Chapter 10. Boost.ContainerHash

Daniel James

Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

Introduction

boost::hash is an implementation of the hash function object specified by the Draft Technical Report on C++ Library Extensions (TR1). It is the default hash function for Boost.Unordered, Boost.Intrusive's unordered associative containers, and Boost.MultiIndex's hash indicies and Boost.Bimap's unordered_set_of.

As it is compliant with TR1, it will work with:

integers
floats
pointers
strings

It also implements the extension proposed by Peter Dimov in issue 6.18 of the Library Extension Technical Report Issues List (page 63), this adds support for:

arrays
std::pair
the standard containers.
extending boost::hash for custom types.

| | Note | |

This hash function is designed to be used in containers based on the STL and is not suitable as a general purpose hash function. For more details see the rationale.

Last revised: August 05, 2021 at 09:53:44 GMT