+ for (unsigned int i = 0; i < may_read_from.size(); i++)
+ may_read_from[i]->print();
+}
+
+/**
+ * Sets a promise to explore meeting with the given node.
+ * @param i is the promise index.
+ */
+void Node::set_promise(unsigned int i) {
+ if (i >= promises.size())
+ promises.resize(i + 1, PROMISE_IGNORE);
+ if (promises[i] == PROMISE_IGNORE)
+ promises[i] = PROMISE_UNFULFILLED;
+}
+
+/**
+ * Looks up whether a given promise should be satisfied by this node.
+ * @param i The promise index.
+ * @return true if the promise should be satisfied by the given model action.
+ */
+bool Node::get_promise(unsigned int i) {
+ return (i < promises.size()) && (promises[i] == PROMISE_FULFILLED);
+}
+
+/**
+ * Increments to the next combination of promises.
+ * @return true if we have a valid combination.
+ */
+bool Node::increment_promise() {
+ DBG();
+
+ for (unsigned int i = 0; i < promises.size(); i++) {
+ if (promises[i] == PROMISE_UNFULFILLED) {
+ promises[i] = PROMISE_FULFILLED;
+ while (i > 0) {
+ i--;
+ if (promises[i] == PROMISE_FULFILLED)
+ promises[i] = PROMISE_UNFULFILLED;
+ }
+ return true;
+ }
+ }
+ return false;
+}
+
+/**
+ * Returns whether the promise set is empty.
+ * @return true if we have explored all promise combinations.
+ */
+bool Node::promise_empty() {
+ for (unsigned int i = 0; i < promises.size();i++)
+ if (promises[i] == PROMISE_UNFULFILLED)
+ return false;
+ return true;