libboost-flyweight

Flyweights are small-sized handle classes granting constant access to shared common data, thus allowing for the management of large amounts of entities within reasonable memory limits. 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.

Learn about Boost.Flyweight

• Online documentation

Install Boost.Flyweight

• Download Boost and you're ready to go (this is a header-only library requiring no building).
• Using Conan 2: In case you don't have it yet, add an entry for Boost in your conanfile.txt (the example requires at least Boost 1.86):