Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
This is an older version of Boost and was released in 2018. The current version is 1.90.0.
Get a list of buffers that represents the output sequence, with the given size.
mutable_buffers_type prepare( size_type n);
Buffers representing the input sequence acquired prior to this call remain valid.