Standard library header <strstream> (deprecated in C++98)(removed in C++26)

This header is part of the Input/Output library.

# Notes

is deprecated in C++98 and removed in C++26 (see P2867R1).

The reason for removal is that C++20 and C++23 provide superior replacement facilities, such as the ability to move strings efficiently out of std::stringstreams (since C++20, see P0408R7), and the library (since C++23, see P0448R4).