Templates vs. Void Pointers
Many functions that are now implemented with void pointers can be implemented with templates. Void pointers are often used to allow functions to operate on data of an unknown type. When using void pointers, the compiler cannot distinguish types, so it cannot perform type checking or type-specific behavior such as using type-specific operators, operator overloading, or constructors and destructors.
With templates, you can create functions and classes that operate on typed data. The type looks abstracted in the template definition. However, at compile time the compiler creates a separate version of the function for each specified type. This enables the compiler to treat class and function templates as if they acted on specific types. Templates can also improve coding clarity, because you don’t need to create special cases for complex types such as structures.