Initial Dever 0.0.1

test/rust/fixtures/package/calc/batch.dever

@@ -0,0 +1,19 @@
+public apply(action: handler(value: Int) (answer: Int), value: Int) (answer: Int) {
+  answer = action(value)
+}
+
+public mapValues(values: List<Int>) (answer: List<Int>) {
+  answer = each(calc.value.adjust, values)
+}
+
+public total(values: List<Int>) (answer: Int) {
+  answer = reduce(add, values, 0)
+}
+
+add(value: Int, state: Int) (answer: Int) {
+  answer = state + calc.value.adjust(value)
+}
+
+public verify() (answer: Bool) {
+  answer = total([1, 2, 3]) == 9
+}