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Difficulty: Medium
Category: template_metaprogramming
Practice quant interview questions from top firms including Jane Street, Citadel, Two Sigma, DE Shaw, and other leading quantitative finance companies.
Topics: sfinae, detection-idiom, void_t, enable_if, type-traits, template-metaprogramming, c++17
In high-frequency trading (HFT) systems, order processing pipelines must handle various order types with maximum efficiency. To enforce a consistent interface (e.g., price(), quantity(), side()) at compile time without relying on virtual functions or a common base class, C++17 developers use the detection idiom. This metaprogramming technique uses std::void_t and SFINAE to create type traits that validate an object's structure, preventing runtime errors and enabling highly generic, performant co
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