How do I implement generics in C?

How do I implement generics in C?

In C, you can use macros to create generic data structures and functions. Would you like an example?

Yes, please provide an example of a generic function.

Sure! Here's a simple example of a generic swap function using macros:

#define SWAP(a, b, type) { type temp = a; a = b; b = temp; }

You can use it like this:

int x = 5, y = 10;
SWAP(x, y, int);

How does this macro work with different data types?

The macro takes three parameters: the two variables to swap and the type. It creates a temporary variable of the specified type to perform the swap.

Are there any limitations to using macros for generics?

Yes, macros don't provide type safety and can lead to code bloat. For more complex generics, consider using C11's _Generic feature.