| //===----------------------------------------------------------------------===// |
| // 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: GCC-ALWAYS_INLINE-FIXME |
| |
| // XFAIL: availability-fp_to_chars-missing |
| |
| // <format> |
| |
| // template<class Out> |
| // Out vformat_to(Out out, string_view fmt, format_args args); |
| // template<class Out> |
| // Out vformat_to(Out out, wstring_view fmt, wformat_args_t args); |
| |
| #include <format> |
| #include <algorithm> |
| #include <cassert> |
| #include <list> |
| #include <vector> |
| |
| #include "assert_macros.h" |
| #include "concat_macros.h" |
| #include "test_macros.h" |
| #include "format_tests.h" |
| #include "string_literal.h" |
| |
| auto test = []<class CharT, class... Args>( |
| std::basic_string_view<CharT> expected, std::basic_string_view<CharT> fmt, Args&&... args) constexpr { |
| { |
| std::basic_string<CharT> out(expected.size(), CharT(' ')); |
| auto it = std::vformat_to(out.begin(), fmt, std::make_format_args<context_t<CharT>>(args...)); |
| assert(it == out.end()); |
| assert(out == expected); |
| } |
| { |
| std::list<CharT> out; |
| std::vformat_to(std::back_inserter(out), fmt, std::make_format_args<context_t<CharT>>(args...)); |
| assert(std::equal(out.begin(), out.end(), expected.begin(), expected.end())); |
| } |
| { |
| std::vector<CharT> out; |
| std::vformat_to(std::back_inserter(out), fmt, std::make_format_args<context_t<CharT>>(args...)); |
| assert(std::equal(out.begin(), out.end(), expected.begin(), expected.end())); |
| } |
| { |
| assert(expected.size() < 4096 && "Update the size of the buffer."); |
| CharT out[4096]; |
| CharT* it = std::vformat_to(out, fmt, std::make_format_args<context_t<CharT>>(args...)); |
| assert(std::distance(out, it) == int(expected.size())); |
| // Convert to std::string since output contains '\0' for boolean tests. |
| assert(std::basic_string<CharT>(out, it) == expected); |
| } |
| }; |
| |
| auto test_exception = |
| []<class CharT, class... Args>( |
| [[maybe_unused]] std::string_view what, |
| [[maybe_unused]] std::basic_string_view<CharT> fmt, |
| [[maybe_unused]] Args&&... args) { |
| TEST_VALIDATE_EXCEPTION( |
| std::format_error, |
| [&]([[maybe_unused]] const std::format_error& e) { |
| TEST_LIBCPP_REQUIRE( |
| e.what() == what, |
| TEST_WRITE_CONCATENATED( |
| "\nFormat string ", fmt, "\nExpected exception ", what, "\nActual exception ", e.what(), '\n')); |
| }, |
| [&] { |
| std::basic_string<CharT> out; |
| std::vformat_to(std::back_inserter(out), fmt, std::make_format_args<context_t<CharT>>(args...)); |
| }()); |
| }; |
| |
| int main(int, char**) { |
| format_tests<char, execution_modus::partial>(test, test_exception); |
| |
| #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| format_tests_char_to_wchar_t(test); |
| format_tests<wchar_t, execution_modus::partial>(test, test_exception); |
| #endif |
| |
| return 0; |
| } |