Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
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Copyright © 2002-2004 Douglas Gregor
Use, modification and distribution is subject to 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)
Table of Contents
The 3-state boolean library contains a single class,
boost::logic::tribool, along with
support functions and operator overloads that implement 3-state
boolean logic.