About this question

If-Constexpr Field Serializer

Medium · template_metaprogramming · Quant Developer interview question · template-metaprogramming, if-constexpr, c++17, serialization, type-traits

In high-frequency trading, serializing mixed-type data like timestamps, prices, and quantities with zero overhead is critical. C++17's if constexpr enables compile-time polymorphism, allowing a single function template to generate specialized, branch-free code for each data type. This pattern eliminates the performance cost of virtual functions or runtime if-else chains. Task Implement the function template template<typename T> double serialize(double raw). Using if constexpr, the function must