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 the documentation for a snapshot of the develop branch, built from commit a0e8f51d19.

Struct template zero_or_default

boost::numeric::zero_or_default

// In header: <boost/accumulators/numeric/functional.hpp>

template<typename T> 
struct zero_or_default : public mpl::if_::type {
};