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// <vector>
14
15// template<class T, class charT>
16// requires is-vector-bool-reference<T>
17// struct formatter<T, charT>
18
19// template<class FormatContext>
20// typename FormatContext::iterator
21// format(const T& r, FormatContext& ctx) const;
22
23// Note this tests the basics of this function. It's tested in more detail in
24// the format functions test.
25
26#include <cassert>
27#include <concepts>
28#include <format>
29#include <iterator>
30#include <vector>
31
32#include "test_format_context.h"
33#include "test_macros.h"
34#include "make_string.h"
35
36#define SV(S) MAKE_STRING_VIEW(CharT, S)
37
38template <class StringViewT>
39void test_format(StringViewT expected, std::vector<bool>::reference arg) {
40 using CharT = typename StringViewT::value_type;
41 using String = std::basic_string<CharT>;
42 using OutIt = std::back_insert_iterator<String>;
43 using FormatCtxT = std::basic_format_context<OutIt, CharT>;
44
45 const std::formatter<std::vector<bool>::reference, CharT> formatter;
46
47 String result;
48 OutIt out = std::back_inserter(result);
49 FormatCtxT format_ctx = test_format_context_create<OutIt, CharT>(out, std::make_format_args<FormatCtxT>(arg));
50 formatter.format(arg, format_ctx);
51 assert(result == expected);
52}
53
54template <class CharT>
55void test_fmt() {
56 test_format(SV("true"), std::vector<bool>{true}[0]);
57 test_format(SV("false"), std::vector<bool>{false}[0]);
58}
59
60void test() {
61 test_fmt<char>();
62#ifndef TEST_HAS_NO_WIDE_CHARACTERS
63 test_fmt<wchar_t>();
64#endif
65}
66
67int main(int, char**) {
68 test();
69
70 return 0;
71}
72

source code of libcxx/test/std/containers/sequences/vector.bool/vector.bool.fmt/format.pass.cpp