Elixir's Set-Theoretic Types: Solving the Data Evolution Problem for Libraries
2025-01-14
This article explores how set-theoretic types in Elixir can address the backward compatibility challenges of evolving public data definitions in libraries within statically typed languages. The author illustrates the limitations of existing type systems when handling data structure evolution with an example of interoperability between C and Rust libraries. A solution based on structural subtyping and revisioning is proposed, allowing libraries to extend data structures without breaking existing users. This solution leverages the compiler for automatic type safety verification and supports the coexistence of different data versions across libraries and applications.
Development
Data Evolution