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 // <vector> 13 14 // template<class T, class charT> 15 // requires is-vector-bool-reference<T> 16 // struct formatter<T, charT> 17 18 // template<class ParseContext> 19 // constexpr typename ParseContext::iterator 20 // parse(ParseContext& ctx); 21 22 // Note this tests the basics of this function. It's tested in more detail in 23 // the format functions test. 24 25 #include <cassert> 26 #include <concepts> 27 #include <format> 28 #include <vector> 29 30 #include "test_format_context.h" 31 #include "test_macros.h" 32 #include "make_string.h" 33 34 #define SV(S) MAKE_STRING_VIEW(CharT, S) 35 36 template <class StringViewT> 37 constexpr void test_parse(StringViewT fmt, std::size_t offset) { 38 using CharT = typename StringViewT::value_type; 39 auto parse_ctx = std::basic_format_parse_context<CharT>(fmt); 40 std::formatter<std::vector<bool, std::allocator<bool>>::reference, CharT> formatter; 41 static_assert(std::semiregular<decltype(formatter)>); 42 43 std::same_as<typename StringViewT::iterator> auto it = formatter.parse(parse_ctx); 44 assert(it == fmt.end() - offset); 45 } 46 47 template <class CharT> 48 constexpr void test_fmt() { 49 test_parse(SV(""), 0); 50 test_parse(SV("b"), 0); 51 52 test_parse(SV("}"), 1); 53 test_parse(SV("b}"), 1); 54 } 55 56 constexpr bool test() { 57 test_fmt<char>(); 58 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 59 test_fmt<wchar_t>(); 60 #endif 61 62 return true; 63 } 64 65 int main(int, char**) { 66 test(); 67 static_assert(test()); 68 69 return 0; 70 } 71