175. Template

Question.9

Two approaches to a generic sort:

C approach -- void*:

void sort(void* arr, int n, int elem_size,
         int (*cmp)(const void*, const void*));

C++ approach -- template:

template<typename T>
void sort(T* arr, int n);

What advantages does the template version provide?

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Templates are slower due to code generation overhead
Type safety (no void* casts), inline-able comparisons (no function pointer indirection), and the compiler can optimize for each specific type -- zero runtime overhead
Both are equivalent in performance and safety
The void* version is better because it uses less Flash

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