...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::algorithm::all — 'All' predicate
// In header: <boost/algorithm/string/predicate.hpp> template<typename RangeT, typename PredicateT> bool all(const RangeT & Input, PredicateT Pred);