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a3f17ba3fe
This patch brings std::ios_base::noreplace from P2467R1 to libc++. This requires compiling the shared library in C++23 mode since otherwise fstream::open(...) doesn't know about the new flag. Differential Revision: https://reviews.llvm.org/D137640 Co-authored-by: Louis Dionne <ldionne.2@gmail.com>
100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <fstream>
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// template <class charT, class traits = char_traits<charT> >
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// class basic_fstream
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// explicit basic_fstream(const char* s, ios_base::openmode mode = ios_base::in | ios_base::out);
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// XFAIL: LIBCXX-AIX-FIXME
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#include <fstream>
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#include <cassert>
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#include "test_macros.h"
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#include "platform_support.h"
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int main(int, char**)
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{
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std::string temp = get_temp_file_name();
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{
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std::fstream fs(temp.c_str(), std::ios_base::in | std::ios_base::out
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| std::ios_base::trunc);
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double x = 0;
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fs << 3.25;
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fs.seekg(0);
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fs >> x;
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assert(x == 3.25);
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}
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std::remove(temp.c_str());
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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{
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std::wfstream fs(temp.c_str(), std::ios_base::in | std::ios_base::out
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| std::ios_base::trunc);
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double x = 0;
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fs << 3.25;
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fs.seekg(0);
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fs >> x;
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assert(x == 3.25);
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}
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std::remove(temp.c_str());
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#endif
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#if TEST_STD_VER >= 23
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// Test all the noreplace flag combinations
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{
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std::ios_base::openmode modes[] = {
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std::ios_base::out | std::ios_base::noreplace,
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std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace,
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std::ios_base::in | std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace,
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std::ios_base::out | std::ios_base::noreplace | std::ios_base::binary,
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std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace | std::ios_base::binary,
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std::ios_base::in | std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace |
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std::ios_base::binary,
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};
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for (auto mode : modes) {
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std::string tmp = get_temp_file_name(); // also creates the file
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{
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std::fstream f(tmp.c_str(), mode);
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assert(!f.is_open()); // since it already exists
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}
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{
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std::remove(tmp.c_str());
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std::fstream f(tmp.c_str(), mode);
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assert(f.is_open()); // since it doesn't exist
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}
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}
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# ifndef TEST_HAS_NO_WIDE_CHARACTERS
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for (auto mode : modes) {
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std::string tmp = get_temp_file_name(); // also creates the file
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{
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std::wfstream f(tmp.c_str(), mode);
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assert(!f.is_open()); // since it already exists
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}
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{
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std::remove(tmp.c_str());
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std::wfstream f(tmp.c_str(), mode);
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assert(f.is_open()); // since it doesn't exist
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}
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}
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# endif
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}
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#endif // TEST_STD_VER >= 23
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return 0;
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}
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