test high order function

vlib/compiler/tests/fn_test.v

@@ -115,6 +115,21 @@ fn high_fn_multi_return(a int, b fn (c []int, d []string) ([]int, []string)) {
 
 }
 
+fn sqr(x int) int {
+	return x * x
+}
+
 fn test_fns() {
 	// no asserts for now, just test function declarations above
+	high_fn(sqr)
+}
+
+
+fn test_anon_fn() {
+	/*
+	high_fn(fn (x int) int {
+		println('hello')
+		return x + 1
+	})
+	*/
 }