Generic Programming in C: A Comparison of Four Approaches
2025-03-19
C's lack of support for generic types (parametric polymorphism) is a common frustration. This article explores four methods for emulating generics in C: template macros, template headers, type erasure, and inlining macros. Template macros are simple but suffer from readability and error-proneness; template headers improve readability but still have naming challenges; type erasure sacrifices type safety but is useful for FFI or dynamic linking; inlining macros are user-friendly but lead to code bloat. Ultimately, the author suggests choosing between template headers (easier to develop) and inlining macros (easier to use) based on project needs.
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