_t size = std::formatted_size(std::locale(), fmt, std::forward<Args>(args)...);
38 assert(size == expected.size());
39 };
40
41auto test_exception = []<class CharT, class... Args>(std::string_view, std::basic_string_view<CharT>, Args&&...) {
42 // After P2216 most exceptions thrown by std::formatted_siz3 become ill-formed.
43 // Therefore this tests does nothing.
44 // A basic ill-formed test is done in formatted_size.locale.verify.cpp
45 // The exceptions are tested by other functions that don't use the basic-format-string as fmt argument.
46};
47
48int main(int, char**) {
49 format_tests<char, execution_modus::partial>(check: test, check_exception: test_exception);
50
51#ifndef TEST_HAS_NO_WIDE_CHARACTERS
52 format_tests_char_to_wchar_t(check: test);
53 format_tests<wchar_t, execution_modus::partial>(check: test, check_exception: test_exception);
54#endif
55
56 return 0;
57}
58

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