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, c++20
9
10// UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME
11
12// <vector>
13
14// template<class T, class charT>
15// requires is-vector-bool-reference<T>
16// struct formatter<T, charT>
17
18// template<class ParseContext>
19// constexpr typename ParseContext::iterator
20// parse(ParseContext& ctx);
21
22// Note this tests the basics of this function. It's tested in more detail in
23// the format functions test.
24
25#include <cassert>
26#include <concepts>
27#include <format>
28#include <memory>
29#include <vector>
30
31#include "test_macros.h"
32#include "make_string.h"
33
34#define SV(S) MAKE_STRING_VIEW(CharT, S)
35
36template <class StringViewT>
37constexpr void test_parse(StringViewT fmt, std::size_t offset) {
38 using CharT = typename StringViewT::value_type;
39 auto parse_ctx = std::basic_format_parse_context<CharT>(fmt);
40 std::formatter<std::vector<bool, std::allocator<bool>>::reference, CharT> formatter;
41 static_assert(std::semiregular<decltype(formatter)>);
42
43 std::same_as<typename StringViewT::iterator> auto it = formatter.parse(parse_ctx);
44 // std::to_address works around LWG3989 and MSVC STL's iterator debugging mechanism.
45 assert(std::to_address(it) == std::to_address(fmt.end()) - offset);
46}
47
48template <class CharT>
49constexpr void test_fmt() {
50 test_parse(SV(""), 0);
51 test_parse(SV("b"), 0);
52
53 test_parse(SV("}"), 1);
54 test_parse(SV("b}"), 1);
55}
56
57constexpr bool test() {
58 test_fmt<char>();
59#ifndef TEST_HAS_NO_WIDE_CHARACTERS
60 test_fmt<wchar_t>();
61#endif
62
63 return true;
64}
65
66int main(int, char**) {
67 test();
68 static_assert(test());
69
70 return 0;
71}
72

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