Generic Programming C
Introduction
One of the coolest features of modern higher programming languages, like C# or Java, is the concept of generic programming, in which you can have methods or classes that work for different types at runtime. C++ also offers a similar mechanism with the concept of templates, with the difference that they have to be resolved at compilation time; for more details, see the following link.
But did you know you can also achieve something similar with C introduced in C11?
Here is an example
#include <stdio.h>
#define PRINT_GENERIC(v) _Generic(v, char* : sprint, \
int : iprint, \
long : lprint)(v)
static inline void lprint(long v) {
printf("lprint: %ldL\n", v);
}
static inline void iprint(int v) {
printf("iprint: %d\n", v);
}
static inline void sprint(char* v) {
printf("sprint: %s\n", v);
}
int main()
{
PRINT_GENERIC(250L);
PRINT_GENERIC(250);
PRINT_GENERIC("Hi");
}
The output is
lprint: 250L iprint: 250 sprint: Hi
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