1 files changed, 13 insertions, 2 deletions
diff --git a/example_vec/new/main.c b/example_vec/new/main.c
index a00c35c..009911e 100644
--- a/example_vec/new/main.c
+++ b/example_vec/new/main.c
@@ -1,10 +1,21 @@
 #include "vec.h"
 
-typedef ints = vec[int]();
-
 #define foreach(name, i, s) \
 	for (name##_iter i = name##_begin(s); !name##_end(s, i); i = name##_next(i))
 
+typedef summable_vec[summable type]() = vec[type](){
+	type <>_sum(struct <> *v) {
+		type sum = 0;
+		for (size_t i = 0; i < v->n; ++i) {
+			sum += v->buf[i];
+		}
+
+		return sum;
+	}
+};
+
+typedef ints = summable_vec[int]();
+
 int main()
 {
 	struct ints ints = ints_create(0);