added generics example

README.md

@@ -45,6 +45,41 @@ RAII (with scope closing destructors in reverse order):
 	creat(Vektor, data, &n);
 	printf("data.count:%d\n", data.count);
 
+## Generics
+
+Generic array using handle.h
+
+
+    #include <stdlib.h>
+    #include "handle.h"
+
+    /* Generic array macro */
+    #define Array(T,AT) struct AT { \
+        size_t count; \
+        T *v; \
+    }; handle(AT) { \
+        if(state == HANDLE_CREAT) { \
+            self->count = *(size_t*) data; \
+            self->v = (T*) calloc(self->count, sizeof(T)); \
+        } else if (state == HANDLE_DESTR){ \
+            if(self->v) free(self->v); \
+        } \
+    }
+
+Usage:
+
+    #include "array.h"
+    Array(uint64_t, Array_uint64);
+    int main() {
+        size_t n = 0;
+        printf("Number of elements to sum: ");
+        scanf(" %zu", &n);
+
+        /* Create a 64 bit array of 'n' elements named 'data' */
+        creat(Array_uint64, data, &n);
+        ...
+    }
+
 ## Compatibility
 
 Ok this might be pain for you but this works only with gcc...