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// <format>
14
15// template<ranges::input_range R, class charT>
16// struct range-default-formatter<range_format::sequence, R, charT>
17
18// constexpr void constexpr void set_brackets(basic_string_view<charT> opening,
19// basic_string_view<charT> closing) noexcept;
20
21#include <format>
22#include <cassert>
23#include <iterator>
24#include <type_traits>
25#include <vector>
26
27#include "make_string.h"
28#include "test_format_context.h"
29
30#define SV(S) MAKE_STRING_VIEW(CharT, S)
31
32template <class CharT>
33constexpr void test_setter() {
34 std::formatter<std::vector<int>, CharT> formatter;
35 formatter.set_brackets(SV("open"), SV("close"));
36 // Note the SV macro may throw, so can't use it.
37 static_assert(noexcept(formatter.set_brackets(std::basic_string_view<CharT>{}, std::basic_string_view<CharT>{})));
38
39 // Note there is no direct way to validate this function modified the object.
40 if (!std::is_constant_evaluated()) {
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 String result;
46 OutIt out = std::back_inserter(result);
47 FormatCtxT format_ctx = test_format_context_create<OutIt, CharT>(out, std::make_format_args<FormatCtxT>());
48 formatter.format(std::vector<int>{0, 42, 99}, format_ctx);
49 assert(result == SV("open0, 42, 99close"));
50 }
51}
52
53constexpr bool test() {
54 test_setter<char>();
55#ifndef TEST_HAS_NO_WIDE_CHARACTERS
56 test_setter<wchar_t>();
57#endif
58
59 return true;
60}
61
62int main(int, char**) {
63 test();
64 static_assert(test());
65
66 return 0;
67}
68

source code of libcxx/test/std/utilities/format/format.range/format.range.fmtdef/set_brackets.pass.cpp