WIP

README.md

@@ -21,6 +21,23 @@ printf("new length: %zu\n", scary_length(a)); //=> 2
 You can push elements with automatic memory extension,
 as much as you want.
 
+Moreover, the `scary_push` is a _generic_ function, so this code
+
+```c
+scary_push(&a, 0UL); // Pushing `unsigned long` into an array of `int`!
+```
+
+produces a warning by default with modern compilers like GCC 12.a
+
+<pre><code><b>warning:</b> passing argument 1 of ‘scary_push_uint64’ from incompatible pointer type [-Wincompatible-pointer-types]
+    scary_push(<b>&a</b>, 0UL);
+               <b>^~</b>
+               <b>|</b>
+               <b>int **</b>
+</code></pre>
+
+You can of course opt-in an option `-Werror` to prevent such typing mistakes.
+
 And you'll see **magic** here:
 
 ```c

testlib.c

@@ -22,7 +22,9 @@ Test(libscary, push_and_length) {
 Test(libscary, push) {
     int *a = scary_new(sizeof(int));
     scary_push(&a, 42);
+    scary_push(&a, 0UL);
     cr_expect(eq(sz, 1, scary_length(a)));
+
     scary_free(a);
 
     char *b = scary_new(sizeof(char));
@@ -32,6 +34,10 @@ Test(libscary, push) {
     cr_expect(eq(sz, 2, scary_length(b)));
     cr_expect(eq(chr, 'a', b[0]));
     cr_expect(eq(chr, 'b', b[1]));
+
+
+
+
     scary_free(b);
 }