flyweight

Giriş
Açıklaması şöyle

Boost.Flyweight makes it easy to use this common programming idiom by providing the class template flyweight<T>, which acts as a drop-in replacement for const T.

Tanımlama 
Şöyle yaparız

boost::flyweights::flyweight<Foo>;

Şöyle yaparız

typedef flyweight<character_data> character; 
std::vector<character> scanned_html;