Rust Traits In C++
summary
Shows a concrete path to get Rust Traits–style runtime polymorphism in C++ by building custom virtual table structures and concrete value managers inside a type‑erasure framework (the Type Erasure / sue any family). Implements a serialize affordance with function pointers, ownership (destruct/move/copy), and value semantics, emits compact assembly in Compiler Explorer, and claims performance that matches or beats classic virtual inheritance. Uses small‑buffer optimization to avoid heap hits and demonstrates runnable code that compiles and executes.
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chapters (11)
- 0:00Introduction
- 7:24Runtime polymorphism basics
- 13:23Inheritance for subtyping problems
- 18:44Serialization as polymorphism
- 22:37Rust traits for subtyping
- 27:11Type erasure in C++
- 33:09Virtual tables for dispatch
- 43:07UI binding in practice
- 45:38Live demo on Compiler Explorer
- 53:51C++ type erasure vs Rust traits
- 55:34Conclusion
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