feat():initial version

install/boost_1_75_0/include/boost/filesystem/exception.hpp

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+//  boost/filesystem/exception.hpp  -----------------------------------------------------//
+
+//  Copyright Beman Dawes 2003
+//  Copyright Andrey Semashev 2019
+
+//  Distributed under the Boost Software License, Version 1.0.
+//  See http://www.boost.org/LICENSE_1_0.txt
+
+//  Library home page: http://www.boost.org/libs/filesystem
+
+#ifndef BOOST_FILESYSTEM3_EXCEPTION_HPP
+#define BOOST_FILESYSTEM3_EXCEPTION_HPP
+
+#include <boost/config.hpp>
+
+# if defined( BOOST_NO_STD_WSTRING )
+#   error Configuration not supported: Boost.Filesystem V3 and later requires std::wstring support
+# endif
+
+#include <boost/filesystem/config.hpp>
+#include <boost/filesystem/path.hpp>
+
+#include <string>
+#include <boost/system/error_code.hpp>
+#include <boost/system/system_error.hpp>
+#include <boost/smart_ptr/intrusive_ptr.hpp>
+#include <boost/smart_ptr/intrusive_ref_counter.hpp>
+
+#include <boost/config/abi_prefix.hpp> // must be the last #include
+
+#if defined(BOOST_MSVC)
+#pragma warning(push)
+// 'm_A' : class 'A' needs to have dll-interface to be used by clients of class 'B'
+#pragma warning(disable: 4251)
+// non dll-interface class 'A' used as base for dll-interface class 'B'
+#pragma warning(disable: 4275)
+#endif
+
+namespace boost {
+namespace filesystem {
+
+//--------------------------------------------------------------------------------------//
+//                                                                                      //
+//                            class filesystem_error                                    //
+//                                                                                      //
+//--------------------------------------------------------------------------------------//
+
+class BOOST_FILESYSTEM_DECL filesystem_error :
+  public system::system_error
+{
+  // see http://www.boost.org/more/error_handling.html for design rationale
+
+public:
+  filesystem_error(const std::string& what_arg, system::error_code ec);
+  filesystem_error(const std::string& what_arg, const path& path1_arg, system::error_code ec);
+  filesystem_error(const std::string& what_arg, const path& path1_arg, const path& path2_arg, system::error_code ec);
+
+  filesystem_error(filesystem_error const& that);
+  filesystem_error& operator= (filesystem_error const& that);
+
+  ~filesystem_error() BOOST_NOEXCEPT_OR_NOTHROW;
+
+  const path& path1() const BOOST_NOEXCEPT
+  {
+    return m_imp_ptr.get() ? m_imp_ptr->m_path1 : get_empty_path();
+  }
+  const path& path2() const BOOST_NOEXCEPT
+  {
+    return m_imp_ptr.get() ? m_imp_ptr->m_path2 : get_empty_path();
+  }
+
+  const char* what() const BOOST_NOEXCEPT_OR_NOTHROW BOOST_OVERRIDE;
+
+private:
+  static const path& get_empty_path() BOOST_NOEXCEPT;
+
+private:
+  struct impl :
+    public boost::intrusive_ref_counter< impl >
+  {
+    path         m_path1; // may be empty()
+    path         m_path2; // may be empty()
+    std::string  m_what;  // not built until needed
+
+    BOOST_DEFAULTED_FUNCTION(impl(), {})
+    explicit impl(path const& path1) : m_path1(path1) {}
+    impl(path const& path1, path const& path2) : m_path1(path1), m_path2(path2) {}
+  };
+  boost::intrusive_ptr< impl > m_imp_ptr;
+};
+
+} // namespace filesystem
+} // namespace boost
+
+#if defined(BOOST_MSVC)
+#pragma warning(pop)
+#endif
+
+#include <boost/config/abi_suffix.hpp> // pops abi_prefix.hpp pragmas
+#endif // BOOST_FILESYSTEM3_EXCEPTION_HPP