Compile Time PushFront

Compile-time template metaprogramming: PushFront specialization

This is a hard C++ template metaprogramming problem that tests whether you can manipulate types at compile time using template specialization. Quant firms and other performance-critical organizations use questions like this to identify candidates who understand the C++ type system deeply enough to write generic, zero-cost abstractions.

The challenge requires you to design a template that takes a value and a variadic class, then produces a new type with that value prepended. Success hinges on understanding how to pattern-match against variadic template parameters, specialize templates conditionally, and expose the resulting type through a nested alias. The solution must compile cleanly and pass static type checks without any runtime overhead.

• Variadic template parameters and pack expansion
• Template specialization and partial specialization
• Nested type aliases and the SFINAE principle
• Compile-time type construction and equivalence checking