std::basic_stringbuf<CharT,Traits,Allocator>::swap
From cppreference.com
< cpp | io | basic stringbuf
void swap( basic_stringbuf& rhs ); |
(since C++11) (until C++20) |
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| void swap( basic_stringbuf& rhs ) noexcept(/* see below */); |
(since C++20) | |
Swaps the state and the contents of *this and rhs.
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The behavior is undefined if |
(since C++11) |
Parameters
| rhs | - | another basic_stringbuf
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Return value
(none)
Exceptions
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May throw implementation-defined exceptions. |
(since C++11) (until C++20) |
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noexcept specification:
noexcept(std::allocator_traits<Allocator>::propagate_on_container_swap::value || std::allocator_traits<Allocator>::is_always_equal::value) |
(since C++20) |
Notes
This function is called automatically when swapping std::stringstream objects. It is rarely necessary to call it directly.
Example
Run this code
#include <iomanip> #include <iostream> #include <sstream> #include <string> int main() { std::istringstream one("one"); std::ostringstream two("two"); std::cout << "Before swap: one = " << std::quoted(one.str()) << ", two = " << std::quoted(two.str()) << ".\n"; one.rdbuf()->swap(*two.rdbuf()); std::cout << "After swap: one = " << std::quoted(one.str()) << ", two = " << std::quoted(two.str()) << ".\n"; }
Output:
Before swap: one = "one", two = "two". After swap: one = "two", two = "one".
See also
constructs a basic_stringbuf object (public member function) | |
| (C++11) |
swaps two string streams (public member function of std::basic_stringstream<CharT,Traits,Allocator>) |