std::basic_fstream<CharT,Traits>::native_handle

native_handle_type native_handle() const noexcept;		(since C++26)

Returns the implementation defined underlying handle associated with basic_filebuf. The behavior is undefined if is_open() is false.

rdbuf()->native_handle()

Feature-test macro	Value	Std	Comment
`__cpp_lib_fstream_native_handle`	202306L	(C++26)	native handles support

Compiler support
Freestanding and hosted
Language
Standard library
Standard library headers
Named requirements
Feature test macros (C++20)
Language support library
Concepts library (C++20)
Metaprogramming library (C++11)
Diagnostics library
General utilities library
Strings library
Containers library
Iterators library
Ranges library (C++20)
Algorithms library
Numerics library
Localizations library
Input/output library
Filesystem library (C++17)
Regular expressions library (C++11)
Concurrency support library (C++11)
Technical specifications
Symbols index
External libraries

I/O manipulators
Print functions (C++23)
C-style I/O
Buffers
basic_streambuf
basic_filebuf
basic_stringbuf
basic_spanbuf (C++23)
strstreambuf (deprecated in C++98)
basic_syncbuf (C++20)
Streams
Abstractions
ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
File I/O
basic_ifstream
basic_ofstream
basic_fstream
String I/O
basic_istringstream
basic_ostringstream
basic_stringstream
Array I/O
basic_ispanstream (C++23)
basic_ospanstream (C++23)
basic_spanstream (C++23)
istrstream (deprecated in C++98)
ostrstream (deprecated in C++98)
strstream (deprecated in C++98)
Synchronized Output
basic_osyncstream (C++20)
Types
streamoff
streamsize
fpos
Error category interface
iostream_category (C++11)
io_errc (C++11)

Member functions
basic_fstream::basic_fstream
basic_fstream::operator= (C++11)
basic_fstream::swap (C++11)
basic_fstream::rdbuf
basic_fstream::native_handle (C++26)
File operations
basic_fstream::is_open
basic_fstream::open
basic_fstream::close
Non-member functions
swap(std::basic_fstream) (C++11)