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 2013. The current version is 1.89.0.
All of the integer types in this library can be used as template arguments
to boost::rational<IntType>.
Note that using the library in this way largely negates the effect of the
expression templates in number.