#define _USE_STD_FILESYSTEM
#ifdef _USE_STD_FILESYSTEM
#include
#if _HAS_CXX17
#include
namespace fs = std::filesystem;
//using namespace std::filesystem;
#else
#define _SILENCE_EXPERIMENTAL_FILESYSTEM_DEPRECATION_WARNING
#include
namespace fs = std::experimental::filesystem;
//using namespace std::experimental::filesystem;
#endif //!_HAS_CXX17
#else
#include
namespace fs = boost::filesystem;
//using namespace boost::filesystem;
#endif //!_USE_STD_FILESYSTEM
int main()
{
fs::path p("d:/test/a.log");
fs::exists(p);
return 0;
}
1.如果使用msvc默认设置
#include
2.如果 c/c++ ==> 语言 ,更改c++语言标准
#include
完整头文件 CompatibleFileSystem.h
注意
#define _SILENCE_EXPERIMENTAL_FILESYSTEM_DEPRECATION_WARNING
#include
#ifndef COMPATIBLEFILESYSTEM_H_123_
#define COMPATIBLEFILESYSTEM_H_123_
#if defined (_MSC_VER) && (_MSC_VER >= 1020)
#pragma once
#endif
#ifndef _USE_BOOST_FILESYSTEM
#include
#if _HAS_CXX17
#include
namespace fs = std::filesystem;
//using namespace std::filesystem;
#else
#define _SILENCE_EXPERIMENTAL_FILESYSTEM_DEPRECATION_WARNING
#include
namespace fs = std::experimental::filesystem;
//using namespace std::experimental::filesystem;
#endif //!_HAS_CXX17
#else
#include
namespace fs = boost::filesystem;
//using namespace boost::filesystem;
#endif //!_USE_STD_FILESYSTEM
#endif // !COMPATIBLEFILESYSTEM_H_123_