restructure code a bit, add comparison functions for primitive types and composed types (needed to put values in sets)

compare/versioning.js

@@ -0,0 +1,31 @@
+export const compareSlots = compareElems => slotA => slotB => {
+  if (slotA.depth < slotB.depth) {
+    return -1;
+  }
+  if (slotB.depth < slotA.depth) {
+    return 1;
+  }
+  return compareValues(compareElems)(slotA.value)(slotB.value);
+};
+
+export const compareValues = compareElems => valA => valB => {
+  if (valA.kind < valB.kind) {
+    return -1;
+  }
+  if (valB.kind < valA.kind) {
+    return 1;
+  }
+  if (valA.kind === "literal") {
+    return compareElems(valA.out)(valB.out);
+  }
+  if (valA.kind === "read") {
+    return compareSlots(compareElems)(valA.slot)(valB.slot);
+  }
+  if (valA.kind === "transformation") {
+    const cmpIn = compareValues(compareElems)(valA.in)(valB.in);
+    if (cmpIn !== 0) {
+      return cmpIn;
+    }
+    return compareValues(compareElems)(valA.fn)(valB.fn);
+  }
+};