Specialize me.

How to define methods in template specializations

This is a medium-difficulty C++ question that tests your understanding of template specialization and the mechanics of defining member functions for specialized template classes. It's the kind of question interviewers ask to verify that you can work confidently with template metaprogramming without relying on the compiler to guess your intent.

When you specialize a class template for a specific type (in this case, a pointer-to-pointer type), the syntax for defining its methods differs from both the primary template and regular classes. You need to understand the relationship between the specialization declaration, the scope resolution required, and where definitions can legally appear—whether inline or in a separate translation unit.

• Primary vs. partial vs. explicit specialization
• Scope resolution and name lookup in specialized templates
• Inline vs. out-of-line method definitions for specializations
• Template instantiation and linker visibility