Inconsistent arguments.

Applying a function to tuple elements in C++

This medium-difficulty question tests your knowledge of C++ metaprogramming utilities and how to work effectively with std::tuple. It appears regularly in quant-firm coding interviews where candidates must implement generic, type-safe abstractions over heterogeneous data structures.

The core challenge is unpacking a tuple's elements as individual function arguments. C++ provides several mechanisms—index sequences, fold expressions, and helper traits—but only some are idiomatic and practical in a real implementation. The question rewards understanding which tool solves the problem cleanly without unnecessary complexity or runtime overhead.

• Index sequences and compile-time expansion
• Tuple element access and type traits
• Generic function wrappers and forwarding
• Idiomatic C++17 patterns