Merge pull request #167 from cpsauer/dynamic-selection-more-apple-platforms

This commit is contained in:
gulrak 2023-07-30 19:40:45 +02:00 committed by GitHub
commit 144954ff4e
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 256 additions and 171 deletions

213
README.md
View File

@ -176,60 +176,83 @@ Everything is in the namespace `ghc::filesystem`, so one way to use it only as
a fallback could be:
```cpp
#ifdef __APPLE__
#include <Availability.h> // for deployment target to support pre-catalina targets without std::fs
#if _MSVC_LANG >= 201703L || __cplusplus >= 201703L && defined(__has_include)
// ^ Supports MSVC prior to 15.7 without setting /Zc:__cplusplus to fix __cplusplus
// _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/
#if __has_include(<filesystem>) // Two stage __has_include needed for MSVC 2015 and per https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005finclude.html
#define GHC_USE_STD_FS
// Old Apple OSs don't support std::filesystem, though the header is available at compile
// time. In particular, std::filesystem is unavailable before macOS 10.15, iOS/tvOS 13.0,
// and watchOS 6.0.
#ifdef __APPLE__
#include <Availability.h>
// Note: This intentionally uses std::filesystem on any new Apple OS, like visionOS
// released after std::filesystem, where std::filesystem is always available.
// (All other __<platform>_VERSION_MIN_REQUIREDs will be undefined and thus 0.)
#if __MAC_OS_X_VERSION_MIN_REQUIRED && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500 \
|| __IPHONE_OS_VERSION_MIN_REQUIRED && __IPHONE_OS_VERSION_MIN_REQUIRED < 130000 \
|| __TV_OS_VERSION_MIN_REQUIRED && __TV_OS_VERSION_MIN_REQUIRED < 130000 \
|| __WATCH_OS_VERSION_MAX_ALLOWED && __WATCH_OS_VERSION_MAX_ALLOWED < 60000
#undef GHC_USE_STD_FS
#endif
#endif
#endif
#endif
#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
#if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
#define GHC_USE_STD_FS
#include <filesystem>
namespace fs = std::filesystem;
#endif
#endif
#ifndef GHC_USE_STD_FS
#include <ghc/filesystem.hpp>
namespace fs = ghc::filesystem;
#ifdef GHC_USE_STD_FS
#include <filesystem>
namespace fs = std::filesystem;
#else
#include "filesystem.hpp"
namespace fs = ghc::filesystem;
#endif
```
**Note that this code uses a two-stage preprocessor condition because Visual Studio 2015
doesn't like the `(<...>)` syntax, even if it could cut evaluation early before. This code also
used the minimum deployment target to detect if `std::filesystem` really is available on macOS
compilation.**
**Note also, this detection now works on MSVC versions prior to 15.7 on, or without setting
the `/Zc:__cplusplus` compile switch that would fix `__cplusplus` on MSVC. (Without the switch
the compiler always reports `199711L`
([see](https://blogs.msdn.microsoft.com/vcblog/2018/04/09/msvc-now-correctly-reports-__cplusplus/)),
but `_MSVC_LANG` works without it.**
If you want to also use the `fstream` wrapper with `path` support as fallback,
you might use:
```cpp
#ifdef __APPLE__
#include <Availability.h> // for deployment target to support pre-catalina targets without std::fs
#if _MSVC_LANG >= 201703L || __cplusplus >= 201703L && defined(__has_include)
// ^ Supports MSVC prior to 15.7 without setting /Zc:__cplusplus to fix __cplusplus
// _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/
#if __has_include(<filesystem>) // Two stage __has_include needed for MSVC 2015 and per https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005finclude.html
#define GHC_USE_STD_FS
// Old Apple OSs don't support std::filesystem, though the header is available at compile
// time. In particular, std::filesystem is unavailable before macOS 10.15, iOS/tvOS 13.0,
// and watchOS 6.0.
#ifdef __APPLE__
#include <Availability.h>
// Note: This intentionally uses std::filesystem on any new Apple OS, like visionOS
// released after std::filesystem, where std::filesystem is always available.
// (All other __<platform>_VERSION_MIN_REQUIREDs will be undefined and thus 0.)
#if __MAC_OS_X_VERSION_MIN_REQUIRED && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500 \
|| __IPHONE_OS_VERSION_MIN_REQUIRED && __IPHONE_OS_VERSION_MIN_REQUIRED < 130000 \
|| __TV_OS_VERSION_MIN_REQUIRED && __TV_OS_VERSION_MIN_REQUIRED < 130000 \
|| __WATCH_OS_VERSION_MAX_ALLOWED && __WATCH_OS_VERSION_MAX_ALLOWED < 60000
#undef GHC_USE_STD_FS
#endif
#endif
#endif
#endif
#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
#if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
#define GHC_USE_STD_FS
#include <filesystem>
namespace fs {
using namespace std::filesystem;
using ifstream = std::ifstream;
using ofstream = std::ofstream;
using fstream = std::fstream;
}
#endif
#endif
#ifndef GHC_USE_STD_FS
#include <ghc/filesystem.hpp>
namespace fs {
using namespace ghc::filesystem;
using ifstream = ghc::filesystem::ifstream;
using ofstream = ghc::filesystem::ofstream;
using fstream = ghc::filesystem::fstream;
}
#ifdef GHC_USE_STD_FS
#include <filesystem>
namespace fs {
using namespace std::filesystem;
using ifstream = std::ifstream;
using ofstream = std::ofstream;
using fstream = std::fstream;
}
#else
#include "filesystem.hpp"
namespace fs {
using namespace ghc::filesystem;
using ifstream = ghc::filesystem::ifstream;
using ofstream = ghc::filesystem::ofstream;
using fstream = ghc::filesystem::fstream;
}
#endif
```
@ -269,29 +292,46 @@ If you use the forwarding/implementation approach, you can still use the dynamic
switching like this:
```cpp
#ifdef __APPLE__
#include <Availability.h> // for deployment target to support pre-catalina targets without std::fs
#if _MSVC_LANG >= 201703L || __cplusplus >= 201703L && defined(__has_include)
// ^ Supports MSVC prior to 15.7 without setting /Zc:__cplusplus to fix __cplusplus
// _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/
#if __has_include(<filesystem>) // Two stage __has_include needed for MSVC 2015 and per https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005finclude.html
#define GHC_USE_STD_FS
// Old Apple OSs don't support std::filesystem, though the header is available at compile
// time. In particular, std::filesystem is unavailable before macOS 10.15, iOS/tvOS 13.0,
// and watchOS 6.0.
#ifdef __APPLE__
#include <Availability.h>
// Note: This intentionally uses std::filesystem on any new Apple OS, like visionOS
// released after std::filesystem, where std::filesystem is always available.
// (All other __<platform>_VERSION_MIN_REQUIREDs will be undefined and thus 0.)
#if __MAC_OS_X_VERSION_MIN_REQUIRED && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500 \
|| __IPHONE_OS_VERSION_MIN_REQUIRED && __IPHONE_OS_VERSION_MIN_REQUIRED < 130000 \
|| __TV_OS_VERSION_MIN_REQUIRED && __TV_OS_VERSION_MIN_REQUIRED < 130000 \
|| __WATCH_OS_VERSION_MAX_ALLOWED && __WATCH_OS_VERSION_MAX_ALLOWED < 60000
#undef GHC_USE_STD_FS
#endif
#endif
#endif
#endif
#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
#if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
#define GHC_USE_STD_FS
#include <filesystem>
namespace fs {
using namespace std::filesystem;
using ifstream = std::ifstream;
using ofstream = std::ofstream;
using fstream = std::fstream;
}
#endif
#endif
#ifndef GHC_USE_STD_FS
#include <ghc/fs-fwd.hpp>
namespace fs {
using namespace ghc::filesystem;
using ifstream = ghc::filesystem::ifstream;
using ofstream = ghc::filesystem::ofstream;
using fstream = ghc::filesystem::fstream;
}
#ifdef GHC_USE_STD_FS
#include <filesystem>
namespace fs {
using namespace std::filesystem;
using ifstream = std::ifstream;
using ofstream = std::ofstream;
using fstream = std::fstream;
}
#else
#include "fs_fwd.hpp"
namespace fs {
using namespace ghc::filesystem;
using ifstream = ghc::filesystem::ifstream;
using ofstream = ghc::filesystem::ofstream;
using fstream = ghc::filesystem::fstream;
}
#endif
```
@ -299,25 +339,38 @@ and in the implementation hiding cpp, you might use (before any include that inc
to take precedence:
```cpp
#ifdef __APPLE__ // for deployment target to support pre-catalina targets without std::fs
#include <Availability.h>
#endif
#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
#if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
#define GHC_USE_STD_FS
#endif
#if _MSVC_LANG >= 201703L || __cplusplus >= 201703L && defined(__has_include)
// ^ Supports MSVC prior to 15.7 without setting /Zc:__cplusplus to fix __cplusplus
// _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/
#if __has_include(<filesystem>) // Two stage __has_include needed for MSVC 2015 and per https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005finclude.html
#define GHC_USE_STD_FS
// Old Apple OSs don't support std::filesystem, though the header is available at compile
// time. In particular, std::filesystem is unavailable before macOS 10.15, iOS/tvOS 13.0,
// and watchOS 6.0.
#ifdef __APPLE__
#include <Availability.h>
// Note: This intentionally uses std::filesystem on any new Apple OS, like visionOS
// released after std::filesystem, where std::filesystem is always available.
// (All other __<platform>_VERSION_MIN_REQUIREDs will be undefined and thus 0.)
#if __MAC_OS_X_VERSION_MIN_REQUIRED && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500 \
|| __IPHONE_OS_VERSION_MIN_REQUIRED && __IPHONE_OS_VERSION_MIN_REQUIRED < 130000 \
|| __TV_OS_VERSION_MIN_REQUIRED && __TV_OS_VERSION_MIN_REQUIRED < 130000 \
|| __WATCH_OS_VERSION_MAX_ALLOWED && __WATCH_OS_VERSION_MAX_ALLOWED < 60000
#undef GHC_USE_STD_FS
#endif
#endif
#endif
#endif
#ifndef GHC_USE_STD_FS
#define GHC_FILESYSTEM_IMPLEMENTATION
#include <ghc/filesystem.hpp>
#include "fs_impl.hpp"
#endif
```
:information_source: **Hint:** There are additional helper headers, named `ghc/fs_std_fwd.hpp` and
`ghc/fs_std_impl.hpp` that use this technique, so you can simply include them
if you want to dynamically select the filesystem implementation. they also
enable the `wchar_t` support on `ghc::filesystem` on Windows, so the resulting
implementation in the `fs` namespace will be compatible.
if you want to dynamically select the filesystem implementation.
@ -409,7 +462,7 @@ int main(int argc, char* argv[])
exit(EXIT_FAILURE);
}
// now use argc/argv as usual, they have utf-8 enconding on windows
// now use argc/argv as usual, they have utf-8 encoding on windows
// ...
return 0;

View File

@ -25,23 +25,6 @@
// SOFTWARE.
//
//---------------------------------------------------------------------------------------
//
// To dynamically select std::filesystem where available on most platforms,
// you could use:
//
// #if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
// #if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
// #define GHC_USE_STD_FS
// #include <filesystem>
// namespace fs = std::filesystem;
// #endif
// #endif
// #ifndef GHC_USE_STD_FS
// #include <ghc/filesystem.hpp>
// namespace fs = ghc::filesystem;
// #endif
//
//---------------------------------------------------------------------------------------
#ifndef GHC_FILESYSTEM_H
#define GHC_FILESYSTEM_H
@ -53,7 +36,7 @@
#ifndef GHC_OS_DETECTED
#if defined(__APPLE__) && defined(__MACH__)
#define GHC_OS_MACOS
#define GHC_OS_APPLE
#elif defined(__linux__)
#define GHC_OS_LINUX
#if defined(__ANDROID__)
@ -181,7 +164,7 @@
#include <langinfo.h>
#endif
#endif
#ifdef GHC_OS_MACOS
#ifdef GHC_OS_APPLE
#include <Availability.h>
#endif
@ -4650,9 +4633,11 @@ GHC_INLINE void last_write_time(const path& p, file_time_type new_time, std::err
if (!::SetFileTime(file.get(), 0, 0, &ft)) {
ec = detail::make_system_error();
}
#elif defined(GHC_OS_MACOS) && \
(__MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_13) || (__IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_11_0) || \
(__TV_OS_VERSION_MIN_REQUIRED < __TVOS_11_0) || (__WATCH_OS_VERSION_MIN_REQUIRED < __WATCHOS_4_0)
#elif defined(GHC_OS_APPLE) && \
(__MAC_OS_X_VERSION_MIN_REQUIRED && __MAC_OS_X_VERSION_MIN_REQUIRED < 101300 \
|| __IPHONE_OS_VERSION_MIN_REQUIRED && __IPHONE_OS_VERSION_MIN_REQUIRED < 110000 \
|| __TV_OS_VERSION_MIN_REQUIRED && __TVOS_VERSION_MIN_REQUIRED < 110000 \
|| __WATCH_OS_VERSION_MIN_REQUIRED && __WATCHOS_VERSION_MIN_REQUIRED < 40000)
struct ::stat fs;
if (::stat(p.c_str(), &fs) == 0) {
struct ::timeval tv[2];

View File

@ -25,7 +25,7 @@
// SOFTWARE.
//
//---------------------------------------------------------------------------------------
// fs_fwd.hpp - The forwarding header for the header/implementation seperated usage of
// fs_fwd.hpp - The forwarding header for the header/implementation separated usage of
// ghc::filesystem.
// This file can be include at any place, where ghc::filesystem api is needed while
// not bleeding implementation details (e.g. system includes) into the global namespace,
@ -34,5 +34,5 @@
#ifndef GHC_FILESYSTEM_FWD_H
#define GHC_FILESYSTEM_FWD_H
#define GHC_FILESYSTEM_FWD
#include <ghc/filesystem.hpp>
#include "filesystem.hpp"
#endif // GHC_FILESYSTEM_FWD_H

View File

@ -25,11 +25,11 @@
// SOFTWARE.
//
//---------------------------------------------------------------------------------------
// fs_impl.hpp - The implementation header for the header/implementation seperated usage of
// fs_impl.hpp - The implementation header for the header/implementation separated usage of
// ghc::filesystem.
// This file can be used to hide the implementation of ghc::filesystem into a single cpp.
// The cpp has to include this before including fs_fwd.hpp directly or via a different
// header to work.
//---------------------------------------------------------------------------------------
#define GHC_FILESYSTEM_IMPLEMENTATION
#include <ghc/filesystem.hpp>
#include "filesystem.hpp"

View File

@ -31,30 +31,47 @@
//---------------------------------------------------------------------------------------
#ifndef GHC_FILESYSTEM_STD_H
#define GHC_FILESYSTEM_STD_H
#if defined(__APPLE__)
#include <Availability.h>
#endif
#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
#if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
#define GHC_USE_STD_FS
#include <filesystem>
namespace fs {
using namespace std::filesystem;
using ifstream = std::ifstream;
using ofstream = std::ofstream;
using fstream = std::fstream;
}
#endif
#endif
#ifndef GHC_USE_STD_FS
//#define GHC_WIN_DISABLE_WSTRING_STORAGE_TYPE
#include <ghc/filesystem.hpp>
namespace fs {
using namespace ghc::filesystem;
using ifstream = ghc::filesystem::ifstream;
using ofstream = ghc::filesystem::ofstream;
using fstream = ghc::filesystem::fstream;
}
#endif
#endif // GHC_FILESYSTEM_STD_H
#if _MSVC_LANG >= 201703L || __cplusplus >= 201703L && defined(__has_include)
// ^ Supports MSVC prior to 15.7 without setting /Zc:__cplusplus to fix __cplusplus
// _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/
#if __has_include(<filesystem>) // Two stage __has_include needed for MSVC 2015 and per https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005finclude.html
#define GHC_USE_STD_FS
// Old Apple OSs don't support std::filesystem, though the header is available at compile
// time. In particular, std::filesystem is unavailable before macOS 10.15, iOS/tvOS 13.0,
// and watchOS 6.0.
#ifdef __APPLE__
#include <Availability.h>
// Note: This intentionally uses std::filesystem on any new Apple OS, like visionOS
// released after std::filesystem, where std::filesystem is always available.
// (All other __<platform>_VERSION_MIN_REQUIREDs will be undefined and thus 0.)
#if __MAC_OS_X_VERSION_MIN_REQUIRED && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500 \
|| __IPHONE_OS_VERSION_MIN_REQUIRED && __IPHONE_OS_VERSION_MIN_REQUIRED < 130000 \
|| __TV_OS_VERSION_MIN_REQUIRED && __TV_OS_VERSION_MIN_REQUIRED < 130000 \
|| __WATCH_OS_VERSION_MAX_ALLOWED && __WATCH_OS_VERSION_MAX_ALLOWED < 60000
#undef GHC_USE_STD_FS
#endif
#endif
#endif
#endif
#ifdef GHC_USE_STD_FS
#include <filesystem>
namespace fs {
using namespace std::filesystem;
using ifstream = std::ifstream;
using ofstream = std::ofstream;
using fstream = std::fstream;
}
#else
#include "filesystem.hpp"
namespace fs {
using namespace ghc::filesystem;
using ifstream = ghc::filesystem::ifstream;
using ofstream = ghc::filesystem::ofstream;
using fstream = ghc::filesystem::fstream;
}
#endif
#endif // GHC_FILESYSTEM_STD_H

View File

@ -25,7 +25,7 @@
// SOFTWARE.
//
//---------------------------------------------------------------------------------------
// fs_std_fwd.hpp - The forwarding header for the header/implementation seperated usage of
// fs_std_fwd.hpp - The forwarding header for the header/implementation separated usage of
// ghc::filesystem that uses std::filesystem if it detects it.
// This file can be include at any place, where fs::filesystem api is needed while
// not bleeding implementation details (e.g. system includes) into the global namespace,
@ -33,31 +33,47 @@
//---------------------------------------------------------------------------------------
#ifndef GHC_FILESYSTEM_STD_FWD_H
#define GHC_FILESYSTEM_STD_FWD_H
#if defined(__APPLE__)
#include <Availability.h>
#endif
#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
#if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
#define GHC_USE_STD_FS
#include <filesystem>
namespace fs {
using namespace std::filesystem;
using ifstream = std::ifstream;
using ofstream = std::ofstream;
using fstream = std::fstream;
}
#endif
#endif
#ifndef GHC_USE_STD_FS
//#define GHC_WIN_DISABLE_WSTRING_STORAGE_TYPE
#define GHC_FILESYSTEM_FWD
#include <ghc/filesystem.hpp>
namespace fs {
using namespace ghc::filesystem;
using ifstream = ghc::filesystem::ifstream;
using ofstream = ghc::filesystem::ofstream;
using fstream = ghc::filesystem::fstream;
}
#endif
#endif // GHC_FILESYSTEM_STD_FWD_H
#if _MSVC_LANG >= 201703L || __cplusplus >= 201703L && defined(__has_include)
// ^ Supports MSVC prior to 15.7 without setting /Zc:__cplusplus to fix __cplusplus
// _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/
#if __has_include(<filesystem>) // Two stage __has_include needed for MSVC 2015 and per https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005finclude.html
#define GHC_USE_STD_FS
// Old Apple OSs don't support std::filesystem, though the header is available at compile
// time. In particular, std::filesystem is unavailable before macOS 10.15, iOS/tvOS 13.0,
// and watchOS 6.0.
#ifdef __APPLE__
#include <Availability.h>
// Note: This intentionally uses std::filesystem on any new Apple OS, like visionOS
// released after std::filesystem, where std::filesystem is always available.
// (All other __<platform>_VERSION_MIN_REQUIREDs will be undefined and thus 0.)
#if __MAC_OS_X_VERSION_MIN_REQUIRED && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500 \
|| __IPHONE_OS_VERSION_MIN_REQUIRED && __IPHONE_OS_VERSION_MIN_REQUIRED < 130000 \
|| __TV_OS_VERSION_MIN_REQUIRED && __TV_OS_VERSION_MIN_REQUIRED < 130000 \
|| __WATCH_OS_VERSION_MAX_ALLOWED && __WATCH_OS_VERSION_MAX_ALLOWED < 60000
#undef GHC_USE_STD_FS
#endif
#endif
#endif
#endif
#ifdef GHC_USE_STD_FS
#include <filesystem>
namespace fs {
using namespace std::filesystem;
using ifstream = std::ifstream;
using ofstream = std::ofstream;
using fstream = std::fstream;
}
#else
#include "fs_fwd.hpp"
namespace fs {
using namespace ghc::filesystem;
using ifstream = ghc::filesystem::ifstream;
using ofstream = ghc::filesystem::ofstream;
using fstream = ghc::filesystem::fstream;
}
#endif
#endif // GHC_FILESYSTEM_STD_FWD_H

View File

@ -25,22 +25,36 @@
// SOFTWARE.
//
//---------------------------------------------------------------------------------------
// fs_std_impl.hpp - The implementation header for the header/implementation seperated usage of
// fs_std_impl.hpp - The implementation header for the header/implementation separated usage of
// ghc::filesystem that does nothing if std::filesystem is detected.
// This file can be used to hide the implementation of ghc::filesystem into a single cpp.
// The cpp has to include this before including fs_std_fwd.hpp directly or via a different
// header to work.
//---------------------------------------------------------------------------------------
#if defined(__APPLE__)
#include <Availability.h>
#endif
#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
#if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
#define GHC_USE_STD_FS
#endif
#if _MSVC_LANG >= 201703L || __cplusplus >= 201703L && defined(__has_include)
// ^ Supports MSVC prior to 15.7 without setting /Zc:__cplusplus to fix __cplusplus
// _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/
#if __has_include(<filesystem>) // Two stage __has_include needed for MSVC 2015 and per https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005finclude.html
#define GHC_USE_STD_FS
// Old Apple OSs don't support std::filesystem, though the header is available at compile
// time. In particular, std::filesystem is unavailable before macOS 10.15, iOS/tvOS 13.0,
// and watchOS 6.0.
#ifdef __APPLE__
#include <Availability.h>
// Note: This intentionally uses std::filesystem on any new Apple OS, like visionOS
// released after std::filesystem, where std::filesystem is always available.
// (All other __<platform>_VERSION_MIN_REQUIREDs will be undefined and thus 0.)
#if __MAC_OS_X_VERSION_MIN_REQUIRED && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500 \
|| __IPHONE_OS_VERSION_MIN_REQUIRED && __IPHONE_OS_VERSION_MIN_REQUIRED < 130000 \
|| __TV_OS_VERSION_MIN_REQUIRED && __TV_OS_VERSION_MIN_REQUIRED < 130000 \
|| __WATCH_OS_VERSION_MAX_ALLOWED && __WATCH_OS_VERSION_MAX_ALLOWED < 60000
#undef GHC_USE_STD_FS
#endif
#endif
#endif
#endif
#ifndef GHC_USE_STD_FS
//#define GHC_WIN_DISABLE_WSTRING_STORAGE_TYPE
#define GHC_FILESYSTEM_IMPLEMENTATION
#include <ghc/filesystem.hpp>
#include "fs_impl.hpp"
#endif