std::swap(std::basic_ofstream)
From cppreference.com
< cpp | io | basic ofstream
C++
Input/output library
| I/O manipulators | ||||
| Print functions (C++23) | ||||
| C-style I/O | ||||
| Buffers | ||||
(C++23) | ||||
(C++98/26*) | ||||
(C++20) | ||||
| Streams | ||||
| Abstractions | ||||
| File I/O | ||||
| String I/O | ||||
| Array I/O | ||||
(C++23) | ||||
(C++23) | ||||
(C++23) | ||||
(C++98/26*) | ||||
(C++98/26*) | ||||
(C++98/26*) | ||||
| Synchronized Output | ||||
(C++20) | ||||
| Types | ||||
| Error category interface | ||||
(C++11) | ||||
(C++11) |
std::basic_ofstream
| Member functions | ||||
(C++11) | ||||
(C++11) | ||||
| File operations | ||||
| Non-member functions | ||||
swap(std::basic_ofstream) (C++11) |
| template< class CharT, class Traits > void swap( basic_ofstream<CharT, Traits>& lhs, basic_ofstream<CharT, Traits>& rhs ); |
|
Specializes the std::swap algorithm for std::basic_ofstream. Exchanges the state of lhs with that of rhs. Effectively calls lhs.swap(rhs).
Contents |
[edit] Parameters
| lhs, rhs | - | streams whose state to swap |
[edit] Return value
(none)
[edit] Exceptions
May throw implementation-defined exceptions.
[edit] Example
Run this code
#include <fstream> #include <iostream> #include <string> bool create_stream(std::ofstream& fs) { try { std::string some_name = "/tmp/test_file.txt"; std::ios_base::openmode some_flags = fs.trunc; / | other flags if (std::ofstream ts{some_name, some_flags}; ts.is_open() { std::swap(ts, fs); / stream objects are not copyable => swap return true; } } catch (...) { std::cout << "Exception!\n"; } return false; } int main() { if (std::ofstream fs; create_stream(fs)) { / use fs stream } }
[edit] See also
| (C++11) |
swaps two file streams (public member function) [edit] |
