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 1.90.0.
boost::layout_tolerance — Determines when to terminate layout of a particular graph based on a given relative tolerance.
template<typename T = double> struct layout_tolerance {   // construct/copy/destruct   layout_tolerance(const T & = T(0.001));   // public member functions   template<typename Graph>     bool operator()(T,                     typename boost::graph_traits< Graph >::vertex_descriptor,                     const Graph &, bool) ; };