1 files changed, 31 insertions, 0 deletions
diff --git a/ipl/packs/loadfuncpp/examples/iterate2.cpp b/ipl/packs/loadfuncpp/examples/iterate2.cpp
new file mode 100644
index 0000000..c32bdf9
--- /dev/null
+++ b/ipl/packs/loadfuncpp/examples/iterate2.cpp
@@ -0,0 +1,31 @@
+
+/* Example of a C++ extension to icon via loadfunc,
+ * without garbage collection difficulties.
+ * Type 'make iexample' to build.
+ * Carl Sturtivant, 2008/3/16
+ */
+
+#include "loadfuncpp.h"
+using namespace Icon;
+
+
+struct addup: public iterate {
+    safe total;
+	int count;
+	addup(): total((long)0), count(0) {}
+
+	virtual void takeNext(const value& x) {
+		total = total + x;
+	}
+	virtual bool wantNext(const value& x) {
+		return ++count <= 3;
+	}
+};
+
+extern "C" int iexample(int argc, value argv[]) {
+ 	addup sum;
+ 	sum.every(argv[1], argv[2]);
+ 	argv[0] = sum.total;
+    return SUCCEEDED;
+}
+