mirror of
https://git.mirrors.martin98.com/https://github.com/gulrak/filesystem
synced 2025-06-04 11:13:58 +08:00
f08e8b0064
This resolves warnings when compiling with -wundef (and errors when combined with -werror).
61 lines
3.6 KiB
C++
61 lines
3.6 KiB
C++
//---------------------------------------------------------------------------------------
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//
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// ghc::filesystem - A C++17-like filesystem implementation for C++11/C++14
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//
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//---------------------------------------------------------------------------------------
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//
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// Copyright (c) 2018, Steffen Schümann <s.schuemann@pobox.com>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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//---------------------------------------------------------------------------------------
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// fs_std_impl.hpp - The implementation header for the header/implementation separated usage of
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// ghc::filesystem that does nothing if std::filesystem is detected.
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// This file can be used to hide the implementation of ghc::filesystem into a single cpp.
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// The cpp has to include this before including fs_std_fwd.hpp directly or via a different
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// header to work.
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//---------------------------------------------------------------------------------------
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#if defined(_MSVC_LANG) && _MSVC_LANG >= 201703L || __cplusplus >= 201703L && defined(__has_include)
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// ^ Supports MSVC prior to 15.7 without setting /Zc:__cplusplus to fix __cplusplus
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// _MSVC_LANG works regardless. But without the switch, the compiler always reported 199711L: https://blogs.msdn.microsoft.com/vcblog/2018/04/09/msvc-now-correctly-reports-__cplusplus/
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#if __has_include(<filesystem>) // Two stage __has_include needed for MSVC 2015 and per https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005finclude.html
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#define GHC_USE_STD_FS
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// Old Apple OSs don't support std::filesystem, though the header is available at compile
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// time. In particular, std::filesystem is unavailable before macOS 10.15, iOS/tvOS 13.0,
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// and watchOS 6.0.
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#ifdef __APPLE__
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#include <Availability.h>
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// Note: This intentionally uses std::filesystem on any new Apple OS, like visionOS
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// released after std::filesystem, where std::filesystem is always available.
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// (All other __<platform>_VERSION_MIN_REQUIREDs will be undefined and thus 0.)
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#if defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500 \
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|| defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED < 130000 \
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|| defined(__TV_OS_VERSION_MIN_REQUIRED) && __TV_OS_VERSION_MIN_REQUIRED < 130000 \
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|| defined(__WATCH_OS_VERSION_MAX_ALLOWED) && __WATCH_OS_VERSION_MAX_ALLOWED < 60000
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#undef GHC_USE_STD_FS
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#endif
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#endif
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#endif
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#endif
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#ifndef GHC_USE_STD_FS
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#include "fs_impl.hpp"
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#endif
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