Type-Safe Generic Data Structures in C

Introduces a novel method to implement type-safe generic data structures in C using unions to embed compile-time type information.

Outlines four levels of generic programming: macro-based header inclusion, void pointer storage, inline flexible array storage, and union-based type checking with __typeof__.

Demonstrates a union-based List(type) macro that enforces element type safety without runtime overhead.

Provides workarounds for compilers without __typeof__ support and for passing generic types using typedefs.

Shows that the technique generalizes to other structures like hash maps by parameterizing multiple associated types.