Bypassing Specialization in Rust: A Clever Use of Function Pointers

2025-07-20
Bypassing Specialization in Rust: A Clever Use of Function Pointers

While developing a Rust FAT driver, the author encountered a roadblock: specialization, currently unavailable in stable Rust. After unsuccessful attempts using macros and generic enums, a clever solution emerged: leveraging function pointers to emulate specialization. While this approach introduces some performance and memory overhead, it offers a viable workaround for specific scenarios, avoiding reliance on unstable features. The author concludes by advocating for the stabilization of specialization, as it promises a more efficient and cleaner solution.

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