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
11// libc++ supports basic_format_string in C++20 as an extension
12// UNSUPPORTED: !stdlib=libc++ && c++20
13
14// <format>
15
16// template<class charT, class... Args>
17// class basic_format_string<charT, type_identity_t<Args>...>
18//
19// constexpr basic_string_view<charT> get() const noexcept { return str; }
20
21#include <format>
22
23#include <cassert>
24#include <concepts>
25#include <string_view>
26
27#include "test_macros.h"
28#include "make_string.h"
29
30#define CSTR(S) MAKE_CSTRING(CharT, S)
31#define SV(S) MAKE_STRING_VIEW(CharT, S)
32
33template <class CharT>
34constexpr bool test() {
35 assert((std::basic_format_string<CharT>{CSTR("foo")}.get() == SV("foo")));
36 assert((std::basic_format_string<CharT, int>{CSTR("{}")}.get() == SV("{}")));
37 assert((std::basic_format_string<CharT, int, char>{CSTR("{} {:*>6}")}.get() == SV("{} {:*>6}")));
38
39 // Embedded NUL character
40 assert((std::basic_format_string<CharT, void*, bool>{SV("{}\0{}")}.get() == SV("{}\0{}")));
41 return true;
42}
43
44int main(int, char**) {
45 test<char>();
46 static_assert(test<char>());
47#ifndef TEST_HAS_NO_WIDE_CHARACTERS
48 test<wchar_t>();
49 static_assert(test<wchar_t>());
50#endif
51 return 0;
52}
53

source code of libcxx/test/std/utilities/format/format.fmt.string/get.pass.cpp