NFD » ndn-cxx

In RegexComponentSetMatcher, m_components is a set<shared_ptr<RegexComponentMatcher> > .
https://github.com/named-data/ndn-cxx/blob/18cf81bf6e03fe518b4f2e9d0c02223276be2cf7/src/util/regex/regex-component-set-matcher.hpp#L71

But each added member is a new, different shared_ptr:
https://github.com/named-data/ndn-cxx/blob/18cf81bf6e03fe518b4f2e9d0c02223276be2cf7/src/util/regex/regex-component-set-matcher.hpp#L135

Different shared_ptr always compare unequal, so adding to the set always adds a new member. Therefore, m_components can be a vector, which is more efficient, and less confusing since it really doesn't maintain set behavior.

(This issue is just an observation. You can abandon it if you want.)