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+/* File : example.i */
+%module example
+
+%contract gcd(int x, int y) {
+require:
+ x >= 0;
+ y >= 0;
+}
+
+%contract fact(int n) {
+require:
+ n >= 0;
+ensure:
+ fact >= 1;
+}
+
+%inline %{
+extern int gcd(int x, int y);
+extern int fact(int n);
+extern double Foo;
+%}