A template, or not not?

Testing C++ template instantiation and operator overloading

This is a medium-difficulty C++ language question that probes your understanding of how templates interact with operator overloading and name resolution. It rewards careful reading of the code structure and knowledge of when template specialization occurs.

To approach questions like this, trace through which overloads are available in scope, how template parameter deduction works, and what the compiler actually instantiates at each call site. The answer hinges on subtle differences in how operators bind to template arguments—the kind of detail that separates confident C++ practitioners from those relying on intuition.

• Template argument deduction and specialization
• Operator overloading resolution in template contexts
• Scope and visibility of overloaded operators
• When templates are instantiated versus when they are merely declared