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 // UNSUPPORTED: libcpp-has-no-incomplete-format 11 12 // libc++ supports basic_format_string in C++20 as an extension 13 // UNSUPPORTED: !stdlib=libc++ && c++20 14 15 // <format> 16 17 // template<class charT, class... Args> 18 // class basic_format_string<charT, type_identity_t<Args>...> 19 // 20 // constexpr basic_string_view<charT> get() const noexcept { return str; } 21 22 #include <format> 23 24 #include <cassert> 25 #include <concepts> 26 #include <string_view> 27 28 #include "test_macros.h" 29 #include "make_string.h" 30 31 #define CSTR(S) MAKE_CSTRING(CharT, S) 32 #define SV(S) MAKE_STRING_VIEW(CharT, S) 33 34 template <class CharT> 35 constexpr bool test() { 36 assert((std::basic_format_string<CharT>{CSTR("foo")}.get() == SV("foo"))); 37 assert((std::basic_format_string<CharT, int>{CSTR("{}")}.get() == SV("{}"))); 38 assert((std::basic_format_string<CharT, int, char>{CSTR("{} {:*>6}")}.get() == SV("{} {:*>6}"))); 39 40 // Embedded NUL character 41 assert((std::basic_format_string<CharT, void*, bool>{SV("{}\0{}")}.get() == SV("{}\0{}"))); 42 return true; 43 } 44 45 int main(int, char**) { 46 test<char>(); 47 static_assert(test<char>()); 48 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 49 test<wchar_t>(); 50 static_assert(test<wchar_t>()); 51 #endif 52 return 0; 53 } 54