The organization of boost integer headers and classes is designed to take advantage of <stdint.h> types from the 1999 C standard without resorting to undefined behavior in terms of the 1998 C++ standard. The header <boost/cstdint.hpp> makes the standard integer types safely available in namespace boost without placing any names in namespace std.

An STL-compatible hash function object that can be extended to hash user defined types.

Function object wrappers for deferred calls or callbacks.

Regular expression library.

Safe, generic, stack-based discriminated union container.

Serialization for persistence and marshalling.

LL parser framework represents parsers directly as EBNF grammars in inlined C++.

General literal text conversions, such as an int represented a string, or vice-versa.

Useful time utilities. C++11.

A rational number class.

Memory pool management.