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
33 template <class CharT>
test()34 constexpr 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
main(int,char **)44 int 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