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// <format>
13
14// class range_formatter
15// template<class charT, formattable<charT>... Ts>
16// struct formatter<pair-or-tuple<Ts...>, charT>
17
18// constexpr void set_separator(basic_string_view<charT> sep) noexcept;
19
20// Note this tests the basics of this function. It's tested in more detail in
21// the format functions tests.
22
23#include <format>
24#include <tuple>
25#include <utility>
26
27#include "make_string.h"
28
29#define SV(S) MAKE_STRING_VIEW(CharT, S)
30
31template <class CharT, class Arg>
32constexpr void test() {
33 std::formatter<Arg, CharT> formatter;
34 formatter.set_separator(SV("sep"));
35 // Note the SV macro may throw, so can't use it.
36 static_assert(noexcept(formatter.set_separator(std::basic_string_view<CharT>{})));
37
38 // Note there is no direct way to validate this function modified the object.
39}
40
41template <class CharT>
42constexpr void test() {
43 test<CharT, std::tuple<int>>();
44 test<CharT, std::tuple<int, CharT>>();
45 test<CharT, std::pair<int, CharT>>();
46 test<CharT, std::tuple<int, CharT, bool>>();
47}
48
49constexpr bool test() {
50 test<char>();
51#ifndef TEST_HAS_NO_WIDE_CHARACTERS
52 test<wchar_t>();
53#endif
54
55 return true;
56}
57
58int main(int, char**) {
59 test();
60 static_assert(test());
61
62 return 0;
63}
64

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