| //===----------------------------------------------------------------------===// |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| // UNSUPPORTED: libcpp-no-concepts |
| // UNSUPPORTED: libcpp-has-no-incomplete-format |
| |
| // <format> |
| |
| // void advance_to(iterator it); |
| |
| #include <format> |
| #include <cassert> |
| #include <string> |
| |
| #include "test_macros.h" |
| #include "test_format_context.h" |
| |
| template <class OutIt, class CharT> |
| void test( |
| std::basic_format_args<std::basic_format_context<OutIt, CharT>> args) { |
| { |
| std::basic_string<CharT> str[3]; |
| std::basic_format_context context = |
| test_format_context_create(OutIt{str[0]}, args); |
| context.out() = CharT('a'); |
| context.advance_to(OutIt{str[1]}); |
| context.out() = CharT('b'); |
| context.advance_to(OutIt{str[2]}); |
| context.out() = CharT('c'); |
| |
| assert(str[0].size() == 1); |
| assert(str[0].front() == CharT('a')); |
| assert(str[1].size() == 1); |
| assert(str[1].front() == CharT('b')); |
| assert(str[2].size() == 1); |
| assert(str[2].front() == CharT('c')); |
| } |
| } |
| |
| void test() { |
| test(std::basic_format_args( |
| std::make_format_args<std::basic_format_context< |
| std::back_insert_iterator<std::basic_string<char>>, char>>())); |
| |
| #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| test(std::basic_format_args( |
| std::make_format_args<std::basic_format_context< |
| std::back_insert_iterator<std::basic_string<wchar_t>>, wchar_t>>())); |
| #endif |
| #ifndef _LIBCPP_HAS_NO_CHAR8_T |
| test(std::basic_format_args( |
| std::make_format_args<std::basic_format_context< |
| std::back_insert_iterator<std::basic_string<char8_t>>, char8_t>>())); |
| #endif |
| #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS |
| test(std::basic_format_args( |
| std::make_format_args<std::basic_format_context< |
| std::back_insert_iterator<std::basic_string<char16_t>>, |
| char16_t>>())); |
| test(std::basic_format_args( |
| std::make_format_args<std::basic_format_context< |
| std::back_insert_iterator<std::basic_string<char32_t>>, |
| char32_t>>())); |
| #endif |
| } |
| |
| int main(int, char**) { |
| test(); |
| |
| return 0; |
| } |