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

Construct a buffer with a specified maximum size.

basic_streambuf(
    std::size_t max_size = (std::numeric_limits< std::size_t >::max)(),
    const Allocator & allocator = Allocator());