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 1.89.0.

basic_streambuf::capacity

basic_streambuf::capacity

Get the current capacity of the basic_streambuf.

std::size_t capacity() const;

Return Value

The current total capacity of the streambuf, i.e. for both the input sequence and output sequence.