74 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++1710// UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME11 12// XFAIL: availability-fp_to_chars-missing13 14// <format>15 16// string vformat(string_view fmt, format_args args);17// wstring vformat(wstring_view fmt, wformat_args args);18 19#include <format>20#include <cassert>21#include <vector>22 23#include "test_macros.h"24#include "format_tests.h"25#include "string_literal.h"26#include "assert_macros.h"27#include "concat_macros.h"28 29auto test = []<class CharT, class... Args>(30 std::basic_string_view<CharT> expected, std::basic_string_view<CharT> fmt, Args&&... args) constexpr {31 std::basic_string<CharT> out = std::vformat(fmt, std::make_format_args<context_t<CharT>>(args...));32 TEST_REQUIRE(out == expected,33 TEST_WRITE_CONCATENATED(34 "\nFormat string ", fmt, "\nExpected output ", expected, "\nActual output ", out, '\n'));35};36 37auto test_exception =38 []<class CharT, class... Args>(39 [[maybe_unused]] std::string_view what,40 [[maybe_unused]] std::basic_string_view<CharT> fmt,41 [[maybe_unused]] Args&&... args) {42 TEST_VALIDATE_EXCEPTION(43 std::format_error,44 [&]([[maybe_unused]] const std::format_error& e) {45 TEST_LIBCPP_REQUIRE(46 e.what() == what,47 TEST_WRITE_CONCATENATED(48 "\nFormat string ", fmt, "\nExpected exception ", what, "\nActual exception ", e.what(), '\n'));49 },50 TEST_IGNORE_NODISCARD std::vformat(fmt, std::make_format_args<context_t<CharT>>(args...)));51 };52 53int main(int, char**) {54#if !defined(TEST_HAS_NO_EXCEPTIONS)55 // reproducer of https://llvm.org/PR6501156 try {57 const char fmt[] = {'{', '0'};58 char buf[4096];59 [[maybe_unused]] auto ignored =60 std::vformat_to(buf, std::string_view{fmt, fmt + sizeof(fmt)}, std::make_format_args());61 } catch (...) {62 }63#endif // !defined(TEST_HAS_NO_EXCEPTIONS)64 65 format_tests<char, execution_modus::full>(test, test_exception);66 67#ifndef TEST_HAS_NO_WIDE_CHARACTERS68 format_tests_char_to_wchar_t(test);69 format_tests<wchar_t, execution_modus::full>(test, test_exception);70#endif71 72 return 0;73}74