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
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boost::algorithm::trim_right_if — Right trim - parametric.
// In header: <boost/algorithm/string/trim.hpp> template<typename SequenceT, typename PredicateT> void trim_right_if(SequenceT & Input, PredicateT IsSpace);